Heat-resistant glue: types and features of the composition

Materials that are exposed to periodic exposure to low and high temperatures dictate increased requirements for adhesives. For stoves, fireplaces, underfloor heating and ceramic tiles, you need a high-quality and reliable heat-resistant adhesive. The strength of any material can provide just such an adhesive composition. It is used as a paste or dry mix. To obtain the required consistency, you need to add a certain amount of pure water, depending on the recommendations indicated on the etiquette.

Today, the components of heat-resistant glue are several elements, each of them has special properties:

• sand and cement;
• a mixture of plasticizers (provides the highest show of elasticity and prevents the destruction of the connecting layers);
• synthetic additive (improves the thermal properties of the glue).

Often, a manufacturer can add refractory clay to a heat-resistant adhesive. This is done in order to ensure a strong connection of substances and increase the resistance of the junction to sudden temperature fluctuations.

High-quality heat-resistant glue, which will be used in the future, should be characterized by some properties:

• linear expansion;
• resistance to wear and moisture;
• temperature minimum of stability - not less than three hundred degrees;
• resistance to high and low temperatures at the same time;
• harmless to the environment;
• the composition must be universal, suitable for both indoor and outdoor work;
• ability to good heat transfer.

When using high temperature glue to bond plastic surfaces, it is recommended to use heat resistant plastic. In other words, the characteristics of the materials must match.

When choosing a heat-resistant adhesive, it is necessary to take into account the area of ​​its use. If one composition is most effective for facing a fireplace, stove, facade of a residential building, then the other is suitable for natural stones and glass, the third is for gluing metal elements. And when gluing kitchen utensils, it is more practical to use a special non-toxic heat-resistant adhesive.

Separate categories of heat-resistant glue have their own distinctive components that determine the scope of its use. In general, heat-resistant glue is divided into two main categories: natural and synthetic mixture. The glue category is indicated on the label.

• Natural blend. In the composition of this glue, the main ingredient is sodium metasilicate as an aqueous solution of water glass. When mixed with sand, refractory clay fibers and minerals, an adhesive is obtained.

This environmentally friendly mixture does not emit harmful, toxic substances when heated. Such a composition is often used in home repair work. For example, if you need to fix the seal in the oven.

• Synthetic blend. The production is based on polymers, oligomers, monomers and their combinations. Inorganic substances are used to create the most heat-resistant adhesive. Phosphate adhesive is able to withstand temperatures of 1-2 thousand degrees.Other varieties can withstand even higher temperatures - up to 3 thousand degrees.

The composition of heat-resistant dielectric glue is divided into dry and pasty mixture.

Each of them has certain characteristics that will help you decide on the right product.

• One-component adhesive for bonding ceramic tiles. An acrylic mixture is taken as a basis, to which resin and various modifiers are added. It has a high adhesion rate, you can adjust the position of the tile within twenty minutes.
• Two-component aluminosilicate rubber adhesive. They are made on the basis of two ingredients - polyurethane and epoxy resin. Mix them well when using. This adhesive is known as a fast-setting adhesive, and the correction time is negligible.
• Dry mixes. The basis for the manufacture is taken cement with increased characteristics of elasticity and adhesion. The polymer modifier in the adhesive mixture does not allow cracks to form at high temperature jumps and during compaction of binders.

Each manufacturer has a temperature minimum on the labels that can withstand a transparent, waterproof and any other adhesive. The permissible maximum operating temperature is also indicated.

To date, the range of heat-resistant compounds is striking in its variety. Each manufacturer is trying to produce a higher quality, more versatile option than those already on store shelves. In order not to be mistaken with the choice in all this abundance of brands, it is necessary to have an idea of ​​the most popular adhesives.

• "D-314" - This is an adhesive, which is produced by our domestic company "Diola". It is mainly used for finishing work with stoves and ceramic tiles on fireplaces. The prepared composition is elastic and form-stable, and therefore the tiles do not slip and adhere firmly to the faced surfaces.

• "Super fireplace" Is an adhesive composition with reinforcing fiber from the domestic manufacturer Plitonit. Reliably glues concrete and brick structures that are exposed to heat, ceramic tiles, granite and other natural materials.
• "Hercules" - an adhesive designed for the construction of a fireplace or stove, capable of withstanding surface heating up to a thousand degrees. Perfectly copes with the work of finishing coatings that are constantly exposed to heat: low-porosity ceramic tiles and glazed tiles. The composition makes it possible to carry out finishing work at temperatures from -10 to +35 degrees.

• "Moment Epoxylin" - a very resistant and durable adhesive, which is produced by the world famous company Henkel. Epoxy resin is taken as a basis, the glue is a two-component mixture. It is recommended to use it for bonding metals, ceramic and glass surfaces. After the glue hardens, the formation of the strongest layer occurs, so you can safely polish or drill the necessary holes.
• Adhesive mixture "Terracotta" - ideal for use in facing work.

• Finnish heat-resistant adhesive "Scanmix File" used for the construction of a solid fuel fireplace or stove structure.
• Epoxy adhesive mixture "Adesilex" from an Indonesian manufacturer will perfectly cope with the combination of materials of different composition.

• Refractory adhesive mixture "Parade-77" withstands surface heating up to eight hundred degrees. Not recommended for plastered stove or fireplace surfaces.
• Paste adhesive base "Neomid", with universal characteristics, applicable to fireplaces, stoves, tiles and more. The composition "Pechnik" also possesses such characteristics.

The choice of the required option depends on what materials you plan to glue. In addition, the choice is influenced by the place of use of the glued materials. Good quality glue can withstand temperatures from one hundred and twenty degrees and above.

The condition of the material also plays a significant role.

• Heat-resistant glue for the stove. First you need to determine the location of the future oven. It can be located both inside the dwelling and outside. If the building is on the street, then it will face sudden changes in temperature. During the day - warm sunny weather, and at night - freezing temperatures.

Subsequently, this can lead to flaking of the tiles, so carefully look at the label on the adhesive. The manufacturer is obliged to indicate the tolerance of the composition to such temperature extremes. Take a closer look at products based on talcochlorite and liquid glass - both substances have high thermal conductivity and elasticity. A heat-resistant silicate or heat-resistant silicone two-component sealant will help to get rid of gaps.

• The best option for bonding aluminum and other metals is a two-component polyurethane epoxy adhesive. It contains chemical components that provide a secure fit. It should be noted that the two-component adhesive is mixed with a hardener before use, in a one-to-one ratio. Often the proportions can change, depending on the purpose.
• A bathroom, a bathhouse or a sauna are the most moisture-prone rooms, so when choosing an adhesive, you need to remember this. Before buying, consider which base the ceramic tile will be glued to (to plaster, old tiles, drywall), the type of tile and its moisture absorption properties (this affects the absorption of the glue), the size of the tile (the larger the tile parameters, the thicker the glue layer will be required ), surface area, etc.

Further, it all depends on your preferences and the characteristics of the room in which the facing work will be carried out. For example, in bathrooms it is recommended to choose a dry composition based on cement. Ready-made adhesives have one important nuance: they have a higher price than dry counterparts. It is necessary to use ready-made mixtures on perfectly smooth surfaces. Nevertheless, many still prefer to purchase a dry mixture, it is more affordable in cost and optimal in its characteristics.

• First of all, it is recommended to prepare the surface to be glued. It must be strong, even, free of lime, oil, grease, dust and dirt, as they can reduce the adhesion of the adhesive. When gluing to a substrate that is highly absorbent, it must be treated in advance using a primer emulsion. Leave it to dry completely for several hours.

For poorly absorbent substrates, it is also recommended to process with a specially designed compound. Prepare the surface a couple of days before starting tiling.

• When working with dry mixes, prepare the surface and wait about an hour. The glue is diluted with clean water in a ratio of about a quarter of a liter per kilogram of dry mixture. When mixing, it is best to use a drill or a special mixer to avoid lumps and lumps.
• The algorithm for working with glue is as follows: using a spatula, the composition is applied to the desired surface, smoothed around the perimeter. Next, the tile is pressed (it lends itself to correction within about fifteen minutes after gluing). It is important to remember that the thickness of the mixture to be applied should not exceed more than one centimeter.

Glue with thermal properties has long occupied one of the leading positions among adhesive mixtures. It can be used, for example, on ceramics, durable cast iron, glass ceramics and rubber. He has proven himself well in everyday life. For example, according to the instructions for use, it can be used to treat various parts of the oven. Due to its ability to maintain strength, durability, plasticity and high adhesion, regardless of temperature fluctuations, this material has really become indispensable for construction and repair work.

You can learn how to firmly glue various materials from the video below.