Therefore, it must either be welded or glued. Since welding can only be done by professionals, aluminum glue is a great household option. But for this metal, only special glue is suitable.

Any adhesive intended for aluminum must contain alkalis and acids in its composition, which destroy its oxide film and increase adhesion, providing a strong connection.

• Adhesive for aluminum Mastix. It is used to glue aluminum, seal containers and joints, repair non-ferrous and ferrous metals, wood, ceramics and plastic in any combination. Even at low temperatures, as well as on greasy and damp surfaces, quickly and reliably glues parts. This is a heat-resistant adhesive for aluminum, so the products glued with it can be operated at very low and extremely high temperatures(from -60 to +150 degrees). The cost of a tube with a volume of 55 g: 33 rubles.

• Cold welding ASTROhim ACE-9305. This is a reliable adhesive for instant repairs, which can come in handy in an emergency to fix a breakdown. Its use provides strong bonding of aluminum and its alloys, as well as restoration of broken or lost fragments, including threads. Temperature range: from -60 to +150 degrees Celsius. Packing cost: 82 rubles.

• Cosmopur 819. A one-component polyurethane adhesive solution that can be used to bond aluminium. It gives a viscous and elastic seam between the surfaces to be glued, is used to fill gaps, glue corners aluminum structures designed for doors and windows. It is also designed to work with assembly and structural connections. Solvents are not included in its composition. The cost of a package with a volume of 310 ml: 456 rubles.

• Moment Epoxy Metal. Two-component adhesive that guarantees the bonding of aluminum, steel, copper, iron and many other metal products among themselves and in combination with stone, concrete, marble, organic glass and other materials. Suitable for filling cracks and gaps between surfaces. The cost of a 50 ml package: 320 rubles.

How and how to glue aluminum to aluminum

With development modern technologies it became possible to firmly glue aluminum parts together thanks to the cold method.

For this you will need:

• Cold welding adhesive Mastix;
• Sandpaper;
• Alcohol, acetone or any other degreaser.

To glue aluminum together with this glue, you need:

• With sandpaper, clean the surfaces for connection from rust and dirt;
• Degrease with alcohol or acetone;
• Wait until the surface is dry;
• Cut off the required amount of the rod and mix the two components well with your fingers so as to obtain a homogeneous mass in the form of plasticine. Coloring should be uniform;
• Apply the adhesive mixture to both aluminum surfaces to be joined;
• Press firmly and fix them for 15 minutes until the adhesive hardens.

To what and with what else can aluminum be glued

A two-component epoxy-based aluminum adhesive with high adhesive and heat-resistant properties.

With it, aluminum can be bonded to other materials with different thermal expansion: stone, porcelain, wood or plastic.

To glue an aluminum surface with other metals and materials, it is necessary to prepare:

• Epoxy Heat Resistant Adhesive Moment Epoxy Metal;
• Sandpaper;
• brush;
• Means for degreasing the glued surface (alcohol or acetone).

After that, you can get to work:

1. Clean surfaces to be bonded with a coarse sandpaper to remove dirt and rust;
2. Degrease parts with acetone or alcohol;
3. dry;
4. Squeeze out the contents of two syringes of glue (epoxy mass and hardener) into a separate container in a ratio of 1: 1;
5. Mix the epoxy mass and hardener together well with a brush;
6. Apply glue with a brush on both aluminum surfaces to be glued;
7. Connect the parts and press them tightly for a few seconds;
8. Wipe off excess glue immediately with a cloth;
9. Wait 30 minutes for the adhesive mixture to harden.

Although many do not recognize the effectiveness of using glue for aluminum, choosing the right product and performing the glued work clearly according to the instructions, it can be used to achieve the most durable connection.

Moreover, this type of connection can be combined with mechanical fastening.

Adhesives for the repair of duralumin cases

The use of glue in the repair (and construction) of duralumin hulls provides high bonding strength, moisture and water resistance, resistance to gasoline and oil. Being a good sealing material and dielectric, the adhesive prevents the occurrence of contact and crevice corrosion centers in the joints of parts.

The most affordable are adhesives based on epoxy binder, for example, universal EDP adhesive sold in stores. The package includes an epoxy compound EDP (epoxy resin ED-6 with a plasticizer) and a hardener - polyethylenepolyamine. When preparing the adhesive for 10 weight parts of the compound, it is necessary to measure 1 part of the hardener.

The surfaces to be bonded are cleaned with sandpaper, wire brush or file, then wipe with a swab moistened with acetone or gasoline, and dry.

The adhesive is applied in a thin layer with brushes, spatulas or foam rollers. After a short - within 5-10 minutes - ("open") exposure, the parts are folded and tightly compressed with clamps, zvinok or weights. The glue squeezed out during pressing is removed. For a better fit of the parts and obtaining a glue joint with a thickness of 0.3-0.4 mm, it is necessary to provide a pressing pressure of 0.5-1.0 kg/cm2, evenly distributed over the entire surface to be glued. Under pressure, the parts are kept until the adhesive has completely hardened, which, when room temperature(18-25°) occurs after 24 hours; at higher temperatures, the curing time is somewhat reduced. It must be remembered that the “survivability” of epoxy glue, i.e., the time for maintaining the best adhesive qualities, is from 30 minutes to 2 hours. cm3 for one-sided application and 0.06 g/cm2 for two-sided application.

In cases where it is necessary to fill the gaps between the parts, a filler is introduced into the glue - aluminum powder, metal filings, asbestos, talc, tooth powder or ocher (in dry form). When adding filler, care must be taken to ensure that the adhesive remains fluid and can be easily applied to the surfaces of the parts to be bonded.

Filled adhesive can be used to seal small dents, minor cracks and pits on hull and deck sheets. After the adhesive has cured, the surface is leveled and painted. For a greater guarantee of tightness in case of through cracks in the bottom, it is useful to additionally seal the repaired place with a patch of thin, durable fabric.

A guide to boats, boats and motors. Edited by G. M. Novak.

How to glue aluminum?

Bonding aluminum with adhesives

"Aluminum Adhesive MASTIX" is designed for fast and reliable gluing, repair of parts and assemblies, sealing joints and containers, for restoring lost fragments of products made of non-ferrous (aluminum) and ferrous metals, plastics, ceramics, wood in various combinations. Operating temperature of repaired products is from -60ºС to +150ºС. Provides reliable repair on wet and oily surfaces, at low (down to -10°C) temperatures (provided that the mixture is kneaded in a warm room).

Mode of application

1. The surfaces (areas) to be joined must be cleaned of dirt and rust, be sure to clean with coarse sandpaper (for metals), degrease (with acetone, etc.) and dry.
2. Cut off at least 1/3 of the volume of the rod and thoroughly mix both components with your fingers (may be wet) until a uniform color of the mass is obtained.
3. Apply the resulting mixture to the surface to be repaired. When gluing parts, apply plasticine to both surfaces to be joined and press and fix for 10-15 minutes.

   What and how to glue aluminum to aluminum. Types of cold welding

   When used on wet or oily surfaces, the mixture must be smoothed back and forth until it feels sticky to the surface (in this case, the bond strength is reduced by 20-25% for oily surfaces).

4. If it is necessary to repair at low temperatures, it is recommended, after completing steps 1 and 2, to roll a ball out of the resulting mass and hold it in your hands until it warms up to + 40-50 ° C (but no more than 4 minutes from the start of stirring), and only then apply to the area to be repaired. It is recommended to use less than 1/3 of the total mass.
5. To smooth the surface and give it the desired shape, use flat objects moistened with water.

Attention!

• The pot life of plasticine is 5-7 minutes at +20°C. Under conditions that ensure the removal of the released heat (thin layer, low temperature, etc.), the pot life increases, and when heated, it decreases.
• Plasticine sets in 10-15 minutes at +20°C. At this time, mutual fixation of the parts to be connected is necessary.
• After 1-1.5 hours, the connection can be machined and loaded.

Security measures

Avoid contact of rod components with eyes and skin. Use protective gloves to avoid skin contact when handling. In case of contact with eyes, rinse with water and seek medical advice. Do not use on surfaces in contact with food.

Important

If, as a result of storage for more than 18 months or sharp fluctuations in storage temperatures, the outer layer of cold welding has hardened - heat cold welding to +60 C. You can use heating radiators for this, hot water, top cover car engine, etc.

Compound

Epoxy resin up to 20%, amine hardener up to 8%, plasticizer up to 1%, curing accelerator up to 2%, kaolin up to 35%, chalk up to 30%, aluminum powder up to 5%.

Guarantee period

Warranty period of storage is 18 months from the date of manufacture.

TU 2252-023-90192380-2011

Dispose of as household waste.

Storage conditions

Store in a dry, dark place at a temperature not exceeding +35°C.

How to glue aluminum to aluminum

The high adhesion of the adhesive provides an exceptionally strong connection of aluminum structures.

Scope of application adhesive compositions

• bonding of metal corner connections in the door, window, facade industry;
• used for the power connection of vans when one of the components to be connected is fiberglass plastic;
• a number of other industries where metal parts are fastened.

Application of glue for aluminum

Surfaces are pre-cleaned and degreased by special means, the adhesive composition is applied in a thin layer and the elements are pressed tightly against each other for several seconds. If in the future the connected parts will experience mechanical stress, the application is carried out on almost the entire area of ​​​​gluing.

Determine the duration of the adhesive for aluminum, taking into account temperature regime, humidity, surface type and some other factors.

The advantages of the composition

• ease of use, some types of products are equipped with special nozzles;
• weather resistance;
• glue for aluminum does not spread, does not contain solvent impurities;
• after hardening (about 16 hours) the compound can be painted, undergo other types of processing.

Cosmofen DUO adhesive is used for structural fastening and sealing of metal aluminum, anodised, spray-coated frames and profiles in the manufacture of windows, doors and facades.
more // buy

Fast drying cleaner with antistatic component, used for cleaning aluminum surfaces, planes.
more // buy

Cosmofen CA 12 (20 grams)

more // buy

Cosmofen CA 12 (50 grams)

One-component cyanoacrylate compound with high initial adhesion, good adhesion to a wide variety of materials, particularly high shear and peel strength, durability, water resistance, temperature and chemical resistance.
more // buy

Cosmoplast 500
Single-component cyanoacrylate-based instant adhesive used in both industrial production(metalworking, plastics processing, sealing), and in everyday life.
more // buy

Cosmofen HDP 900 - dosing gun

Reliable manual dosing gun for glue Cosmofen DUO in double tubes 900 gr.
more // buy

Here it is important to take into account that aluminum absolutely does not have any adhesion, because on the surface of the metal there is an oxide film that prevents this (the necessary adhesion).

Nowadays, there is a special adhesive for aluminum structures, which destroys this film, increasing adhesion (adhesion).

That is, you need to buy glue in the instructions of which there is the word “aluminum9.

The best in this area are epoxy- or polyurethane-based adhesives.

There are one-component adhesives for aluminum, there are two-component.

Available for outdoor and internal works, there are universal (that is, both external and internal work).

If you were interested in the brand of glue for aluminum, then this is not a bad option "Ottokol M501".

This adhesive has many advantages, it also works on aluminum, including anodized aluminum.

Can be used both indoors and outdoors (universal).

Virtually odorless.

The aluminum bonding process is alternative way welding. But unlike the second option, the gluing process is relatively simple.

But you need to take into account the fact that only special glue is suitable for these purposes. Alkalis and acids should be present in the composition of such an adhesive, since they contribute to the splitting of the oxide “film”9 and increase the stickiness property.

The photo shows options for such adhesives that can be used for these purposes.

Let's analyze the process of gluing aluminum using Mastix cold welding glue.

At the first stage, using sandpaper, we remove rust from the metal, after which we degrease the surface using acetone.

Apply glue to the surface to be glued. Having connected the surfaces, we fix for 15 minutes, squeezing them tightly.

Aluminum can be glued only with adhesives based on components with polycondensation products of epichlorohydrin with phenols. Or more simply, epoxy resins are the only adhesives that can bond materials such as aluminum. And at the same time, it doesn’t matter if the aluminum surface is processed or not, I’ll say more aluminum cannot be prepared for gluing, since it oxidizes instantly. So don't waste your energy and don't do unnecessary work.

Adhesive for aluminum

Why does aluminum stick badly?

Aluminum is a great metal. Doors, windows, facade systems made of aluminum are lightweight, durable and resistant to environmental influences. One “but”: welding of aluminum structures is a complex process, accessible only to professionals.

Therefore, practically the only available for " common use» gluing remains the method of joining aluminum surfaces. It would seem, what could be easier? However, here aluminum shows its cunning temper.

The fact is that in the normal state, aluminum is covered with a hard oxide film, which has a very low adhesion. If it is not destroyed before gluing, any connection will be fragile and short-lived. Simple machining of a part is ineffective: in air, the surface of the part quickly oxidizes again.

Relatively good results can only be achieved by pre-preparing the surface of aluminum parts with acids, alkalis, or special compounds, usually based on polyurethane or epoxy. Therefore, most of the adhesive compositions produced for aluminum include precisely these chemical compounds.

Adhesive for aluminum

The most common is a two-component adhesive for aluminum. As the name implies, it consists of two components: an epoxy or acrylic mass, and a hardener. These components are mixed before use.

A good quality adhesive bond is achieved if, before gluing, the surfaces of aluminum parts are degreased or coated with a special primer, however, in the latter case, it is necessary to ensure that the primer and adhesive, when mixed, do not give an unexpected chemical reaction. One-component adhesive for aluminum, popularly called "cold welding", is also widely used.

It is very convenient to use, but the resulting adhesive connection fragile, so "cold welding" is usually used to seal cracks and holes.

Special mention should also be made of the bonding of aluminum to other types of surfaces (eg stone). Due to strong big difference in thermal expansion, the adhesive bond of such surfaces will be fragile. Therefore, in such cases, it is recommended to use a mechanical connection or a connection with an elastic adhesive tape.

And let some say that there is no “good” glue for aluminum, with some diligence and following the instructions, you can achieve a high-quality result in gluing this capricious metal.

03/24/2013 at 23:03

What and how to glue aluminum to aluminum. Types of cold welding

Aluminum and its alloys are one of the most common metals in the modern world. It has a lot of advantages, thanks to which it has gained popularity, but its use is also marked by a number of disadvantages. In particular, the problem of fasteners becomes a stumbling block.

This metal does not withstand conventional bolted connections due to its softness. It can be welded with argon. but this requires sophisticated equipment and a skilled worker who may not be readily available.

Therefore, in many cases, especially when the joint does not have special requirements for tensile strength, cold welding for aluminum comes to the rescue.

What is it or types of welding

In fact, the term "cold welding" refers to two different ways of connecting aluminum parts together.

The first, often used in the factory, is based on the principle of diffusion, that is, the interpenetration of the molecules of two solids when they come into contact with each other. Diffusion is, in principle, characteristic of many metals, and in some (aluminum, copper, and some others) the process occurs faster than in others.

This process is initiated by pressure. Under the action of pressure, the molecules of two different aluminum parts seem to “mix” with each other, new intermolecular bonds are formed, and a sufficiently strong seam is formed.

Another way to connect aluminum parts is gluing. It is the adhesive for aluminum that most people most often associate with the very concept of cold welding.

Basically, various two-component compositions are used, the basis of which is epoxy resin. An additional component that provides strength and adhesion to metals is finely dispersed steel powder, which is added to the epoxy base immediately before use.

Such adhesives can be produced in various states of aggregation - both in liquid or semi-liquid form, close to the gel or the actual resin, and in the form of mastic - a plasticine-like mass from which rectangular or cylindrical bars are formed.

Each bar consists of two substances not mixed with each other. Mixing, which activates the adhesive properties of the mastic, occurs in the fingers of a person immediately before application.

Advantages and disadvantages of deformation welding

The first method - cold welding under pressure - is more often used when stamping parts at the factory.

Its main advantage is that the seam is formed from the same material as the parts, this reduces the cost of conveyor production and allows you to form joints that are close in strength to cast parts.

Cold welding of aluminum under pressure, one might say, high-temperature. It allows parts to withstand the same level of heat as pure aluminum.

Advantages of deformation welding:

• withstands large temperature fluctuations;
• withstands great pressure(but no more than the metal itself can withstand);
• exhibits resistance in aggressive environments;
• does not highlight harmful substances into the environment.

The main disadvantage is only the need to use special equipment for such welding.

There are three main ways of such welding:

In the first case, two parts are connected in a butt-to-butt press and are strongly compressed along the longitudinal axis.

In this way, elements with a local joint area (small size) can be welded. It is necessary to take into account the process of "loss" of material after compression: for example, when welding two pieces of aluminum reinforcement in this way, their total length will be 5-7% less than the total length separately.

Using the suture method, two parts with a large seam length are fastened together, for example, two sides of one sheet, forming a pipe. They are overlapped and placed under the pressure roller. Rotating, the roller squeezes the aluminum sheets and presses them against the support shoe, pressing against each other. Thus, a uniform seam is formed.

The disadvantage of this technology is that this seam itself is a weak point in the design. Therefore, where it is required to withstand high loads, the seam-point method is used, in which the roller is not smooth, but protected. The treads are the working ridges that provide localized pressure, and the seam does not look like a line, but like a uniform chain of dots. It is stronger than a "smooth" seam.

And finally, the actual point method - on two overlapped aluminum sheets or plates, a force is applied at several local points by superhard objects - punches.

When they are pressed into aluminum and then removed, a weld point is formed. With the correct calculation of the geometry of these points and the magnitude of the deforming effect, it is possible to achieve a very high quality connection with minimal losses metal.

Please note: in butt welding, antioxidant treatment, that is, abrasion of the surface oxidized layer, occurs simultaneously with the welding process; in all other processes, it is necessary to pre-clean the surfaces of the parts to be welded from oxides.

Advantages and disadvantages of welding with glue

The main advantage of any adhesive compositions is the ease of use in everyday life, for personal needs, including in the production of work with tightness requirements. You can choose an adhesive composition with special additives for high-temperature welding. This method of joining aluminum parts is very simple and cheap.

How to glue aluminum to aluminum? If you are using a two-component mastic bar, then simply cut off the required amount from it and knead it in your fingers until the masses are mixed and softened.

Degrease the surfaces to be bonded with acetone or other solvent, wipe dry and apply the compound. The plastic mass will take any shape and fill any hole, so it can be used to seal cracks in aluminum parts, install plumbing elements and other needs in almost any area.

If you are using a liquid base composition, then, following the instructions, simply mix the metal powder with the epoxy mass until a plastic mass is obtained, and proceed as described above.

If the advantage of such welding is ease of use and low prices for compositions, then there are much more disadvantages.

Cold-welded parts with mastic or glue must not be subjected to heavy loads, especially at breakage. The adhesive provides a seal, but is not capable of withstanding strong pressure, although there are separate compounds that form a very strong connection. Their prices are naturally higher.

High temperatures, and especially temperature extremes, can also not be tolerated by any composition. You should be very attentive to the processing of the parts to be glued, especially to degreasing - any fats reduce the adhesive properties of the adhesive.

The time for complete curing of the adhesive is usually 2 - 2.5 hours. It is necessary to prepare exactly as much glue at a time as you are going to use, otherwise (this is especially true for liquid adhesives), it will freeze tightly, and the dishes in which it was cooked will have to be thrown away. In addition, in order to avoid vapor poisoning, it is recommended to use a respirator during work.

Adhesive for aluminum - answers to important questions

Aluminum is a metal characterized by lightness, strength and resistance to external environmental influences. This metal has its drawback - it does not have adhesive properties.

Therefore, it must either be welded or glued. Since welding can only be done by professionals, aluminum glue is a great household option. But for this metal, only special glue is suitable.

Any adhesive intended for aluminum must contain alkalis and acids in its composition, which destroy its oxide film and increase adhesion, providing a strong connection.

• Adhesive for aluminum Mastix. It is used to glue aluminum, seal containers and joints, repair non-ferrous and ferrous metals, wood, ceramics and plastic in any combination. Even at low temperatures, as well as on greasy and damp surfaces, quickly and reliably glues parts. This is a heat-resistant adhesive for aluminum, so the products glued with it can be operated at very low and extremely high temperatures (from -60 to +150 degrees). The cost of a tube with a volume of 55 g: 33 rubles.

• Cold welding ASTROhim ACE-9305. This is a reliable adhesive for instant repairs, which can come in handy in an emergency to fix a breakdown. Its use provides strong bonding of aluminum and its alloys, as well as restoration of broken or lost fragments, including threads. Temperature range: from -60 to +150 degrees Celsius. Packing cost: 82 rubles.

• Cosmopur 819. A one-component polyurethane adhesive solution that can be used to bond aluminium. It gives a viscous and elastic seam between glued surfaces, is used to fill gaps, glue corners of aluminum structures intended for doors and windows. It is also designed to work with assembly and structural connections. Solvents are not included in its composition. The cost of a package with a volume of 310 ml: 456 rubles.

• Moment Epoxy Metal. A two-component adhesive that guarantees the bonding of aluminum, steel, copper, iron and many other metal products to each other and in combination with stone, concrete, marble, organic glass and other materials. Suitable for filling cracks and gaps between surfaces. The cost of a 50 ml package: 320 rubles.

How and how to glue aluminum to aluminum

With the development of modern technology, it has become possible to firmly glue aluminum parts together thanks to the cold method.

For this you will need:

• Cold welding adhesive Mastix;
• Sandpaper;
• Alcohol, acetone or any other degreaser.

To glue aluminum together with this glue, you need:

• With sandpaper, clean the surfaces for connection from rust and dirt;
• Degrease with alcohol or acetone;
• Wait until the surface is dry;
• Cut off the required amount of the rod and mix the two components well with your fingers so as to obtain a homogeneous mass in the form of plasticine. Coloring should be uniform;
• Apply the adhesive mixture to both aluminum surfaces to be joined;
• Press firmly and fix them for 15 minutes until the adhesive hardens.

To what and with what else can aluminum be glued

A two-component epoxy-based aluminum adhesive with high adhesive and heat-resistant properties.

With it, aluminum can be bonded to other materials with different thermal expansion: stone, porcelain, wood or plastic.

To glue an aluminum surface with other metals and materials, it is necessary to prepare:

• Epoxy Heat Resistant Adhesive Moment Epoxy Metal;
• Sandpaper;
• brush;
• Means for degreasing the glued surface (alcohol or acetone).

After that, you can get to work:

• Clean the surfaces to be bonded with coarse sandpaper to remove dirt and rust;
• Degrease parts with acetone or alcohol;
• dry;
• Squeeze out the contents of two syringes of glue (epoxy mass and hardener) into a separate container in a ratio of 1: 1;
• Mix the epoxy mass and hardener together well with a brush;
• Apply glue with a brush on both aluminum surfaces to be glued;
• Connect the parts and press them tightly for a few seconds;
• Wipe off excess glue immediately with a cloth;
• Wait 30 minutes for the adhesive mixture to harden.

Although many do not recognize the effectiveness of using glue for aluminum, choosing the right product and performing the glued work clearly according to the instructions, it can be used to achieve the most durable connection.

Moreover, this type of connection can be combined with mechanical fastening.

How to glue aluminum?

For gluing aluminum parts, you must use special adhesives, which in their composition contain special substances that do not allow oxide films to form on the glued surface, because it is precisely this that is the problem in the strength of the glued surface.

Look at the glue for the exact purpose - for aluminum and never use an all-purpose glue. One type of glue is MASTIX

Accordingly, before gluing, treat the surface with sandpaper and then wipe it with a solvent and do not waste time, you need to glue it right away, since the film forms quickly and the quality will not be very good.

Aluminum can be bonded with a two-component adhesive based on epoxy resin. In cases where it is necessary to glue not pure aluminum, but a certain aluminum alloy, it is better to give preference to an adhesive containing methyl acrylate.

Before proceeding with gluing aluminum parts, it is necessary to clean them of dirt and grease. This can be done with a stiff brush or brush. Then the parts must be cleaned with sandpaper (preferably fine-grained) and only after that glue is applied (thin strip or dotted), and then the surfaces are pressed tightly against each other.

Aluminum is a great metal. Doors, windows, facade systems made of aluminum are lightweight, durable and resistant to environmental influences. One "but": welding of aluminum structures is a complex process, accessible only to professionals.

Therefore, gluing remains practically the only method of joining aluminum surfaces available for "general use". It would seem, what could be easier? However, here aluminum shows its cunning temper.

The fact is that in the normal state, aluminum is covered with a hard oxide film, which has a very low adhesion. If it is not destroyed before gluing, any connection will be fragile and short-lived. Simple machining of a part is ineffective: in air, the surface of the part quickly oxidizes again.

Relatively good results can be achieved only by pre-preparing the surface of aluminum parts with acids, alkalis, or special compounds, usually based on polyurethane or epoxy. Therefore, most of the adhesive compositions produced for aluminum include precisely these chemical compounds.

Adhesive for aluminum

The most common is a two-component adhesive for aluminum. As the name implies, it consists of two components: an epoxy or acrylic mass, and a hardener. These components are mixed before use.

A good quality adhesive bond is achieved if, before gluing, the surfaces of aluminum parts are degreased or covered with a special primer, however, in the latter case, it is necessary to ensure that the primer and adhesive, when mixed, do not give an unexpected chemical reaction. One-component adhesive for aluminum, popularly called "cold welding", is also widely used.

It is very convenient to use, but the adhesive bond formed by it is fragile, so "cold welding" is usually used to seal cracks and holes.

Special mention should also be made of the bonding of aluminum to other types of surfaces (eg stone). Due to the very large difference in thermal expansion, the adhesive bond of such surfaces will be fragile. Therefore, in such cases, it is recommended to use a mechanical connection or a connection with an elastic adhesive tape.

And let some say that there is no “good” glue for aluminum, with some diligence and following the instructions, you can achieve a high-quality result in gluing this capricious metal.