Best High Temperature Adhesives and Heat Resistant Sealants for 2022

How to choose the best high temperature mixture when there are many types? Heat-resistant adhesives and sealants can help when you need to deal with minor breakdowns at high temperatures. The choice is made, judging by the price and quality of the product, its technical characteristics.

Technical Specifications of Heat Resistant Adhesive

The advantages and disadvantages of a product are determined by how suitable it is for a particular case. The substance is also called cold welding, but it is still not able to replace it. Its main components are resin and a metal component. The resin directly bonds, while the metal elements hold and resist heat. All other components affect the structure and hardening time.

Drying time is complete and primary. Depending on the manufacturer, primary drying takes from five minutes to an hour, full - from an hour to 18 hours. This also affects the average price.

The ability to withstand temperatures in some new products can reach up to 1500 degrees. The average is 260 degrees. In addition to high, you need to consider the ability to withstand low temperatures. If the effect of frost on the repaired element is foreseen, you need to choose an adhesive that will not crack.

There is the following classification: heat-resistant, up to three hours at a temperature of 140 degrees; heat-resistant - from three hours; heat-resistant: from -10 to 140 degrees; heat-resistant - up to 1000 degrees; fire-resistant - contact with open fire up to 3 hours, the temperature must also withstand up to 1000 degrees; refractory - from 3 hours.

General purpose or specialized adhesives

It is necessary to take into account the recommendations of the manufacturer on which surfaces the product will be used.The strength of the dried material should not be less than the density of the material to be glued. This information must be indicated on the packaging.

Popular models are often produced universal. That is, such that they glue completely different types of surfaces. But it is better not to buy them, as they are most often ineffective. It is better to dwell on special types that can only glue those surfaces that are needed at a certain moment. Maybe, at first glance, this is not very economical, and the universal look can be used later, but, in fact, it will turn out cheaper if the quality is acceptable.

Depending on the need, you can save money and buy cheaper types that can withstand +120. It makes no sense to buy an expensive sample if the part will not be subjected to serious thermal damage during operation.

For stoves and fireplaces, heat-resistant types are produced, in addition to the effect of temperature, it should have a number of other advantages. It must be wear-resistant, durable, moisture resistant, not change its functions after exposure to temperature, and not let gases through. It is applied in a thin layer, it does not lose its characteristics. The best adhesives from reputable manufacturers should also have high adhesion, satisfactory heat transfer and resistance to linear expansion. For the furnace, materials are produced for external and internal use.

Special environmentally friendly food heat-resistant types are intended for dishes. They harden after mixing several components. Such mixtures can withstand up to 1200 degrees, and for your safety it is worth buying standing and appropriate for dishes. You should not risk your health and buy inexpensive ones that are not intended for this purpose.

Classification of heat-resistant adhesives

What are the adhesives depending on the working surface: brick, tile, glass, metal. For cars, a separate type is needed, able to withstand vibration and moisture resistance. It also depends on its composition. For bricks, stoves or heating appliances, a composition with a component of cement and clay is used. At the same time, bricks must be laid quickly so that adhesion does not decrease. For facing work of the furnace, a material with aluminosilicate cement and kaolin is used. Glue with these components withstands temperatures up to +1360 and lasts up to 25 years. If you add quartz sand to this composition, you get an expensive material that can withstand one and a half thousand degrees.

Some compounds are able to withstand up to three thousand degrees and resist acids. But they are rarely used at home, when using them, you need to listen to the advice of specialists and carefully study the instructions.

Materials and ingredients for preparation, the volume of containers in which high-temperature glue is sold is an important classification characteristic. The size of the container can vary from small tubes, buckets, the popularity of most models has a 1.7 liter volume, and can reach up to 50 kg. By ingredients, these are one-component and two-component types.

Natural and synthetic blends. Natural ones contain liquid glass - a component called sodium silicate. It mixes with sand, fireclay fibers and other mineral substances. Synthetic ones are often produced in two components, which are activated when mixed. Contain monomers, polymers, oligomers and their combinations.

Specifications of High Temperature Sealant

The functionality of this substance includes filling holes, gluing surfaces and sealing, maintaining high temperatures.Sealant closer to replacing welding, bolts and nails, can be a great alternative to this. This is especially true for heating systems, which are not always possible to repair, financially and physically, due to weather conditions, a breakdown may not be at the right time. This material dries from several minutes to a day. It works on the principle of adhesion of molecules to the bonded surface.

Types of sealants by composition

The selection criteria may be the type of sealant. They are as follows: hybrid mixtures, MS-polymers, heat-resistant and heat-resistant, silicate, thiokol, one-component and two-component.

Hybrid mixtures are able to withstand ultraviolet radiation, have a long shelf life, they can be painted even if they are not completely dry, they are moisture resistant. Withstand no more than 160 degrees Celsius.

MS polymers are environmentally friendly sealants made from natural materials. The most careful in relation to human health, good for the environment.

Heat-resistant sealants are used for brick or stone construction. They withstand up to 360 degrees, are moisture resistant and survive changeable weather conditions. What is the difference between a heat-resistant sealant and a heat-resistant sealant: it can withstand high temperatures, up to +1500.

Sealants with copper and iron oxides. Survive up to 3000 degrees, used for stoves and fireplaces.

Silicate mixtures are very tolerant of high temperatures and stain well. But, what you need to pay attention to, they do not adhere well to some smooth surfaces. This information must be provided by the manufacturer. Black silicate pastes with sodium silicate withstand up to +1500, are used to repair cracks in various structures, including furnaces.

Thiokol are used at gas stations. Resist moisture, gases, fire, able to survive up to 1300 degrees. Also in the construction of outdoor works, have good characteristics of strength and durability.

One-component sealants: those that do not need to mix the components are sold ready-made. Two-component ones are rare, since their use is not entirely convenient. Once the ingredients are mixed, the mixture does not last long and must be used very quickly. Only experienced craftsmen can work with them. One-component often becomes the choice for users who do not have high experience in construction. Which is better to buy depends on the situation, the properties of the product and the skills of the consumer.

Silicone sealants: do not paint, but are sold in different colors, able to survive from 300 to 600 degrees. When choosing this sealant, it is important to avoid mistakes in use: it is not reapplied, it is not used for deep cracks. This type dries faster in the heat. There are acidic and neutral types. Acidic cleaners are not suitable for metal surfaces, wood, cement, stone and other natural materials. They release a toxic substance that spoils them: acetic acid. They are more suitable for plastic surfaces. Neutral include silicate species. The silicone type is colorless, but silicate with the addition of iron oxide - gray, copper - red, acid silicone - with shades of red. They produce only water and alcohol and are suitable for many surfaces, including natural ones.

Form and type of substance

Gasket seals are pieces of material that are glued to surfaces where it is necessary to keep the movement of gases and liquids inside.The 6mm pads fit well and hold the right movement inside.

Adhesive sealant is a sealing material, refers to a synthetic type of sealants. Does not pass oils, gases, moisture, is useful in the repair of the heating system and water supply. The high quality of this type accordingly affects how much it costs.

A fungicide is a material that has the advantage of not molding. It is added to the mixture at the request of the consumer.

Packaging design. Sealants are sold in packages of various weights and sizes, but the important thing is the ability to apply the material economically and accurately on the target. These are special pistols or the corresponding form of container.

Types by area of ​​use

Overview by area of ​​use: fixing threads, bearings, hobs, oven, sandwich panels and tiles, household, electrical engineering.

Sealants with fiber optics, metal shavings, are suitable for parts of the car along which the product of combustion of fuel moves. They consist of sodium silicate and clay components.

Those that are suitable for fixing bearings, very durable and moisture resistant, are used in mechanical engineering, including ships. Threadlockers are plumbing compounds that help repair pipes. Suitable for metal and plastic pipes.

When repairing an oven, it is important to take into account not only the temperature inside it, but also mechanical damage during operation. Exterior wall panels or tiles require waterproof sealants.

In everyday life, environmentally friendly sealants that are not harmful to health are needed to repair kettles and other electrical appliances. Hobs, gas or electric, have different materials in their construction.The sealant must be suitable for glass, metal, ceramics, which is most often used in such devices, have adhesive properties and be elastic. If such surfaces are used in enterprises, it must still meet higher safety requirements: protection against gas leakage and fire.

Synthetic sealants differ from natural sealants by the addition of polymers, which increase the resistance temperature and make the material heat resistant.

Rating of the best adhesives and sealants

Which sealant or adhesive company is better will show the rating of the highest quality products, judging by customer reviews.

Natural adhesives

Where you can buy environmentally friendly adhesives with natural ingredients, the Yandex Market platform will tell you. There are different prices and offers of shops. You can choose the cheapest of them.

Astrochem AC-9315

83 rubles, 55 mg.

Cold welding for metal. It is operated in conditions from -60 to +250 Celsius. Suitable for various types of metal, plastic, ceramics. Sold in a rod, you can mix the components with your hands without protection. To better hold, apply glue to flat objects, leveling them with flat surfaces, lowering them into water before that. It is desirable to press the glued surfaces for 2-3 hours.

• naturalness, harmlessness;
• convenient to use.

• must be fixed for a long time for complete drying.

Glue KC universal

White color based on sodium liquid glass, 899 rubles per 20 kg. Also sold in 5 and 1.5 kg buckets. It takes up to 700 grams of the mixture per square meter. Suitable for indoor work. Bonds almost everything, from glass to parquet, tiles, cladding of various surfaces, including fireplaces.Survives up to 400 degrees.

• budgetary;
• universal;
• explosion-proof, safe;
• elastic and durable after drying;
• frost-resistant.

• dries quickly, but keep it tight for 3 minutes;
• do not work at temperatures below +5.

PECHFORM AC150 OSNOVIT

764 rubles for 25 kg. Dust-free adhesive for facing interior elements. Features of this type of glue is that it is powder, but almost does not form dust. As part of sand and cement, additional elements for better bonding. The possibility of dust generation is reduced by 90%. It can also be used for outdoor work, able to survive up to +150. Designed for different types of stone and tiles: natural stone, ceramic, fireclay, methlakh material. The glue solution is prepared with water, infused for three minutes. Used for 3 hours. After gluing the tiles, grout is done after a day.

• long time of use, the glue does not dry out;
• natural ingredients;
• dilution with water, convenient use.

• apply only at temperatures from +5 to +30, with humidity not higher than 70%;
• low operating temperature range.

COP Construction Artel

130 rubles for 3 kg. Suitable for construction work: fastening linoleum, carpet, tiles to the floor, fastening cladding elements to the ceiling and walls. Also used for facing the stove or fireplace. Can be dyed, has a beige-brown color. Packing - bucket. Withstands up to 150 degrees.

• fire-fighting, against explosions;
• from natural ingredients;
• inexpensive;
• resists frost;

• small temperature range of operation;
• does not withstand open fire.

Adhesives, synthetic

In the online store, without leaving your home, you can order synthetic adhesives. Care must be taken to follow the instructions for use, the toxicity of these materials may limit the scope.

UHU 46670 Metall

255 rubles for 30 gr. tube in a blister. Suitable for metal, alloys such as aluminum or steel, bonds metals to natural and synthetic materials, except PVC, polyethylene, polypropylene, styrofoam. Resists some low concentration acids and alkalis and is water and grease resistant. Temperatures during operation - from -20 to 125. Approximately 7-8 packs are needed per square meter to coat both sides of the surfaces to be glued. If the material has the ability to absorb, you will have to apply several layers of glue until a film appears. After each layer, it is necessary to wait for absorption and drying, up to 15 minutes. After the last layer has dried to such a state that the glue does not stick to the hands, the surfaces are strongly pressed. The quality of the result depends on the pressing force. Holding time does not matter. You can also glue with solvents or with the use of directed heat into the work area with special devices.

• durable and elastic;
• many ways of working;
• glues many different materials to metal.

• it sticks well only at temperatures from +15 to +30;
• at high humidity does not adhere well;
• small temperature range of use.

Mastix Poxy Termo

Epoxy adhesive that contains an oligomer. 84.9 rubles. Withstands up to +250 Celsius. Perfectly glues many materials: metals, wood, plastic, ceramics and glass.There is a mineral and steel filler in the composition. The glue is two-component, can be mixed and stored for 4 hours before use. Dries up to 6 hours. Shelf life is one year.

• can survive low temperatures, up to -60;
• may remain for some time after mixing the components.

• two-component, requires space for the mixing process;
• unnatural, slightly toxic, avoid contact with skin and eyes, wash hands after use.

Mastix MS-0115

47 rubles for 55 grams. Glue cold welding with synthetic components - epoxy resins, metal and mineral impurities. It can keep for an hour and a half. Fast drying - 3 hours. Full - per day.

• inexpensive;
• convenient drying time.

• unnatural.

UHU Kraft

102 rubles for 6 grams, a tube in a blister. Bonds almost all possible materials and even under water. Resistant to acids and alkalis of small concentration, alcohols and ultraviolet, waterproof. Operating temperature from -30 to +70.

• wide scope;
• resistance to various aggressive manifestations of the environment.

• narrow temperature range;
• expensive.

Aviora Monolith 403-218

42 rubles for 45 grams. Cold welded, two-component. Suitable for glass, wood, metal, ceramics, plastic. It is used both for some parts of the car (crankcase, radiator, exhaust system), and for the heating system, water supply.

• eliminates up to 10 mm of damage;
• wide scope.

• non-natural components;
• two-component, not always convenient.

Natural sealants

Here are collected budget and expensive natural sealants, and their properties, judging by consumer reviews.

For car repair ABRO ES-332

280 rubles, produced in a tube of 170 g. Designed to repair the exhaust system of a car. Withstands 1100 degrees, hardens completely in 12 hours. Forms a film in 20 minutes. The air temperature should be +23, humidity 50%. Contains sodium and aluminum silicates, water, pH 11.3.

• safe;
• has no smell;
• resistant to moisture and frost;
• copes well with the function of supporting minor repairs in the house, car.

• there are some problems with the acquisition and availability, the country of manufacture is the United States.

Weicon Silicone HT 300

Price: 930 rubles, 85 ml tube. Weight - 110 grams. Of red color. Survives up to +280 Celsius. Can withstand UV and moisture. Does not contain harmful solvents. Suitable for metal, glass surfaces, aluminum, ceramics and others. Contains acetate.

• in addition to high temperatures, it also withstands low temperatures, up to -50 degrees;
• comfortable in using;
• elastic;
• durable and strong, shelf life - year.

• seals gaps up to 5 mm;
• dries slowly, in 24 hours - 3 mm.

IRFIX HI-TEMP 20069

You can order online in the All Instruments online store at a price of 184 rubles. Produced in a tube of 60 ml, red. Can survive up to 285 degrees. Weighs 95 grams. Waterproof, suitable for wood, glass, plastic, ceramic, galvanized surface. Used for chimneys, some seams of furnaces, machine engines, parts of the heating system. Mainly for outdoor work.

• can be glued in heat up to 50 degrees;
• multifunctional;
• comfortable in using.

• when applying, the air temperature must be at least +1 degree Celsius;
• not paintable.

Done Deal DD6799

The sealant is sold in a jar of 85 g, for 320 rubles. Suitable for car repair, engine, exhaust system. It can also be used for cast iron and steel pipes, furnaces and other equipment. Withstands up to 1400 degrees due to the metal component. Completely hardens in 3-4 hours.

• withstands very high temperatures;
• resistant to vibrations, mechanical damage and temperature extremes.

• according to some buyers - it is destroyed by water, it is necessary to carefully study the description, it may be necessary to avoid water until it dries;
• packaged with dried material.

Loctite 5920 Copper

For car repair, adhesive-sealant for 1665 rubles, 300 grams. Silicone with copper content, contains no volatile chemicals, almost odorless, dries at room temperature, one-component, neutral. Suitable for plastic, wood, various synthetic and natural materials. Good resistance to oils, designed to come into contact with them. Withstands up to 350 degrees. It is tightened with a film in 40 minutes, dries up to 24 hours.

• not harmful, easy to use;
• suitable for many materials;
• dries quickly.

• not paintable.

Synthetic sealants

Sealant material with chemical elements that can sometimes be toxic and dangerous if not followed with precautions.

Weicon Flex 310M HT-200

Grey-coloured adhesive. It costs 2366 rubles, 310 ml.Contains polyoxypropylene. It is stored for a year, withstands up to 200 degrees, if only for short-term exposure. Long-term - from -40 to +90.

• dries quickly, quick drying in 10 minutes, full - in three hours;
• eliminates gaps up to 10 mm;
• pasty structure and convenient use.

• synthetic materials;
• small temperature resistance range.

RTV AXIOM AS202

For the formation of gaskets, black, 158 rubles per tube in a blister, 85 grams. One-component silicone sealant with the addition of a polymer. Primary hardening - up to 20 minutes, full - 2 mm thick in a day. When applied, it should be from 5 to 40 degrees above zero. Withstands from -60 to +345. Stretches five times before breaking. Acid material, used to repair various parts of the car except for the cylinder head gasket.

• acceptable drying time;
• ease of use.

• toxic substances, when working it is necessary to protect the skin and eyes, respiratory organs.

ABRO Gasket Sealant

Black, 32 grams in a tube, 25 rubles. Silicone, acetic based. Withstands up to 260 degrees. Gaskets up to 6 mm thick are made from it. Fast drying in 10 minutes, full drying in 24 hours. Suitable for repairing various parts of the car, including tubes through which technical fluids move.

• durable, elastic;
• withstand temperature extremes, durable;
• waterproof, does not pass oils and other technical automotive fluids;

• toxic, protect skin, eyes and respiratory organs when working

In certain cases, choosing an adhesive or sealant over other repair methods has a number of advantages.This is the speed and ease of repair, these materials are not amenable to mechanical stress, there are those that can withstand more than 1000 degrees. They dry quickly, and this helps to conveniently complete the repair of small and large parts. Often a transparent substance has advantages in use. Nevertheless, such liquids are not suitable for general repairs. For temporary minor repairs only. Surfaces to be bonded must be thoroughly prepared and cleaned.