Polyurethane foam characteristics, properties and application

Tips & Tricks

The following tips and tricks will help you to apply foam from the Makroflex brand qualitatively, productively and safely:

• Before using the product, we recommend holding it at room temperature for about 12-14 hours, this will allow the substance to take the optimal condition for use.
• Before starting work, the processed elements are cleaned of dust. Porous surfaces are moistened with water from a spray. The work is performed at a humidity of more than 60%. If the humidity is low, the surfaces are wetted. Working on frosty or ice-covered surfaces is not recommended. To prevent the substance from getting on other surfaces, they must be covered with polyethylene.
• The ready-to-use substance must have a uniform consistency, therefore, it is recommended to shake the tube immediately before use.
• In the course of work, the can must be held upside down, regardless of the method of applying the material to the coating (manual or with a pistol).

Considering that the foam significantly increases in volume, when installing windows or doors, you need to install special

spacers to avoid deformation of structural elements.
If it becomes necessary to take a break for more than 15 minutes before starting again, it is important to clear the tube of dried pieces of foam.
Foam spots that do not have time to harden are easily cleaned with special means, but the already hardened part can only be cleaned mechanically (cut off).
Makroflex is best used when filling cavities and joints with dimensions of 0.5-8 cm, since in narrower places the substance may not get to the required depth, as a result, voids are formed. Larger seams and crevices may not support the heavy weight of the product.
In order to obtain the greatest foam yield, the tip of the cartridge should be cut off at a 45 degree angle.

• Avoid contact of the finished substance on the skin and organs of vision, this is fraught with severe irritation. If the composition gets in, it must be quickly washed off the skin, and the eyes should be thoroughly rinsed with warm water.
• It is not recommended to remove a completely unused tube from the gun. Replacement is done only if the tube is completely empty.
• Installation work must be carried out exclusively in places with effective ventilation, since substances harmful to the respiratory system are released during the spraying process. Don't forget about protective equipment!
• It is strictly forbidden to use the material on hot surfaces and old electrical wiring. This could lead to an explosion. Smoking is not recommended near sealing solutions.

An analysis of the available reviews and product reviews shows that the overwhelming majority of experts and those who independently used Makroflex foam for the first time recommend this tool for use, based on its very real advantages:

• practicality and ease of use;
• short hardening period;
• quite reasonable price;
• a wide choice for specific conditions of use;
• reliability and durability.

For an overview of Makroflex building glue-foam, see the next video.

Specifications

The official manufacturer declares the following technical parameters of Makroflex products, which in most cases corresponds to reality:

• The final hardening time of the used substance is exactly one day. At temperatures above + 20 ° C, the solidification time is reduced to 1.5-2 hours.
• Heat resistance of the product - from -50 ° С to + 100 ° С.
• The density of the hardened substance is 25-35 kg / m3.
• The ignition temperature of the foam is about 400 ° C.
• The degree of fire resistance of the hardened product is from B1 (fire resistant) to B3 (combustible).
• Foam yield - from 25 to 50 liters, depending on the volume of the package. With similar characteristics, Makroflex brand products provide a substance yield about 10% higher than that of analogues of other brands.

Reliable level of strength - up to 3 N / cm² in compression and tension.
The storage time of the product in the package is up to 15 months (it is better to store the tube vertically to maintain tightness). Storage temperature - not lower than + 5 ° С. It is strictly forbidden to store the product directly under sunlight.
Foam performance is limited by ambient temperature. The product shows its best qualities at temperatures not lower than + 5 ° С. A special compound has been developed and is being sold for work in winter.

Nevertheless, it is important to know that at low temperatures the foam hardens longer, and accordingly, its filling properties also decrease.

Purpose and scope of assembly foam Macroflex 750 ml

The foam canister is already ready for use, therefore, you can use it immediately after purchase. The main essence of its action is to expand and fill the entire space after application. Moreover, it can be used for any surfaces, since "Macroflex Pro" is distinguished by excellent adhesion to all materials, even if they are wet. Of course, the foam yield will depend on the general indicators of the environment - temperature, humidity, as well as the total volume of the filled space.

The most common actions for which an assembly tool is used are:

• Filling voids during construction, sealing any gaps during repairs;
• Increasing the level of noise insulation;
• Sealing joints between pipes and filling around the pipe space;
• Installation with subsequent insulation of doorways, frames and window sills, wall panels;
• Installation of roofing materials, which includes not only their joint, but also insulation.

The best adhesion surfaces for Macroflex Pro foam are concrete, stone, metal and wood. However, it perfectly shows its properties with plastic, as well as with glass. The most important thing is that there is no ice on the surface, since even moisture will not be an obstacle for the sealant to demonstrate its best qualities.

In some cases, construction foam "Macroflex 750 ml" technical characteristics will be indispensable in everyday life, especially if it is planned to carry out repair work, both large and small scale. For example, when replacing old wooden frames with plastic windows, which is popular today, one cannot do without using just such a hermetic material. An excellent option would be to use "Macroflex" when sealing cracks in the walls, if any are found under the old coating.

Often, polyurethane foam is used as insulation, due to its impermeability. For example, doorways are insulated for her at the entrance to a house or apartment. Due to its expansion, the foam perfectly fills all the space provided for it, subject to the availability of appropriate environmental parameters (temperature, humidity, etc.).

Polyurethane foam: technical characteristics

The foam, which is available in 300 ml cylinders, gives a volume yield of 30 liters. That is, such a package is enough to process one door frame. A 500 ml foam balloon, respectively, gives an output of 35-40 liters, and a capacity of 750 ml - 45-50 liters.

Polyurethane foam has the following technical characteristics and properties:

1. The ability to connect different parts of the structure.
2. Heat and sound insulation properties.
3. The ability to seal the junction of any parts.
4. It can fill all hard-to-reach cracks and cavities.
5. Excellent compatibility with many materials (concrete, wood, stone, metal), except for polypropylene, polyethylene, silicone, etc.
6. Porosity.The porous structure ensures the stable behavior of the foam in various joints.
7. Adhesion, that is, the ability to cling to any substrate. This ensures fast and quality filling of the cavities.
8. Shrinkage. After the foam has left the cylinder, expanded and solidified, it shrinks slightly. Its value is one of the main characteristics of the sealant, because the lower the value of this indicator, the stronger the joints will be.

The foam quality depends on several parameters:

1. From the temperature of use. Since foam hardens when it comes into contact with air, which significantly affects the quality and speed of this process, a lot also depends on air. If it is cold and the humidity in it is minimal, then the sealant will harden and expand not so quickly. To improve the hardening process of a material such as polyurethane foam, the technical characteristics of which will only improve from this, special impurities are added to its composition. The temperature for using the foam sealant is indicated on the cans.
2. From expansion. It is known that the foam, coming out of the container, becomes larger (in volume), then, when it dries, it additionally increases in size. This is what affects the quality of the sealing seam, because with a significant expansion of the sealant, the bursting force also increases, which acts on building structures and can lead to deformation of the window profile, door frame, etc.
3. From the viscosity of the material. It affects the ability of the polyurethane foam to stay on the surface and not slide down.

Views

The range of products from Makroflex contains an extensive list of substances of various quality and applicability.

• Makroflex Shaketec (Winter) is an all-season foam used in dry and cool conditions (-10 ° C - + 25 ° C). Provides reliable sound insulation, is able to completely fill voids when repairing roofs, installing doors and window openings.
• Makroflex Premium based on polyurethane belongs to the type of professional assembly tools. When applied, it increases its volume by about 2 times. It is applied to the treated surface with a pistol. The high degree of adhesion of the substance allows it to be used in work with wet structures. It is sold in 750 ml cylinders.

• Makroflex Premium Mega is a professional-grade winter remedy. Used at a temperature of -15 ° C, it provides a reliable degree of adhesion to various building materials.
• Makroflex Pro is applied using a special device, the practical material yield reaches 65 liters. The composition does not contain chloride, fluoride or carbon inclusions, it is used for insulating windows and doors, filling various kinds of voids. As a sealant it is used for insulation of premises.

An independent product category is made up of Makroflex sealants:

Makroflex TA145 is a super heat-resistant material used in conditions of high temperatures or sharp temperature changes (ovens, ceramic panels of kitchen stoves). The solidification of the TA-145 substance is facilitated by a humid environment. The composition does not contain solvents, the product is odorless and dries up within 1-2 days.

Comparative studies show that Makroflex sealant has a number of advantages over conventional sealants. In case of fire, the material burns without forming cracks, where combustion products can penetrate. The finished coating can withstand from -65 ° C to + 315 ° C.

Makroflex AX104 is a highly versatile silicone-based sealing substance used for self-sealing of building elements during work in closed conditions and outdoors. It has excellent adhesion to glass, ceramic and aluminum materials. The product contains anti-fungal components.

The substrate is resistant to the influence of ultraviolet radiation.Favorable temperature for installation - + 5 ° С - + 40 ° С in the absence of moisture. Stored up to 18 months.

• Makroflex NX108. It is characterized by high adhesion to wood, glass, metal, ceramic, plastic, concrete surfaces. The product is resistant to rust and ultraviolet radiation. The advantage of the substrate is that it can be used in high humidity conditions (for example, in a bathroom).
• Makroflex FA131 is an effective frost-resistant polyacrylic product. It is used in the processing of seam elements and structural defects, internal and external work. The material is resistant to sudden temperature changes. It is not recommended to use it in high humidity conditions. The main functionality is the processing of seam elements and defects in concrete, brick, wood and other types of coatings.
• Makroflex SX101. It has a sanitary function as it contains antifungal fungicides. Used in high humidity conditions. Substance is white or colorless.

It should not be used on aquariums as the substrate contains antiseptics. Stains may appear on contact with a stone. Application is limited by temperature conditions - + 5 ° С - + 40 ° С.

Makroflex MFf190 is a powerful extra strong white adhesive based on an aqueous dispersion of polymers. It is used in the process of gluing plastic and wood products for internal and external work. Acts quickly and efficiently.

There is a certain classification that divides foam into household and professional products. When sealing small-sized cracks, installing small products, it is irrational to acquire professional foam. In addition, household level foam increases in volume to a greater extent than professional foam.

It is important to know that the shrinkage of professional foam is small (within 0-3%), for household foam this parameter is up to 5%. Shrinkage should not exceed 5%, since such an excess leads to deformation of the substance, and sometimes to unwanted ruptures.

Based on this, professional Makroflex foam 750 ml is used in more demanding cases, for example:

• thermal insulation of heating networks, roofs;
• filling various voids;
• construction of insulating bulkheads;
• erection of fire-resistant structures (fire-resistant Makroflex FR77).

Manufacturers

There are a number of companies producing polyurethane foam, which occupy leading positions in the world rating of manufacturers.

German company Dr. Schenk is known throughout Europe and has many branches in various countries, including Russia. The company manufactures compounds for both indoor and outdoor use. All products combine quite an acceptable level of quality and affordable prices.

The Estonian company Penosil produces polyurethane foam with a fairly wide range of applications. Such products are often used not only in the construction and repair of housing, but also in various industrial structures. With their high density and low level of expansion, the compounds will be an excellent option for working with door surfaces.

High quality construction foam is produced by the Belgian company Soudal. A distinctive feature of this company is the constant striving to improve its products. More and more new technologies are regularly applied to make the sealant as convenient to use as possible. The product range is also mind-boggling.

Brands from Russia are not inferior to foreign companies. Realist produces both professional and semi-professional formulations that can be used for various types of work and temperature conditions.

Proflex is renowned for the production of exclusively foam sealants. Among them there is a special line of products for external work.Many professionals in the field of construction and repairs note that the products of this company are almost identical to the quality of leading European brands.

Makroflex formulations are of exceptional quality. It is noted that the foam does not crumble after drying, does not crumble and does not lose its original appearance for a long time.

One-component and two-component polyurethane foam - what is the difference?

Polyurethane foam or polyurethane foam sealant is a mixture of two chemicals (polyol and isocyanate) that are derived from crude oil. As a result of the reaction of these components with each other, pure polyurethane foam is formed, which is the basis of the foam after the crystallization process is completed. To improve the properties of the material, various catalysts and adhesion enhancers, refractory additives, antifreeze components and filler gases are often added to the composition. Thanks to the porous structure of the cured polyurethane, the foam is an excellent insulator. It can be applied to surfaces of various materials - stone, concrete, iron, wood, plastic. Such a wide range of compatibility allows you to solve a lot of construction issues. Depending on the chemical composition, a distinction is made between one- and two-component foam.

For the most part, all the variety of this material presented in the windows is one-component. Such a composition is packed in a cylinder. The main disadvantage is a short shelf life due to the possible appearance of uncontrolled reactions inside the balloon and a long curing period. It will take about a day to completely solidify. Its principle of operation is very simple - at the exit from the cylinder, the composition enters into a chemical reaction with moisture contained in the ambient air, instantly increases in volume and after the above time completely solidifies. The foaming agent is a mixture of liquefied gases - a propellant, which consists of butane, isobutane and propane. The same mixture helps to build up pressure inside the container, due to which the foam is released through the nozzle. Upon contact with air, expansion occurs in a 20-40-fold size, which allows filling even the most difficult-to-reach places with high quality and without the formation of internal cavities.

Two-component polyurethane foam is more complex and costly to operate. The difficulty is due to the fact that immediately before use, you will have to mix several constituent components with your own hands, which are stored separately in special cylinders.

In this case, it is very important to strictly adhere to certain proportions, otherwise the resulting mixture will not have the desired characteristics. The chemical reaction, which is formed during mixing, dispenses with the participation of air from the environment and is much faster

Additional costs will be associated with the need to purchase a special mixing gun or installation with a gun, in which the composition will be prepared. Its main difference from one-component material is the speed of curing. The complete crystallization process takes only 20-30 minutes, and the excess material can be cut off within 10 minutes after application. Also, the process of polymerization of two-component foam does not depend on the indicator of air humidity and is always successful. The shelf life is also increased due to the separate content of the constituent substances. However, the prepared mixture is not suitable for repeated use and implies a complete consumption of the container after preparation.

So let's summarize. It makes sense to use two-component compounds only for professional workers in the field of construction and repair. For one-time use at home, a can of one-component polyurethane foam is enough.Even a person who has never used this material before can use foam in a bottle with a nozzle in the form of a plastic tube.

Technical characteristics of Macroflex 750 ml polyurethane foam

The main feature of Macroflex is its properties. They are determined by the characteristics that the manufacturer says on the package. In fact, the material is polyurethane, initially represented by a viscous mixture, which becomes foam at the exit, then hardens due to the influence of moisture.

When solidified, the substance has a certain odor, which then disappears. The finished solidified product has absolutely no aroma. If the air temperature is on average + 20 degrees, and the humidity is not higher than 30%, then the polyurethane will fully fulfill its function within fifteen minutes, after which there is no adhesion effect. However, it is important to maintain the required hardening time. It completely depends on humidity, for example, if it tends to 100%, then solidification will take place within an hour. The maximum full hardening occurs after 24 hours.

In addition, the following technical parameters are characteristic of polyurethane foam:

• Expansion pressure: 1.5 MPa or less.
• The size can change its stability, but not more than 5%.
• Heat resistance of Macroflex on average varies from - 55 to 90 degrees.
• The ignition temperature of the material should reach 400 degrees.
• The recommended shelf life in liquid form is considered to be 15 months.
• The density of the material ranges from 25 to 35 kg / cubic meter.

As technical characteristics, manufacturers also declare the ability to adhere perfectly to any surfaces. However, this property only applies to unfrozen surfaces. In this case, the primary treatment can be carried out within an hour after the application of "Macroflex" to the surface.

Regarding humidity, one can also make one remark that directly relates to the technical characteristics of the polyurethane foam. The approximate moisture absorption of the finished foam is 10%, respectively, if you leave this foam on a surface with higher moisture, there is a risk of destruction of its structure.

Scope of application

Construction foam has a number of important functions:

• sealing;
• soundproof;
• mounting (connecting);
• heat insulating.

Each of these functions is implemented in a specific area of ​​use.

The main areas of application for building foam sealant include the following:

• Warming of premises of an economic nature. Polyurethane foam is often used to seal cracks when insulating garage doors or warehouses.
• Fixation of doors, wall panels, windows.
• Due to the fact that this material is characterized by additional waterproofing and soundproofing of the room, it is often used to fill various gaps when carrying out major repairs in residential premises.
• The material is often also used as an arches fastening in the interior.

Peculiarities

The polyurethane foam mixture consists of highly concentrated hydrogen-oxygen and low-weight liquid components. The base material is a polyol or polyisocyanate. The composition of the foam also includes a propane-butane mixture, substances that accelerate chemical processes. The color of the mixture has a yellowish tint, which can become darker in the sun. Additional components differ depending on the conditions of its use.

The composition is produced in convenient aerosol barrels, a quarter filled with gas under pressure. This makes it possible to carry out heat-insulating repairs, for example, filling joints or seams in a short period of time.

The principle of operation is based on the interaction of a substance with humid air.First, the substance expands, and then hardens with the formation of polyurethane foam. Its ability to expand in volume allows it to tightly fill any openings, thereby providing reliable thermal insulation. After the foam has hardened, wallpaper can be glued to it or plaster or putty can be applied.

Scope of application

Consider the main areas of application of foam from Makroflex:

For the installation of windows and doors

It is important to remember that the use of the material does not exclude the use of the necessary mechanical fasteners, much less replace them. To avoid the formation of defects, it is necessary to install spacers.
In the process of sealing joints, cavities, joints and seam elements.
For sealing joining lines during roofing work.
During the sealing of pipes in buildings.
For self-sealing cracks and holes.
Filling voids in building materials.
For thermal and sound insulation of premises structures.

The advantages of Makroflex foam are:

• no need for special preparatory manipulations;
• versatility and breadth of application;
• ease of use;
• affordable prices;
• reliability;
• fast hardening compared to cement composition;
• the ability to work with wood, stone, metal, PVC and chipboard coatings, concrete and foam concrete products;
• wide temperature range of application;
• elimination of the formation of dust and pollution during the production of work.

The disadvantages include the following points:

• Loss of material performance during prolonged exposure to ultraviolet radiation. To protect it, use dyeing water-based compositions.
• The need for use in work with a substance of special means of protection, since foam negatively affects the respiratory system, skin, irritates the mucous membrane of the eyes.
• Decent consumption of material.

Polyurethane foam with increased output Makroflex 65 PRO

General information:

• Manufacturers: Henkel Macroflex Ltd (Finland)
• OKP code: 225430

Specifications

Technical characteristics: Foam output up to 65 liters. Secondary expansion is less than 30%. Expansion pressure - about 30 N / dm2. Drying time of the surface - 5-12 minutes. Full hardening time - max. 24 hours. Density - 14-18 kg / m3. The spontaneous combustion temperature of the hardened foam is over + 400 ° С. Thermal conductivity - 0.03 W / m * K. The heat resistance of the hardened foam is from -55 ° C to + 100 ° C. Tensile strength - not less than 0.3 kg / cm2. Compressive strength - not less than 0.3 kg / cm2. Application temperature - not lower than + 5 ° С.

Description: Makroflex 65 PRO is a ready-to-use, one-component professional polyurethane polyurethane foam that hardens when exposed to air humidity. The cylinder is equipped with a special valve for use with an applicator gun. Has a slight secondary expansion. When cured, the foam is non-toxic and non-flammable.

Scope: Installation of windows and doors. Sealing seams, joints, holes, cracks and joints. Sealing joints of roof structures and insulation materials. Creation of soundproof screens. Sealing pipe passages in structural elements of buildings. Installation of building parts.

VSN, TR, SNiP, Application Guidelines: VSN 54-96 "Instructions on the technology of sealing and thermal insulation of joints of panels, window and door blocks using Macroflex in residential buildings during renovation"

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By composition

So, according to the composition, there are two types of polyurethane foam - one-component and two-component. The first one is found much more often, and its use is easier and more convenient.

One-piece assembly tape

One-component polyurethane foam was used in construction more than 30 years ago. In its manufacture, the components are mixed at the factory and packed in a sealed package in the form of small metal aerosol cans with a capacity of 1 liter, where 750 ml is a polyurethane component, and the rest of the bottle is filled with gas under pressure.

After spraying, the polymer interacts with the moisture in the surrounding air, increases its volume many times over and hardens to form a stable rigid foam.

The key feature of this type of foam is secondary expansion, that is, the property of the foam to expand in volume after the outer layer has been polymerized. Once you foam any area, you will immediately notice how the foam will increase in volume, but this is not a complete process. After a while, the volume of the applied foam will become even larger. This should be taken into account when sealing - it is necessary to fill the space with foam only by one third, otherwise the foam can deform the surfaces.

The main advantage of one-component foam is simplicity and ease of use. It would seem that if it is so convenient, then why do you need a two-component polyurethane foam? There are reasons for this.

Two-component polyurethane foam

As we can see, one-component formulations are most often used in everyday life and in a professional environment. What about two-component foam? How does it differ from one-component? To understand where you can use two-component polyurethane foam, it is necessary to trace the history of the emergence of this group of materials.

It has been repeatedly noted that one of the significant functional disadvantages of one-component foams is storage instability. This foam can be stored in an airtight container for up to 12 months. In practice, when the storage rules indicated on the packaging are often not followed, the foam in the cylinder is stored much less - about 9-10 months. In addition, there is one secret that few people know about: the longer the product can be stored, the slower it hardens. Accordingly, fast-setting compounds are stored less than we would like.

This factor prompted manufacturers to think: this is because both components that cause the foam to cure are in the same bottle. Separate storage of foam constituent elements will increase the shelf life, making it practically unlimited. However, it was also impossible to separate substances into two separate containers - this would seriously affect the convenience of use. The key condition for the development of two-component polyurethane foam was the preservation of the standard can: the aerosol packaging is convenient to use, so no one wanted to give it up.

The way out was found. It was decided to store the components that cause the foam to cure separately in the can. There is a seal at the bottom of the package that prevents the components from joining. Before use, this shutter is removed by turning the wheel at the bottom of the cylinder. The user mixes the components thoroughly (shakes the bottle) and releases the foam into the desired cavity.

Distinctive features of two-component polyurethane foams are:

• rapid curing, regardless of the humidity of the air or the surface, after fifteen minutes - half an hour, the frozen foam can be processed;
• lack of secondary expansion, which can lead to surface deformation;
• high quality of adhesion to building materials - two-component polyurethane foam "clings" even to those surfaces that are covered with glaze or powder red;
• high levels of insulating and mechanical properties - two-component polyurethane foam can be used to fill narrow cavities and joints with high stress;
• absence of large pores in the hardened material.

Application rules

Prepare the work surface before applying the PU adhesive. The entire area must be cleaned of dust, dirt and debris. The working area is cleaned of old remnants of plaster, paint, cement. The key to successful adhesion is to degrease the surface, as it is necessary to get rid of traces of oil and grease. You can clean the area of ​​dirt with thinner or alcohol.

The glue is applied in a thin layer, evenly spreading over the surface using a plastic spatula or improvised means. Both sides are coated with polyurethane with the addition of solvents. This feature is indicated in the instructions. On a porous material, the composition is applied in two layers with a break of 2-5 minutes. Spray adhesive foam is distributed on the base in strips, along the perimeter not less than 8 cm from the edge. The distance between the strips can be changed from 10 to 25 cm.

After applying the glue, after 5-10 minutes, it is necessary to connect the prepared surfaces, pressing firmly. Roll with a roller if possible for a firm grip. To accelerate the setting, the adhesive side is sprayed with water. The wet method increases the speed of the chemical reaction.

Criterias of choice

When choosing a glue-foam, you should pay attention to working qualities. The adhesive is used for indoor and outdoor use

This suggests that it should prevent heat transfer. Speed ​​is important to work. The sooner the composition rises, the faster you can continue finishing work. Polystyrene foam adhesive must have good adhesion. The better the grip, the better the performance

An equally important quality is consistency. The distribution of the glue over the surface largely depends on the consistency.

Consistency

Consistency is the state of liquids and solids, determined by their density. Substances with high density are distinguished by their density. During the gluing process, this interferes with the good distribution of the composition and increases its consumption. A substance with a low density will spread. This will make the work of poor quality. A good glue foam is characterized by a light consistency, medium thickness and density when cured, about 25 g / cm3.

Vapor tightness

Vapor permeability is the ability of a material to transmit or retain water vapor

Quality is very important for insulation and decoration of buildings. If the finishing material is vapor-permeable, then this is a threat to its fragility.

The deposition of water vapor on the surface leads to the formation of mold. The best option is a material that repels moisture, on the surface of which condensation does not accumulate. Many adhesives have this quality. Foam glue is no exception.

Frost resistance

Frost resistance is the ability of a material to withstand repeated freezing and thawing. In construction, this parameter is used to assess the preservation of the material's operational properties under the influence of moisture and low temperatures. The adhesive foam has this quality to the fullest. It can withstand temperature extremes for many years.

Composition requirements

The composition is of great importance in assessing the quality of building materials. Not only operational capabilities depend on it, but also the health of people. Adhesives should be odorless. In their composition, the presence of toxic substances is unacceptable. The composition of polyurethane glue should not contain carbon dioxide and freon. These substances are harmful to health.

Setting period

The setting time is an important working parameter for the adhesive mass. The speed of work depends on it. The setting period is understood as the time between the joining of the parts and their initial engagement. The setting time for the foam glue is 10-15 minutes.This is a relatively short period of time.

Coupling level

When gluing, the glue particles penetrate into both materials, connecting them. The glued materials are a kind of sandwich, in the middle of which there is an adhesive composition. Substances are added to the adhesive foam that increase its surface energy and help to moisten the work surface. Due to this, the foamed adhesive is widely used for fixing various materials.