How to use cold welding

Cold welding - instructions, properties and application

What is cold welding of metals? The technology called welding, as such, is not a process in the usual sense.

In essence, this is a kind of gluing of metal products using a welding compound that penetrates into the top layer of two parts of metal, connecting them firmly.

And although the process itself is carried out under pressure, it is the welding mass that determines the solidity of the welding structure. Or more precisely, deep plastic deformation of both the metal and the mass.

Plastic deformation itself affects the top layer of metals, which is often covered with an oxide layer. Therefore, the distance between the two parts becomes so close that the crystal lattices at the molecular level are practically connected to each other. Essentially, a chemical reaction of the compound occurs.

Advantages of cold welding

The use of cold welding makes it possible to connect parts made of non-ferrous, noble and ferrous metals, plus connect dissimilar metals with each other (copper soldering on aluminum conductors of cables or wires). This method is mainly used if there is a need to join metals that cannot withstand high temperatures.

Other advantages include:

  • No deformation of the products being glued because there is no heating.
  • Increased seam reliability and accuracy.
  • Completely zero waste.
  • No energy costs.
  • No experience is needed to carry out the cold welding process.
  • No tools needed either.
  • The process is 100% environmentally friendly, without the release of gases or smoke.
  • In some situations, this is the only possible option (repair of containers in which explosive materials are stored).

Characteristics and composition of cold welding

Essentially, it is a glue that includes:

  • Epoxy resin, which ensures the plasticity and uniformity of the welding mass. She is the main one.
  • The metal component is the filler.
  • Additional ingredients. The list is large, most often manufacturers use sulfur.

The market offers two types: cold welding adhesive, one-component (ready-made) and two-component.

The quality of the connection is affected by the composition (components) itself, the cleanliness of the surfaces being welded and the rules for using cold welding. If all conditions are met, the weld will be strong. True, it must be noted that a seam made by any other type of welding is much stronger. Therefore, cold welding can be used only for connecting non-load-bearing structures and minor repairs.

The composition of the adhesive component may vary, and it will depend on what temperature the material can withstand. The instructions for use determine this indicator, and if its requirements are followed, the weld should be strong and will withstand the temperature limit specified in the instructions.

The main types of adhesives for cold welding can withstand temperatures up to +260C. But there are also types on the market whose temperature limit reaches +1316C. They are used in places where conventional types of welding processes cannot be used.

The composition of the glue used can be:

  • Plasticine-shaped, it is a bar that must be kneaded before use.
  • Liquid. This is a two-component version with the addition of a hardener to the base.

Types of cold welding

  • Spot. The name itself speaks for itself; welding is done not with a seam, but with points.
  • Suture.
  • Butt. Used for butt jointing of thin metals.
  • With a shift. Used to connect pipe structures, when a pipe of a smaller diameter is inserted into a pipe with a larger diameter.
  • Tavrovaya. This connection method is used in high voltage electrical networks for welding studs with wire leads.

According to its purpose, welding adhesive is divided into:

  • for welding metals;
  • for vehicle repair, it was specially developed for this purpose;
  • a universal option with which you can glue metals with other materials: wood, plastic and others;
  • for welding parts operating under high temperature conditions, this is the so-called heat-resistant cold welding;
  • for special conditions, for example, the process can be carried out under water.

How to use cold welding

Any beginning craftsman can use cold welding for metals (instructions are included with the glue). There are no complex operations or tricky tools here. All you need is:

  • the glue itself;
  • acetone for cleaning the surfaces of metals being joined;
  • clamps, clamps (not always needed);
  • sandpaper if rough sanding is necessary.

Cold welding technology

  1. A preparatory process that includes cleaning the surfaces of two parts to be joined. Degreasing them with acetone. You need to get the surface rough, so use coarse sandpaper.
  2. If liquid glue is used for connection, it must be mixed with a hardener. This usually produces a temperature.

    If “plasticine” is used, then before applying it you need to knead it well with your hands.

  3. In working condition, the glue lasts no more than three minutes, so it must be quickly applied to the welding area.
  4. After which the two metal products are connected to each other. Clamps can be used to apply pressure, although this is not necessary.

How long does it take for cold welding to dry? It all depends on its composition and manufacturer, but the range is quite wide: from 1 hour to 8.

Attention! Cold welding hardens quickly, so it is recommended to wet your hands with water before using it so that the adhesive composition does not stick to them.

This is a simple technology that answers the question of how cold welding works. If you strictly follow the instructions, the weld should be strong. You should not engage in amateur activities, which will certainly lead to a violation of the characteristics of the cold connection, for which instructions are included.

When it comes to cold welding for cast iron, in most cases no adhesive is used. There are completely different welding technologies in which electrodes are used, but the metal is not heated. The technology for cold welding cast iron is actually very complex, and an inexperienced welder cannot do it on his own. The adhesive composition can be used for minor repairs or a temporary solution to the problem.

Cold welding - recommendations for use

Most often, this type of connection is used for repair work on cars. Mufflers, radiators, and gas tanks are welded in this way. The most important thing is to choose the right composition for its intended purpose. This means that parts and assemblies operating at high temperatures require the use of heat-resistant material. You cannot use universal type glue for welding metals. It is better to use a composition that includes a metal filler.

Never use cold welding for parts that are used under pressure. This weld has a low tensile strength; the weld will not work in such conditions for a long time. When using the cold welding process, it is necessary to understand that the higher the temperature the seam can withstand, the higher its strength characteristics.

As you can see, cold welding has excellent properties. And the most important of them is ease of use. Be sure to watch the video - what cold welding is - posted on this page of our website.


Cold welding for metals: how to use according to instructions, types and selection

Among the repair kit items for motorists, you can often see cold welding for metals. This is not surprising, because on a long journey you can get a hole in the gas tank, radiator, or other similar trouble. In such a situation, cold welding can be a salvation. However, there is work for cold welding at home, too. Let's look at what this repair composition is and how to use cold welding.

Cold welding for metal

At its core, cold welding is a special composite polymer that has high adhesion to various materials (in our review, to metals). Simply put, cold welding is an adhesive that has the ability to cure quickly. At the same time, it does not react with motor oils, gasoline and diesel fuel.

The glue is produced in two types:

  1. Liquid composition. It is made on the basis of epoxy resin, which, when mixed with a hardener, begins to gradually harden. The resin can be combined with any substrate or various reinforcing elements (fiberglass, metal mesh). After using the resin, you don’t have to worry about wet discharge, strong odors, or harmful substances.
  2. Plastic composition is a special type of putty. Externally it is a two-layer block. Or it can be sold in the form of two single-layer bars. In appearance, the plastic composition is very similar to ordinary children's plasticine.

Choosing high-quality cold welding for metal

When choosing a repair kit for home or on a long journey, you need to consider the following important factors:

  • what types of surfaces can be glued by the adhesive composition;
  • in what temperature range does the repair mixture work;
  • You should carefully study the instructions and recommendations for use.

When purchasing welding, you should give preference to reliable manufacturers who have proven themselves well. Such as:

  • Loctite;
  • Permatex;
  • Poxipol;
  • Devcon.

Branded brands are not cheap, however, they will not let you down in a difficult situation.

You can learn how to use cold welding correctly by carefully reading the article below.

Cold welding for metal: instructions

The repair composition is widely used in everyday life. For example, it easily glues ceramics. It can be used to seal leaks in pipes.

In auto repair, when trouble strikes while on the road, it is simply irreplaceable. Cold welding can glue loose or chipped metal parts back together. With its help, you can repair damage to the radiator, fuel tank, muffler, crankcase, sump and other elements. Plastic composition is often used for auto repair . Although sometimes liquid is used, because its strength is higher than plastic.

When repairing car parts by welding, it is important that you do not need to drain gasoline, diesel fuel or oil. The malfunction is repaired, as they say, on the spot. This is possible because the repair composition does not react with chemicals, hardens quickly and is easy to use.

To repair a crack in a tank, muffler or pan, the same repair approach is usually used - one procedure . It is important to follow the main steps of the work.

  1. First you should prepare the surface. To do this, the metal is cleaned with sandpaper. If repairs are carried out in the field, then you can do without it. However, the adhesive composition on a previously cleaned surface will last longer. This occurs due to small scratches and roughness, which provide better adhesion of the glue to the metal surface.
  2. Next, the work surface should be degreased. This can be done with anti-silicone, but you can also use regular gasoline. Dip a cloth into it and wipe the surface of the metal.
  3. Preparation for repair actions. Depending on the type of welding used, it is either squeezed out of the tube or cut from the bar. Then the composition should either be stirred or kneaded until smooth. The mixture usually heats up slightly. To work with cold welding, no special skills are required - the instructions that are always included with the repair composition are sufficient.
  4. The process of applying the composition. The damage is repaired with glue, after which the surface is leveled. The operation should be carried out as quickly as possible, because some types of cold welding harden in a few minutes.

Complete drying of the composition can occur in different ways: from an hour to a day . Of course, this is not always possible on the road. Therefore, it is enough to wait twenty minutes for the initial hardening - this is enough to get to the nearest repair point.

Application of cold welding for metal

Working with repair compounds is greatly simplified by knowing some of the nuances .

  • Liquid formulations in syringes. When pressed, the glue and hardener flow out simultaneously and mix. However, this composition should not be applied immediately. You need to squeeze a little into the container and then mix again.
  • Quantity of composition. The composition should be prepared in small portions. The weld initially sets within 5-20 minutes, so if you prepare a large portion of the composition, you may not have time to use it.
  • Plastic and wood. To fasten such dissimilar materials, you can also use cold welding for metals, which is usually mentioned in the instructions.
  • Cleaning and degreasing the surface. As mentioned above, it is not necessary to do this at all, because modern welding also glues to a fatty plane. However, welding on a clean surface guarantees a better repair result.
  • Load. Until the repair composition on the repaired area has completely dried, it is extremely undesirable to expose it to any mechanical loads.
  • Quality of work. It consists of carefully and accurately measuring the amount of welding and hardener to create a repair mixture. The mixture should be mixed with special care.
  • Gloves. Due to the negative effects of some welding components on human skin, gloves should be worn when working.

Popular cold welding manufacturers

From the variety of manufacturers and brands, we can recommend the following brands of repair mixtures .

Adro Steel

A high-end product from an American manufacturer. Outwardly it looks like a bar of two-component putty packed in a cylindrical plastic container. The weight of the container is about 57 g. Due to the fact that the welding composition, in addition to the plasticizer and hardener, also includes a metal filler , it can be used to repair automotive parts:

  • fuel tank;
  • radiator;
  • pallet;
  • muffler, etc.

In addition to car repair, the composition is quite applicable in everyday life. For example, to seal a hole in a metal-plastic or metal pipe. With its help you can repair an aquarium, tools and much more.

Guaranteed connection at temperatures from 50 to 150 degrees .


It hardens quickly and provides maximum adhesion to surfaces. The parts repaired by it can be machined - drilled or cut.

Almaz Press

Welding designed specifically for auto repair. Repairs cracks in tanks, mufflers, etc. Often used to secure a nameplate - the manufacturer's emblem. Consists of epoxy resin and filler on a natural or metal base.

In addition to the above brands, you can name a few more:

  • Skol;
  • Fordo 671;
  • Bitz;
  • Monolith.

All of them are capable of providing a reliable connection even underwater.


From everyday practice and the experience of many drivers, it follows that cold welding can provide very reliable bonding of surfaces. But still, do not forget that welding is essentially just epoxy glue and is not a panacea for serious damage. Therefore, you should not use cold welding to repair key mechanical components, either at home or in your car.


⚡ Cold welding for metal and the technology of its application

Cold welding for metal is an opportunity to make minor repairs without using a welding machine. Essentially, it is an adhesive that securely fastens and seals steel parts. This method is used by plumbers and car enthusiasts. Its main advantage is its ease of use. The HouseChief editors in this material have collected for you useful information about the composition and recommendations for the use of cold welding.

Cold welding is an affordable preparation for urgent repair of metal products

Composition and applications of cold welding

The basis of cold welding is epoxy resin. Depending on the purpose, various additives are added to it, ensuring the strength of the connection under any operating conditions of the parts. After application, the glue hardens within 10-20 minutes, and after several hours it becomes solidly strong.

In addition to holding parts together, cold welding can perform the task of sealing. It is used to fill cracks and small holes in metal pipes and containers.

The scope of cold welding is wide: it includes plumbing work around the house, car repairs, and decoration. But you shouldn’t rely too much on this connection method: after all, it is not as reliable as real welding, and is rather a temporary solution.

Cold welding for metal: varieties

Cold welding is divided according to different criteria. The consistency is liquid and plasticine-like. Liquid components must be mixed together.

In plasticine, the hardener is located inside the block and the components are mixed during kneading.

There is a division of welding by purpose:

  • universal – suitable for fastening parts made of metal, wood and polymers;
  • for metal – they have metal as a filler and are highly durable;
  • automotive – the composition includes components that increase strength to mechanical loads;
  • waterproof - designed for fastening and sealing even under water;
  • high-temperature – parts glued with this composition can be used in the temperature range from -60ºС to +1500ºС.

Waterproof welding is indispensable when repairing plumbing fixtures

Finally, welding can vary in weld type and work surface. She may be:

  • spot – used for repairing copper and aluminum containers, working with aluminum wiring;
  • suture - for large-scale work with metal;
  • butt - for connecting wiring and metal rings;
  • T-bar – designed for working with brass.

Features of operation of glued parts

Cold welding is a polymer mixture that glues parts together after slight heating, literally up to body temperature.

The strength of the connection depends on the preparation of the surface and the correct choice of the type of mixture

Under ideal operating conditions, that is, without the influence of any external factors, the place of such fastening will be very reliable, but still not as strong as during real welding.

Pros and cons of cold welding

In many emergency situations, a polymer composition capable of gluing metal parts will be simply irreplaceable. Here are its main advantages:

  • sold in almost any hardware store;
  • parts can be connected without prior dismantling;
  • sets quickly;
  • the parts being glued are not subject to deformation;
  • the weld seam looks neat;
  • does not generate waste and does not require special work conditions or the use of personal protective equipment;
  • does not require professional skills from the master;
  • withstands high temperature exposure.

Cold welding allows aluminum and copper to be joined together

Cold welding also has its disadvantages. Among them, it should be noted that the fixing time of the mixture is still longer than the time of conventional welding, and the fastening strength is less. In addition, before starting work, you need to devote enough time to thoroughly prepare the surfaces.

How to choose the right composition

The main rule for selecting the type of cold welding is the scope of its application.

Pay attention to the packaging: all the parameters that guarantee the strength of fastening the parts are listed here

Operating temperature

Inexpensive welding options allow parts to be operated at temperatures up to 260ºC. This glue is suitable for repairing items that are not exposed to high temperatures.

There are types of cold welding that can withstand temperature increases up to 1300ºС – 1500ºС

Using this composition, you can fasten and seal products that are constantly heated, for example, water tanks in a bathhouse or even potbelly stoves. An example of such heat-resistant welding is “Almaz” or “Thermo”, domestic products.

Sealing properties of glue

To repair plumbing, you should select waterproof compounds with a metal filler, which guarantees the reliability and tightness of the connection.

Remember that such mixtures are, first of all, sealants, so they are inferior in strength to other types. Moreover, they are also unstable to mechanical stress.

Such welds are most often sold in liquid form, since this type is more convenient to apply to the joints of pipes for joining them

Cold welding for auto repair

Cold welding for auto repair has a number of advantages: it can withstand temperature changes and is resistant to vibration loads. This composition is not afraid of chemical attack, but, as a rule, it does not set on wet surfaces.

If necessary, motorists can make a suitable bolt from such glue and cut a thread on it until the mass completely hardens. Such fasteners will not last long, but they will allow you to get to the service station.

Cold welding is also used for urgent repairs of a broken pipeline, gas tank, radiator, burnt-out muffler, and fastening external parts.

Popular cold welding brands

The range of such products is quite wide, but not all products in this range can be confidently called high-quality. If we talk about domestic brands, Almaz and Polymet enjoy well-deserved trust. Of the imported brands, Hi-Gear and ABRO products were especially highly rated.

High-quality compositions are represented by the following brands.

Titanium. Withstands shear stress up to 4.04 MPa, shear stress – 438 N, tensile stress – 9.5 MPa. Reliably glues non-ferrous and ferrous metals, ceramics, wood and hard plastic. It is resistant to chemical attack and can withstand temperatures up to 130ºC. Epoxin moment.

Good adhesive for metals and alloys, resistant to chemical and mechanical influence. Diamond. Universal composition, affordable. Its only drawback is its fragility when gluing large POXIPOL parts. Waterproof composition, resistant to aggressive environments. Used in plumbing repairs, can withstand temperatures up to 120ºСMastix.

It has an operating temperature range from -60ºС to 150ºС. The disadvantage is the long drying period

Cold welding

Cold welding technology for metal is a well-known and easy-to-use method of joining two parts of the same or even different materials. In fact, this is the gluing of parts with a special plastic compound that penetrates deeply into the material and forms a high-strength seam.

Cold welding

Using this technology, it is possible to weld parts made of ferrous and non-ferrous metals. The method is perfect for materials and products that are prone to deformation when heated. In addition, it is possible to connect different metals, such as multilayer metal strips or aluminum conductors reinforced with copper strips.

How to use cold welding correctly

To obtain a good seam, careful execution of the following steps is of utmost importance:

Technological process of cold welding

  • Clean the bonded surfaces from oil, fat and mechanical contaminants. Cleaning can be mechanical (abrasives, steel brush), chemical (solvents and degreasers) and combined.
  • All actions are carried out only in protective gloves.
  • Squeeze the two-component composition out of the tubes and mix the components well.
  • Separate the required amount of plasticine-shaped composition from the block with a spatula and carefully close the remaining block.
  • Knead the composition. It should heat up slightly, maintaining plasticity; once the required consistency is achieved, apply the mixture to the surfaces to be glued.
  • Securely press the surfaces together by wrapping the parts with an elastic band.
  • If pipes are being repaired, the composition must be applied with several smoothing movements.
  • After the time specified in the technical specifications as the initial drying time (90% of the glue sets), the tourniquet can be removed.
  • The repaired product can only be used after the final hardening time has passed, usually 24 hours.

It is better to remove the remaining adhesive with a spatula after applying and applying the tourniquet. If they have already hardened, they can be removed by lightly tapping them with a hammer.

Temperature characteristics

The composition of the adhesive mass determines what temperature cold welding can withstand. The user manual always states this value. If you carefully follow all the requirements of the manual, the seam will withstand this temperature without loss of strength.

Budget brands are usually developed for a maximum temperature of around 260 C. Special types of mixtures have a maximum operating temperature of over 1300 C. They cost significantly more, but they allow you to repair parts and products operating at high temperatures. This is an excellent help if the use of hot technology is difficult for reasons of fire safety or accessibility of the repair site.

Methods of using cold welding

The method of using cold welding for metal is described in detail in the instructions for its use.

In order for the use of cold welding to be successful and the seam to last a long time, you must carefully follow all points of the instructions. Any carelessness, savings, substitution, etc. will lead to a decrease in the quality and durability of the seam.

Tips for using cold welding

In private life, the method is most often used for car repairs and heating systems. A leaky and sealed muffler or gas tank will serve for many years without requiring replacement.

Unfortunately, the radiator can only be patched up temporarily in this way in order to get to the service station under its own power. It will not be possible to use it constantly. If the location of the leak cannot be determined, you can lower the radiator into a bath of water. Emerging bubbles will indicate the location of the leak.

To repair a muffler, you need to choose a high-temperature brand. If the instructions indicate room temperature for use, then you should wait until the part has cooled before starting repair work.

If you are repairing a heating system, you should choose a composition that can withstand prolonged contact with water. It should be remembered that the method is suitable for repairing small holes. If the damage is significant, it is better to use hot welding.

The method is categorically unsuitable for gluing parts operating under heavy load.

You should not try to replace the brand developed for a specific material with the one you have on hand. The filler must exactly match the materials being glued, otherwise the strength of the seam can be forgotten.

How cold welding works

The solvent contained in the adhesive composition dissolves not only the oxide layer on the surface, but also the near-surface layer of the metal, bringing the atoms of the two parts closer to a distance close to the dimensions of the crystal lattice in a cold state.

This is reminiscent of the processes occurring in the weld pool - the zone of joint melting of the electrode and the surface layers of the parts being joined during hot welding.

Advantages of cold metal welding

The technology has undeniable advantages:

  • Zero electricity or gas consumption.
  • A neat and durable seam does not require further processing.
  • There is no need for lengthy training or special equipment.
  • Makes it possible to firmly connect different metals, for example, aluminum and copper, which are practically not connected by other methods.
  • Makes it possible to repair parts and pipelines without dismantling them, not only in a cold, but also in a hot state.
  • Repair of live electrical installations, containers and pipes under low pressure and even with flammable materials.
  • There are no deformations caused by residual stresses in the metal that arise after hot welding.
  • Highly environmentally friendly process, no hazardous waste.

Neat seam of cold welded linoleum

In addition to all of the above, low labor intensity and low price of consumables make the method economically profitable.

Disadvantages of cold welding

The main disadvantage of this method is the low strength of the seam compared to hot welding. The materials do not fuse, forming a single polycrystal, but stick together. Therefore, the method is unsuitable for highly loaded connections.

Security measures

The components that make up the mixture are highly chemically active and strongly irritate the skin and mucous membranes. If ingested, they cause life-threatening poisoning. Therefore, when working, it is necessary to strictly observe safety measures:

Be sure to wear rubber or plastic gloves

  • Be sure to wear rubber or plastic gloves.
  • When working with a plastic compound, be sure to test the effect of the components on the glove material. If they dissolve, gloves should be taken from a different material.
  • Wear safety glasses or a transparent protective shield. It is especially important to observe this point when working from below the object being repaired - a car, pipeline, etc., in order to prevent pieces of the substance from getting on the face and mucous membranes of the eyes and mouth.
  • In case of accidental contact with skin, rinse immediately with plenty of clean running water.
  • In case of ingestion, drink plenty of fluids, preferably milk, and consult a doctor immediately.
  • Keep away from children! Playing with a plasticine-like substance can end in a hospital or morgue.
  • Do not use for repairing dishes and containers that come into contact with food.

After hardening, the components of the mixture lose their chemical activity and are absolutely safe to touch with your hands.


Cold welding for metal - used correctly

What is cold welding? This question is asked by many of those who are planning to use this tool for quickly joining metals. Without a doubt, many people have heard about cold welding, and a sufficient number of people have already recognized all the advantages of this technology. But, unfortunately, not all of those home craftsmen who have already tried to connect metal parts using such a means were able to appreciate all of its unique characteristics.

Cold welding for metal

The main reason for this situation is that very often our people do not consider it necessary to carefully read the instructions, which stipulate all the nuances of using a particular device or technology. That is why we want to devote this article to all issues related to the rules of use and scope of such a wonderful tool, which, undoubtedly, is cold welding.

Types of cold welding

In essence, cold welding is an adhesive with a high degree of ductility, made on the basis of the well-known epoxy resin. In terms of its structure, this glue can be two-component, in which case it can be stored for a long time, or one-component, which must be applied as quickly as possible so as not to encounter the loss of its adhesive properties.

As a rule, such a product is produced by manufacturers in the form of a two-layer cylinder, the outer shell of which consists of a hardener, and the inner core is epoxy resin mixed with metal dust.

This additive in the form of metal dust is necessary to give the resulting connection high strength and reliability. Contains cold welding and other additives, which give it, as well as the compounds obtained with its help, unique characteristics.

Manufacturers keep most of these additives secret, but the most famous of them is sulfur.

Cold welding is classified mainly according to its area of ​​use, that is, according to those materials that can be joined using its various types. So, today the following types of this product are successfully used.

Cold welding for metal

This tool is actively and successfully used not only by home craftsmen, but also by car enthusiasts, as it allows you to quickly and effectively solve many problems associated with car operation. The connections obtained with its help make it possible not only to forget about the problem that has arisen for a short time, but also to use the restored parts for quite a long time.

However, it should be borne in mind that cold welding demonstrates itself optimally when connecting those parts that do not experience significant loads during operation.

This product has also found wide application in the repair of plumbing fixtures, in which it is necessary to promptly eliminate any leaks that have arisen.

But no matter how reliable it is, you should always remember that it only serves to eliminate the problem that has arisen only temporarily. At the first opportunity, you should use major repair methods.

Cold welding adhesive for various types of plastic

This tool, which is less common, is used, as its name suggests, to perform quick repairs of plastic parts. This glue is used both in manufacturing enterprises and for performing repairs at home. Most often, the need to use such a tool arises in cases where it is necessary to repair plastic pipes and housings of various devices.

Types of cold welding for various materials

Cold welding used to join linoleum

This glue can also be used in cases where it is necessary to connect products made of hard rubber. Naturally, such welding has found wide application in construction and repair work. It should be noted that linoleum joints obtained with its help are significantly superior in their characteristics to those for which glue or double-sided tape was used.

We have listed only the main types of cold welding, but there are others that are less common. All these means are distinguished by high efficiency of obtaining and reliable connections, provided that when performing the work, all necessary requirements were strictly adhered to.

Cold welding - types, applications, characteristics, advantages

What can be glued using cold welding? Before answering this question, it is necessary to consider what is meant by the term “cold welding” and how it differs from traditional hot welding of metal. Having become familiar with the strength characteristics of a cold welded joint, you can answer the question of what can be glued using this method.

Cold welding adhesive is used to join various materials

What is cold welding

In everyday life, this concept usually means a special adhesive composition that is used to connect two different elements into one non-separable unit. It is this interpretation that will be discussed in this article.

Attention! Many people confuse this gluing method with cold welding, which is used in industry. During the production process, molecules from the contacting surfaces of one substance diffuse into another under high pressure.

Useful tips

Following the recommendations will help to connect surfaces as firmly and efficiently as possible:

  1. Before starting work, ensure free access to the area to be repaired; this will make the task much easier.
  2. Most often, cold welding is used to repair damage to radiators or heating batteries and to repair cars. A gas tank repaired in this way will still serve, but it will still have to be replaced.
  3. To repair damage to radiators, choose only high-quality compounds that can withstand high temperatures and are designed for continuous contact with water (for example, epoxy “Contact”).
  4. Cold welding will allow you to efficiently repair minor damage. Holes of significant size can only be sealed for a while. To eliminate large gaps, use a semi-automatic or inverter.
  5. Such an adhesive composition is not suitable for repairing components that carry a large load.

Cold welding is the gluing of two surfaces together; the resulting seam is not very resistant to tearing forces. For this reason, it is preferable to weld important parts in the traditional way or replace them with new ones.

Cold welding for linoleum

This procedure chemically affects the PVC coating. Essentially, the glue melts the edges of two strips of linoleum. After which they are sintered, and a sealed, almost imperceptible seam remains at the joint.

Attention! Care should be taken when performing this type of work. Welding contains solvents. Therefore, if such glue accidentally gets on the coating, aggressive substances can leave stains on it.

This connection method is suitable for any type of linoleum. The method is quite simple and does not require any special equipment. All necessary components are included in the cold welding kit. The cost of the work is low and it is done quickly. It is not recommended to connect using this method only if additional insulation is installed under the coating.

Linoleum adhesive consists of two main components:

  • solvent;
  • filler (liquid PVC).

Depending on the ratio of these two parts in the composition, welding for such floor coverings is of three types:

  1. Type A. It contains a high percentage of solvent. This glue is used when the distance between two strips of linoleum is less than 1 mm. Due to its liquid consistency, this solution easily penetrates into the gap between PVC sheets. Be sure to have a needle attachment. This gluing option is considered the most suitable for home use.
  2. Type C. Contains less solvent. Therefore, this mixture is thicker. Ideal for joining coatings with a gap between 2 and 4 mm. The product can be used with or without an attachment. This option allows you to glue uneven edges of PVC.
  3. Type T. This composition is used quite rarely at home. Mainly used when joining multi-component materials. The T-shaped nozzle prevents the surface from quickly absorbing the product, resulting in much better sintering.

Glue consumption depends on its composition. So, with the more liquid option A, an average of 50–60 ml is spent per 25 meters of seam. While type C requires 1.5 times more for the same distance.

Main welding grades for linoleum:

  • WernerMuller;
  • Tarkett;
  • Homakoll S 401;
  • Second;
  • Sintex;
  • Titanium.

Cold welding for plastic

Bonding plastic parts is another worthy use of cold welding. The large abundance of plastic in everyday life makes this type of connection an indispensable tool for repairing such products:

  • metal-plastic pipelines;
  • car bumpers;
  • fishing rods;
  • garden tools;
  • tourist equipment;
  • various plastic products.

Reference! As a rule, the requirements for welding plastic are not as stringent as those for the composition of metal elements. However, here it is also necessary to take into account further operating conditions of the product: temperature, humidity. And choose glue depending on the situation.

The composition of cold welding for plastic is more similar to glue for metal than for linoleum. It contains epoxy resin as a base. The filler is metal or mineral powder. Due to the absence of heating processes during joining, the possibility of deformation of parts is eliminated. This is especially important when working with plastic.

To sinter the elements, it is enough to apply glue to one of the surfaces, press the other to it and fix it with a small press or clamp. When working with plastic pipes, it is necessary to use moisture-resistant welding. In this case, a special tourniquet is best suited to secure the elements during hardening.

The following types of products have proven themselves well for gluing plastics:

  • Poxipol;
  • Mastix;
  • Second;
  • Super Epoxy Moment;
  • Diamond;
  • Titanium;
  • AVS Crystal.

Cold welding for aluminum (silumin)

Connecting aluminum elements to each other using conventional gas welding is much more difficult than steel ones. This is due to two reasons:


How to use cold welding correctly

Cold welding is a good method that allows you to join metal components without heating. Cold welding is simple and accessible and allows you to obtain strong and reliable connections from ductile metals. It is worth analyzing the cold welding process in more detail, as well as the types of materials and recommendations for their use.

The key characteristics of cold welding are:

  1. Presence and composition of filler.
  2. Initial drying time: the composition is applied and leveled.
  3. Curing time matters. The instructions indicate the exact time.
  4. Use temperature. In other words, this is the temperature indicator at which the mixture can be applied to the surface.

Welding Features

Cold welding – highly plastic adhesive. It is made on the basis of epoxy resin with a two-component structure. Characterized by a long shelf life. In addition, it is used as a one-component product, which must be applied extremely quickly, since it will dry out.

Today, the market sells compounds that can withstand high temperatures. This is where the name high-temperature cold welding comes from. In terms of price, they are not the cheapest, but are considered a good solution if other types of welding are not feasible under certain circumstances.

Cold welding is used not only by people who do their own home repairs, but also by car enthusiasts. Parts fastened in this way will serve for a long period, only in the absence of constant loads.

Very often this type of method is used by plumbers. Cold welding is great when you need to quickly and reliably remove a leak. However, always keep in mind that pipes should not be left in this condition on a long-term basis. Only until you decide on their replacement.

Instructions for use

This substance must be used in accordance with the manufacturer's recommendations, which are shown in the instructions. It is quite simple to use, so it is possible to connect even cracked glass. For these purposes, colorless welding is available.

To make a reliable seam, you must correctly follow the following rules:

  1. Preparation. It is recommended to free the work surface from dirt and remove large protrusions. It is better to pre-dry wet parts if possible. It is necessary to degrease the parts. This is a very significant stage, which guarantees the utmost quality of the connection.
  2. Next you need to prepare the composition. Liquid adhesive must be combined with a hardener, and dry welding must be mixed until smooth. When mixing, use disposable gloves pre-moistened with a small amount of water.
  3. After preparing the consistency, you need to quickly apply it.
  4. After painstakingly connecting the components, it is necessary to level the plane. After complete drying, you can further clean the seam.

Such a simple technique can become indispensable in everyday use, which, if you follow the instructions, is not inferior to classical welding methods.

Despite the high strength of the seam, it should not be used in high-risk areas. For example, for connecting gas pipes. Such work should be trusted only to experts with professional equipment.

Welding different materials

Welding for plastic

This welding option is rarely used. This use can be explained by the fact that for gluing plastic parts it is better to use a special gun - hot glue bonding. Despite the fact that cold welding for metal is better known, welding for plastic is still used. It will be needed in those cases if there is no glue gun or there is no way to plug it into an outlet. This glue instantly holds the parts together.

Cold welding for metal

You can repair plumbing fixtures, specifically to eliminate leaks. However, no matter how durable it is, it is always necessary to remember that it only serves to eliminate the problem that has arisen only temporarily.

Welding for wood

Used by builders or wood specialists. Using this type, you can eliminate the cracks that have formed.

Aqua welding

This type is suitable for gluing surfaces that are constantly in contact with water. With its help you can not only fill deep cracks, but also glue two large parts together. Aqua welding is used in the work of plumbers for gluing batteries, pipes, and ventilation.

Cold welding for linoleum

It is used when it is necessary to connect products made from hard rubber. Of course, such welding has found wide use during repair work. It should be noted that linoleum compounds obtained with its help significantly exceed in their own characteristics those for which glue or double-sided tape was used.

Advice from experienced welders

For the best adhesion of parts, it is recommended to apply glue to a wet surface. The method is more in demand in problems with pipe leaks. Therefore, when performing repair work, you can not turn off the water.

There are some useful tips to remember:

  • When repairing pipes and pipeline components, it is necessary to purchase only a moisture-resistant composition, taking into account constant contact with liquid.
  • If you have to urgently repair a leak in a plastic pipe, such a patch must be changed later - the adhesion will be poor.
  • To harden the mass faster, you can use a hairdryer with warm air.
  • It is worth purchasing only products from trusted manufacturers.
  • You should not use material that has passed its expiration date.

Advantages of cold welding:

  • There is no heating, which means the structure of the metal will not change.
  • You can create a strong seam.
  • Cold welding can be used in emergency fire and explosion hazardous areas.
  • There is no need for special preparation to perform the work.

Have you used cold welding?

It happened! It didn’t happen


  • Before use, the surface must be prepared: cleaned and sanded. When there is paintwork, it must be removed; when there is rust, it must be treated. Afterwards it is necessary to degrease the surface, perhaps, for example, using a solvent.
  • The welding kit itself consists of 2 rods of a plasticine-like substance, which should be mixed directly before use. If you do not mix the composition in time, then after about thirty minutes it will begin to turn to stone.
  • Mix the composition with your hands, kneading it like plasticine.
  • You can apply the finished cold weld by hand. However, for convenience and the most careful appearance, you can use spatulas, having wet them with water in advance.
  • The repaired part must be immobilized for approximately thirty minutes.
  • Final hardening occurs within a day. After this, the surface can be treated like ordinary metal.

To summarize, it is worth noting that cold welding is a unique method of joining metals of different composition and strength.

Its use requires compliance with some specific conditions, but this does not prevent users from using it everywhere, while speaking positively about its characteristics.

other useful articles:

tips on how to use cold welding


Cold welding. Types and application. Operation and features

The need for emergency connections between metal and other surfaces is a very common situation that anyone can encounter. At the same time, not everyone has a welding machine, or the opportunity to invite a master who will perform the required amount of work. In the event that you need to connect some small thing, seal a leak in a container, or fill a chip on the surface of a part, cold welding is used as an adhesive.

What is cold welding

Under this name, an adhesive composition is offered that has a high degree of plasticity. It consists of epoxy resin and is a two-component substance. Usually the product is offered in a small plastic cylindrical container, inside of which there is glue in the form of a sausage.

It is rolled out of two components of different colors. There is a light core and a darker wrapper. The shell is an epoxy resin, and the inner core is a hardener. One of the components of the hardener is metal dust.

Which further provides reinforcement to the composition, increasing its resistance to heat and mechanical stress.

To use the substance, you need to use a knife, scissors or another method to separate a piece of welding from the total mass. Next, mix the two components thoroughly so that the hardener is completely dissolved inside the epoxy resin. Mixing is carried out with massaging movements similar to kneading dough.

Initially the glue is quite hard, so it is difficult to work with. Gradually it acquires the consistency of plasticine and warms up in your hands. Once both components are well mixed, you can begin to use the composition as intended.

Its plasticity lasts for a matter of minutes, so don’t delay the process and get straight to the point.

Less convenient is two-component cold welding in two tubes, from each of which you need to squeeze out a creamy component and mix it. The quality of the resulting composition depends on the correct proportions, but you have to measure the components by eye, so it is difficult to achieve good polymerization. Welding in tubes is more liquid than the plastic substance in the cylinder. It is suitable for tightly joining workpieces together, similar to how Moment glue is used.

Types of cold welding

There are several varieties of this composition, depending on what substances it is intended for gluing.

Cold welding is of the following types for:

  • Metal.
  • Plastic.
  • Linoleum.
  • Concrete, etc.

In addition to highly specialized products, there is also universal welding, which is always useful in the household. It has the most adapted composition to work with all surfaces that need to be connected. It should be noted that the highly specialized range, which is used for its intended purpose, is superior in efficiency to the universal varieties.

Welding for metal

It is used in everyday life, and is also loved by many car enthusiasts. With its help, you can seal a radiator leak, and even the oil pan or cylinder head. Of course, such a measure is temporary and will require a more reliable solution. Despite this, such glue will never hurt in a toolbox, since it allows you to quickly get out of the situation and get to the nearest car service center or garage.

It should be noted that such glue cannot in any case be compared with full-fledged electric arc welding or soldering, since it is more suitable for ensuring tightness than for connecting parts that are under load. If you use it to attach workpieces that move away from each other as a result of pressure, the glue seam will not hold up and the structure will collapse.

In everyday life, the composition is used for sealing:

  • Water pipes.
  • Heating batteries.
  • Broken pots.
  • Cast iron and metal baths.

After the composition hardens, it practically does not react to heat, so if everything is done correctly, the sealed container can be used further for its intended purpose. It is worth noting that welding is not suitable for restoring the integrity of food utensils, since the substances it releases are not desirable for consumption.

There is a separate group of plumbing welding, which is adapted to exposure to a humid environment. Unlike conventional adhesives of this type, it can be used to join or seal wet surfaces. The range of individual manufacturers sets even under water, securely fixing to the surface.

Welding for plastic

Welding for plastics is less popular than the range for joining metals. This is due to the fact that for the purposes where it is used, it is quite possible to use a glue gun, which provides a connection with hot glue. Despite this, welding for plastic surfaces also deserves a place.

It is useful in cases where there is no glue gun or there is no accessible outlet to turn it on. This glue sets quickly, which cannot be said about other compositions, the polymerization of which requires a day. Typically, welding is used for gluing plastic pipes, as well as other surfaces made of this material.

Welding for linoleum and rubber

Cold welding, which is used to join linoleum and rubber, deserves special attention. A similar product is used for repairs and finishing work.

The quality of the connection of this composition is significantly superior to double-sided tape or liquid glue.

Typically, welding is used only in cases where it is necessary to carry out a quick repair, since its exclusive use for the purpose of gluing linoleum to the floor throughout the entire room will require a lot of time and a large consumption of funds.

Welding for concrete

The composition, which is intended for concrete, has good bonding ability. Concrete has high hygroscopicity and dust separation, so it cannot always provide reliable fixation to itself. This glue is used in cases where you need to fix something to concrete without drilling. It is also used to restore broken concrete products such as statues and monuments.

How to achieve maximum connecting power

In order for cold welding to connect surfaces very reliably and stably, it is important to comply with all the conditions listed in the instructions. First you need to take care of preparing the surface. This must be done long before mixing welding components.

Using sandpaper, the material is cleaned if there are other layers on it. For example, if you need to seal a battery, it is better that the resin sticks to the metal rather than the paint covering it. Sanding removes dirt and possible rust.

The maximum degree of connection is achieved if the glue not only touches the clean material, but also penetrates deeply into its structure. In this regard, if possible, it is necessary to apply deep scratches at the bonding points. Welding will fill them and will be securely held inside, preventing the frozen mass from coming off.

It is best if gluing is carried out on a dry surface. Even though cold welding can work on wet materials, it is safer to use it on dry products if possible. For degreasing before using welding, it is best to use acetone. It removes grease stains and evaporates quickly, so immediately after it you can begin direct gluing. All that remains is to mix the two-component composition according to the instructions and carry out gluing.

When mixing the glue components, small particles of epoxy resin remain on your hands, and in the future it is difficult to get rid of them. To avoid using gloves that you will simply have to throw away later, you can use a little trick. You should wet your hands before mixing the mixture. Welding does not stick well to wet palms, and a small amount of water does not affect its properties in any way.

Differences between cold welding and other types of glue

Cold welding cannot be put on a par with other types of adhesive compositions, since it is a radically different product. Firstly, it is resistant to high temperatures. The product does not burn easily, which cannot be said about the vast majority of adhesives.

After hardening, the welding becomes rock hard, even if applied in a thick layer. Due to this, it is used primarily not for fastening parts, but for restoring missing parts of various objects and mechanisms.

For example, if there is a chip on the tabletop, it can be filled by welding. After it hardens, all that remains is to sand the hard surface and paint it with the same paint as the rest of the countertop. Visually it is almost invisible.

Welding as a modeling putty is one of the priority areas of its use.

Advantages and disadvantages

Cold welding has a number of advantages, which are the reason for its popularity.

The advantages of the product include:

  • Affordable price.
  • No cracks after drying.
  • Easy to use.
  • High reliability after hardening.
  • Possibility of application for modeling.
  • No shrinkage.
  • Temperature resistance.

It can be said that cold welding has no disadvantages, but there are limitations that it has.

If you expect something large-scale from such an adhesive, the modest characteristics of the epoxy composition may seem like a disadvantage. But still, this substance cannot be compared with classical methods of joining workpieces. Electric arc welding will always provide a more efficient metal connection, just like a screw that secures two pieces of wood.

Glue is an emergency method of quick repair or is used in cases where it is necessary to simulate a broken part of a product, replacing it with a hardened epoxy compound.

Related topics:


Cold welding for metal - choosing the best option and application features

Cold welding technology appeared in our country relatively recently, but has already become quite popular. What it is, you will learn from this article.

Features of the concept

In fact, as can be seen in the photo of cold welding, this is not welding at all, but a method of obtaining permanent connections by gluing metal parts without heating them. For this purpose, a special glue is used, which, when hardened, forms a seam similar to a welded metal one.

The scope of application of cold welding is the following cases:

  • A situation where there is a possibility that the metal structure may undergo minor deformation at the weld area.
  • The elements that need to be connected have a complex geometric shape.
  • The parts to be joined have different textures.

Rules for using cold welding

How to use cold welding? The method is quite simple. Let's describe it, taking the repair of a gas tank as an example.

Cold welding, instructions:

  • We find the damaged area.
  • Drain the contents of the gas tank.
  • We clean and degrease the damaged area.
  • Preparing the adhesive composition for cold welding.
  • Apply glue to the damaged area and, if necessary, apply a metal patch. Press the parts to be glued tightly. The procedure must be carried out quite quickly, because the adhesive mass hardens almost immediately.
  • Sand the resulting seams using sandpaper.

High temperature adhesive composition

The main difference between high-temperature cold welding is its ability to withstand high temperatures up to 1300°C. This method is used when carrying out repair work on exhaust manifolds, if necessary, repairing exhaust pipes of cars, heat boilers, etc.

The product can be used not only in everyday life, but also in industry. High-temperature glue is not afraid of open contact with fire.

Advantages of this type of cold welding:

  • Ease of use.
  • The seams are not subject to corrosion damage.
  • After the adhesive mass has hardened, it can be treated with sand.
  • Chemical resistance.
  • Plastic.
  • Environmental Safety.
  • It can be called “mobile” because it can be used even while traveling.
  • Fast hardening time.

Other types of cold welding

There are also the following types of similar glue:

Adhesive for various plastics

Not widely used. It is used both in everyday life and in production, if there is a need to quickly glue damaged plastic elements, for example, pipes and instrument housings.

Adhesive for linoleum

It can also be used for gluing hard rubber surfaces. This type of cold welding is popular in construction. It is also used for repairs.

In terms of its quality characteristics, it surpasses the adhesives or double-sided tapes usually used for laying linoleum.

In conclusion, we note that before using cold welding, you must read the instructions included with it and strictly follow safety precautions. And so, using such a product is quite easy.

Photo of cold metal welding

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