How to make mounting foam at home. All about mounting foam

Sealing agents are indispensable in construction. The most popular among them are sealants and polyurethane foam. Many people still confuse these types of sealing mastic, thinking that they are one and the same. Actually it is not. Mounting foam is not a sealant in the full sense of the word. Mounting foam is used to seal seams and joints with a width of 3 cm. Sealants are used to seal joints and seams no more than 3 cm

Polyurethane foam, in turn, is a stable chemical structure, with a low own weight and a high internal concentration. Mounting foam is sold in metal aerosol cans. Shake well before use. One cylinder gives up to 40 - 45 liters of finished foam. Mounting foam hardens under the influence of air moisture. In the process of hardening, the mounting foam increases significantly in volume, forming a porous mass with excellent heat and sound insulating properties. Mounting foam is used for gluing, fixing, sealing seams, heat and sound insulation.

Polyurethane foam can be professional (pistol), semi-professional, summer, winter and all-weather.

Polyurethane foam (abbreviated MP) is sold in cylinders containing a liquid prepolymer and a propellant (propellant). When the contents "leave" the container under the influence of air humidity and surface moisture, a polymerization (hardening) reaction occurs. The result is a fairly rigid polyurethane foam. Here are the main properties of foam, for which builders appreciate it so much:

• assembly (attaches, connects separate parts of the structure),
• soundproof,
• heat-insulating,
• sealing.

In addition, polyurethane foam has other unconditional advantages.

First, the MP, expanding, fills all hard-to-reach cavities and joints.

Secondly, it is self-hardening, so it is convenient and easy to work with it. For comparison: earlier, instead of foam, cement and tow were used for such work. First, the cement was diluted with water, then it was mixed with tow. In a word, the installation process was long, multi-stage and often ineffective. Now, one can of polyurethane foam is enough to get the same result without much effort and even better.

Thirdly, MP is a universal material: more than a thousand options for its use in construction and industry are now known.

Another indisputable advantage of mounting foam: it is designed to work with all traditional building materials (wood, stone, concrete, plaster, metal, glass). The only exceptions are polyethylene, polypropylene, teflon, silicone, etc.

The use of mounting foam

Polyurethane foam has occupied that part of the market, which before its appearance was dominated by traditional materials - cement, corks, bitumen, mineral wool tapes, plaster, etc. MP has established itself as a universal insulating material, filling cracks, gluing surfaces, moisture-proof, conductive electricity, fireproof (this indicator depends on the flammability class of MP). All this makes it possible to widely use polyurethane foam for sealing and soundproofing, gluing materials. So, let's take a closer look.

Insulation (sealing)

Filling cracks in cold rooms (insulation);

Filling cracks and crevices in roofing materials;

Filling voids around window and door frames, as well as other structures;

Gluing

Fixing door and window blocks (and then you do not need to additionally screw or nail with screws or nails).

Fixing insulating and insulating materials on the walls (if it is necessary to insulate the room, for example, with foam plates, the question often arises: how to glue the plates to the wall? The simplest solution is mounting foam).

Soundproofing

MP allows you to reduce the noise that occurs during the operation of pipelines, air conditioners or space heating systems. Foam close up the junction of hoods and air conditioners, the gaps between the pipes. And if there are no cracks, then there will be no rattling and noise. The use of foam in everyday life

Installation of window and door blocks.

Filling cracks and voids during repair and construction in country houses and city apartments.

Wide range of applications during indoor renovations (e.g. fixing wall panels, etc.).

Polyurethane foam can be used to seal cracks and holes on floating craft (boats, rafts, etc.)

As you can see, the possibilities of polyurethane foam are not limited. The only thing is that you need to know how to use it correctly. And for this we advise you to carefully read the instructions for use. The final result depends on how competent your actions will be.

Mode of application.

Professional. This name is more common. Manufacturers call it pistol foam. It differs only in the presence of working cylinder valves, that is, pistol foam is used with a special mounting gun. A mounting gun is a device that is put on a special cylinder valve designed specifically for it, thanks to which foam is supplied and dosed into cavities and crevices. Why is it still "professional"? Yes, because such a mounting gun costs 10 or even 15 times more than the foam cylinder itself. And there is absolutely no point in acquiring it for one-time housework. Such pistols are used by professionals, namely builders and repairmen who have to work with polyurethane foam sealants on a daily basis.

It is much more convenient to use the assembly gun thanks to the ergonomic handle and the dispenser trigger, in addition, the gun has a long metal barrel, which allows you to work in hard-to-reach places. But caring for the gun requires additional costs, after each use it must be washed with a special cleaning agent, which frees the working cavities of the device from the remaining foam that has not yet hardened in it. The cleaning agent itself is also under pressure in a bottle that has special nozzles that make it easier to clean.

Semi-professional. Mounting foam, the use of which does not require any additional devices (mounting guns). To spray polyurethane foam, a special plastic tube with a lever (adapter) attached to each cylinder is put on the valve. It is quite convenient and practical for a small amount of work. If you have not used up all the foam from the can, then the tube can be removed, washed with acetone or a special cleaning agent and set aside with the unused can until the next time.

Use temperature

Summer foam. The temperature indicated on the cans is from +5°C to +35°C, which means that the temperature of the treated surfaces must be within this range. But this does not affect the temperature resistance of the hardened foam in any way - both in summer and in winter it ranges from -50 ° C to + 90 ° C.

Winter foam. The operating temperature of this foam is between -18°C (-10°C) and +35°C. It should be noted that the volume of foam after its spraying and expansion (foam output) decreases in proportion to the decrease in ambient temperature. For example, the output of foam from a 300 ml cylinder at +20°C is 30 l, at 0°C - about 25 l, at -5°C - about 20 l, at -10°C - about 15 l.

All season foam. It has absorbed all the best from summer and winter modifications, its special formula allows you to get a large foam yield, a fast polymerization process and work at low temperatures down to -10 ° C with an unheated cylinder. All-weather foam is a novelty and therefore is not present in the product range of all manufacturers of polyurethane foam.

Cylinder capacity

The output of foam from a cylinder designed for use with a mounting gun is more abundant than from a conventional cylinder of the same volume, due to the higher pressure in the cylinder, which allows filling a large amount of starting material.

300 ml - foam output up to 30 l, which makes it possible to process one standard door frame with a gap of three to five centimeters.
500 ml - foam output 35-40 l, under the same conditions - one and a half door frames.
750 ml - foam output up to 45-50 l - two or two and a half standard door frames.

Here are a few tips that will help make it easier to work with mounting foam and get the desired result.

Preparation for use. Since the polyurethane foam sealant in the cylinders hardens under the influence of air humidity, it is advisable to additionally moisten the surface with water before application: the expansion and the rate of foam solidification (polymerization) will increase.

When working with polyurethane foam is carried out at sub-zero temperatures, the treated surfaces must be cleared of ice and frost.

Before use, the bottle should be shaken well for about a minute and warmed up (without using open flame! Flammable!) to room temperature (from +10°С to +25°С). These measures significantly increase the yield and density of the foam.

If you plan to process window and door frames, additional spacers must be installed in them to prevent distortion, which should not be removed until the foam has completely cured.

Usage. When spraying, the container must be held upside down, otherwise all the air will come out and the container will remain without pressure, thereby becoming unsuitable for use.

The joint is filled from bottom to top with uniform V-shaped movements, leaving about half the volume of the gap for the foam to expand.

Cavities deeper than 50 mm are filled in several stages, waiting for each layer to dry.

Keep in mind: despite the fact that mounting foam has strong adhesive properties, it is not designed to work with polyethylene and silicone surfaces. It simply does not stick to these materials.

After application. Uncured foam from clothes and other items can be removed with acetone or a specially designed cleaning agent.

The average time for the initial drying of the foam (can be touched) is about 10-20 minutes. The foam finally hardens in 4-6 hours, this time directly depends on the temperature and humidity of the surrounding air.

Excess, protruding fragments of foam can be cut off with a knife.

The cured foam does not withstand exposure to sunlight, therefore, during outdoor work, after the final hardening, it must be additionally protected with paint or plaster.

Additional Precautions

• Uncured foam irritates the skin, respiratory tract and eyes. Therefore, during work, you need to use protective gloves and goggles, with insufficient ventilation and a high concentration of vapors - a respirator. Hardened foam is not harmful to human health.
• When purchasing foam, you can stumble upon a fake. How to avoid it? After all, mounting foam produced in artisanal conditions without observing the necessary technologies may not meet the generous promises of the label. Unfortunately, we constantly hear about the discovery of another warehouse of counterfeit goods. It is worth recognizing that there is no unique, trouble-free way to determine a fake. All sorts of special signs and holograms are not a guarantee of quality, they are faked with great success by scammers, since these people learn about the mandatory presence of certain security signs on foam cylinders much earlier than us - consumers. It remains to use the general recommendations that are suitable for most consumer goods, namely:
  • ask the seller to show a certificate of conformity for this product;
  • look at the printing quality of the label or the quality of the image applied directly to the container. Since fakes are often produced at minimal financial cost, little importance is attached to the quality of printing. Therefore, the label (canister with the image) looks sloppy, and often a shift of colors is visible to the naked eye, due to which small text becomes fuzzy;
  • pay attention to the date of manufacture (usually the expiration date of the foam is one year from the date of issue) - the expired polyurethane foam has most likely already lost all its valuable qualities.

Who produces it?

Our market is currently full of all kinds of mounting foam, but this does not mean that all the products offered are of high quality. A lot of polyurethane foam that does not meet certain requirements enters the shelves of shops and especially markets: for example, when gases harmful to the ozone layer are used as a propellant. Or there are cases when manufacturers simply do not add mounting foam to cylinders.

Unfortunately, many Russian merchants (fortunately, not all) put the price in the first place, and not the quality of the foam sold. Yes, and our consumers "help" them in this. After all, an ordinary buyer has practically no idea what the foam should be like (how much it should be in a cylinder, what quality ...).

In domestic conditions, the need for special tools does not always arise. If you suddenly need to repair the seal or insulation in a small area, and there is no foam gun at hand, you can try to do without it. This will help you avoid unnecessary expenses. However, you should first find out how mounting foam behaves without a gun and how to use it correctly.

There are two classes of mounting foam:

• domestic;
• professional.

According to the technical characteristics, both types of materials are similar, however, differences still exist. First of all, it should be noted the volume of the cylinders. So, household foam is usually offered in small quantities (up to 800 ml). The kit includes a small piece of tubing with a small cross section. The pressure level in the tank is relatively low. This allows you to reduce material consumption in cases where you plan to use a foam bottle without a gun.

Professional material can be bought in volumes from 1.5 liters, in addition, it is used for large-scale tasks: sealing the seams of window and door openings, sealing large gaps. The foam is contained under high pressure, so it is very difficult to apply it correctly without a gun. There is one more nuance. So, the outlet of a professional cylinder is equipped with a fastener: a threaded cap (bayonet). At this point, the gun is installed.

Subtleties of application

First you need to determine what type of material to use: household, professional foam. If you plan to process a large area, you need to take into account the volume of the cylinder. Household-class products from some manufacturers are sometimes of poorer quality than their professional counterparts. For this reason, for more serious tasks, it is better to choose the latter option. Possible ways to apply foam without a gun:

• Professional grade material is used, for which the tube is used. You should be prepared for the fact that under high pressure the foam will come out in excess.
• Use household material, fixing a tube on the valve, which is equipped with a balloon.
• Professional foam is used by attaching two tubes of different sections: first a larger one, then a smaller diameter tube is inserted into it and well fixed. This will reduce material consumption.

Preparation for work

The site to be processed must be put in order. Having figured out how to work with mounting foam without a gun, perform simple manipulations:

1. Remove any dirt: dust, dirt. If the gap is quite large, it is pre-filled with foam, which will provide improved thermal insulation qualities in this area and will reduce foam consumption. Using a material such as foam, it is recommended to seal gaps no more than 8 cm in width.
2. The site is moistened with water, for which it is better to use a spray gun, then the surface will be moistened evenly.
3. Control the environmental conditions. Work is best done at an air temperature of +5 to +20 degrees. The maximum upper limit is +30 degrees. But in cold conditions, another type of mounting foam is used - frost-resistant.

The procedure must be carried out in protective equipment. Gloves and goggles are usually sufficient.

Tip: If the material contains toluene, you should also wear a respirator.

Instructions for applying foam without a gun

The principle of work is similar to that when using a special tool. If mounting foam will be used without a gun, how to properly use the tube that comes with the kit? Step-by-step instruction:

It takes an average of 8 hours to fully cure the foam. Do not worry if, after this period of time, swelling appears on the treated area. They can be cut with a clerical or ordinary sharp knife.

Tip: After drying and removing excess foam, be sure to cover it with putty or other material, otherwise the composition will gradually collapse under the influence of sunlight.

Disadvantages of the foam application process without a gun

When deciding which method to choose, you need to consider both positive and negative points in each of the cases. Of course, the use of a specialized tool greatly simplifies the task. But the process of sealing with a tube without a gun has its drawbacks:

• Large consumption of material. It is necessary to control the intensity and duration of pressing the valve. And still, significant pressure contributes to the appearance of an excess amount of foam. As a result, 2-3 times more material is required per area, while professional foam is consumed less intensively. This factor determines the financial costs - they increase.
• If you plan to use professional foam, you need to remember that it will not always be possible to install a tube. Simply the balloon will not give out foam.
• Waste of time. It will take more time to hold the flexible tube in the correct position, and with it the cylinder valve. In addition, you need to remember the need to constantly monitor the amount of foam that appears at the exit. If the use of a gun makes it possible to complete the sealing in 10-15 seconds, self-treatment without a specialized tool will take about 15 minutes.

There is one more nuance. So, disposable mounting foam should be purchased in the right amount, which will avoid unnecessary expenses, otherwise the rest of the material will simply be thrown away. For this reason, it is sometimes easier to buy a small volume can and fill the gaps with foam using the tube that comes with the kit.

Polyurethane mounting foam is an excellent sealant and insulation. It is used both for the installation of such large-scale structures as doors and windows, and for the repair of minor defects. This material is used to patch various cracks and crevices, restore tightness at the joints, and even make other building materials. Foamed polyurethane is quite easy to use, but you need to follow certain rules for working with it, be quite careful so that the seam is even and lasts a long time.

Peculiarities

The hardened polyurethane foam is an elastic solid material of a yellowish-white color. This very light substance has excellent heat and noise insulation performance. It very quickly loses its properties under the influence of ultraviolet radiation, therefore it is mainly used indoors.

Such foam has a number of advantages that favorably distinguish it from other materials:

• increased moisture resistance, high rates of sound and heat insulation;
• low current conductivity, which allows it to be used in the installation of electrical networks;
• many types of foam are resistant to fire, which allows expanding the scope of its application;
• after exiting the cylinder, such foam expands in volume and fills even those microcracks into which it is impossible to insert the gun tube;
• polyurethane can be used to glue surfaces made of different materials, such as wood or brick;
• the foam is completely non-toxic, while being resistant to chemical attack.

Almost all of the above properties must be specified by the manufacturer in the appropriate certificates, which can be requested from the seller.

The following information should be printed on the packaging itself:

• foam expansion volume. It can be from 10 to 300%, but most often, in fact, the foam still turns out to be somewhat less, since this percentage is indicated for ideal conditions;
• its viscosity;
• the volume of the container itself.

Most often, all these characteristics depend on the type and purpose of the foam, so you need to know which polyurethane and what it should be used for.

Release form

All types of polyurethane insulation differ in several criteria.

Depending on the method of application and the form of release, they can be of two types.

• Professional foam is produced in special cylinders that are inserted into a plastic gun with metal clips. Such a gun allows you to use polyurethane economically and in equal portions. The main thing is to thoroughly rinse the device after use so that the remnants of the substance in it do not freeze.
• Household foam packs are equipped with a small tube instead of a gun, which is put on the lever. It is not suitable for large repairs, but it will perfectly cope with minor flaws.

Depending on what time of the year and at what temperature the polyurethane will expand and solidify, the following types of mounting foam are distinguished:

• summer - used at temperatures from +5 to +35 degrees;
• winter - used at temperatures from -18 to +35 degrees;
• universal - it costs much more, but it can be used all year round.

It should be noted that the temperature ranges are indicated not for air, but for the surface on which the composition will be applied. The lower its temperature, the less will be the expansion of the finished layer.

In addition, foam may vary in types depending on the flammability class:

• B3 - combustible substance;
• В2 – self-extinguishing substance;
• B1 - refractory compositions.

Finally, mounting foams differ in composition. They can be one- or two-component. However, the latter type of foam is so difficult to handle that it is practically not used for private construction and do-it-yourself renovation of the premises. Two-component foam hardens in a quarter of an hour and there is practically no time left to eliminate defects, therefore only experienced professional builders use it.

Scope of application

Most often, mounting foam is used in the process of installing windows and doors, laying electrical wiring and pipelines. Due to the high thermal insulation in this way, it is possible to foam seams and recesses in cooling and heating systems, cracks in the roof and when insulating the surface of walls, floors or ceilings. It perfectly fastens wall panels and foam boards, providing excellent waterproofing. It is applied outside steel baths or cast iron baths to reduce heat transfer from the metal when the bath is filled with hot water. With the help of polyurethane, you can insulate the space behind the sheathing of PVC panels. In almost half of the repair processes, it remains an indispensable material.

In order to avoid any problems both with minor and major repairs of your own house or apartment, you need to be able to use both professional and household mounting foam. To work correctly with the first, you must correctly install and use a special construction gun.

Gun installation includes the following steps:

• to begin with, the foam balloon is heated in warm water to room temperature, after which it is vigorously shaken for 30 seconds. This will give the polyurethane a homogeneous state, which will allow it to exit the cylinder smoothly and in full;
• the protective cap is removed from the upper container of the gun, it is turned with the handle down and the cylinder is screwed into it. The container is screwed in with force until a hiss appears, which means that the mixture has begun to flow into the tool;
• if the gun was previously used and was not washed well, then hissing will not be heard and you will have to purchase a new tool;
• the system of connected elements is shaken strongly a few more times, turn the adjustment screw a quarter of a turn and, holding the trigger, begin to apply.

Working with such equipment does not require specific skills, but will require considerable dexterity if this is the first time.

Applying foam from a gun is carried out as follows:

• first you need to clean the work surface from dust and dirt, then lightly wet it with a conventional sprayer, since the foam interacts better with a wet surface;
• the tool nozzle is directed to the surface;
• foam is supplied in the right amount by smoothly pressing the trigger;
• to pour the composition into a vertical recess, it must be applied from the bottom up;
• wide spaces are filled with zigzag movements by no more than a third of the volume, since the foam expands greatly in air;
• it is better to supplement the area after than to cut off the excess of the solidified substance.

The gun barrel is quite long by itself, but in order to glue materials in hard-to-reach places, for example, to fill the voids between a false wall, you should additionally purchase an extension hose that is put on it.

Despite the fact that the packaging most often indicates a hardening time of up to 8 hours, in fact this process can take up to half a day. After complete solidification, the excess is cut off with an ordinary clerical knife or a metal file.

Unlike a handy construction gun, household polyurethane foam is equipped with just a small PVC tube, which is put on the adapter. In principle, the sequence of work itself is practically the same, however, more efforts will have to be made to fill the gap of the same volume. Such a tube is convenient for small volumes of work, because with it it is impossible to release the solution in equal portions. In addition, the balloon has to be constantly kept upside down, which is why the arm is constantly numb, so it is difficult to maintain smooth movements. If such a tube and adapter were not sold complete with polyurethane insulation, then you will have to buy them separately.

You will learn more about how to use mounting foam from the video.

Most often, mounting foam is purchased in the right amount at a time and after use, even if it is unfinished, it is thrown away. And also it is not bought in advance, as it has a limited shelf life. It is worth considering in more detail the nuances described below in order to be able to save.

Can it be applied multiple times?

It is widely believed among buyers that professional foam with a gun can be reused, but a household variety with a flexible tube, alas, is disposable and cannot be reapplied to the surface. Indeed, most often, if you leave the cylinder on the gun and block the trigger with a dispenser, the gun will not allow air to enter the cylinder and the composition will not harden. At the next use, it will be enough to remove the remnants of the hardened foam from the nozzle and you can start working again. However, exactly the same can be achieved from a household remedy. To do this, you need to start releasing the foam from the cylinder, but, without letting it go out, bend and pull the soft tube with a wire. The foam at its end will harden, but the fold will not allow air to penetrate further and spoil the entire volume of the substance. At the next use, the cured edge of the PVC tube is simply cut off and the foam is ready for use. The container can be stored in this form for no more than a few weeks.

The appearance of a new generation of windows in the modern construction industry has opened up wide opportunities for the use of modern polyurethane-based sealant - polyurethane foam. It is designed to connect various structural elements to each other. Installation of plastic windows is now no longer complete without building foam. Previously, the installation of windows was notable for the inconvenience and increased laboriousness of sealing due to the use of tow on cement mortar, which ignored numerous small inaccessible spaces. Mounting foam is able to fill them, thereby providing heat, sound insulation and sealing properties during installation. By filling voids and cracks in door and window blocks, water pipes, roofing materials and other building structures, polyurethane foam creates not only tightness, sound insulation by filling voids, but also reliable fixation of elements.

Features of mounting foam

Construction foam, as a rule, is stored in aerosol cans of various capacities, as it is a mixture of polyurethane substance and pressurized gas in a ratio of 3/1. In this proportion, the foam easily fills any voids, cracks, potholes.

The ability of the mounting foam to provide the structure with thermal insulation, tightness and resistance to various kinds of influences can be increased, provided that its feature is taken into account to collapse under the influence of direct sunlight.

The advantage of building foam is its relatively low cost. It is used with almost all building materials - concrete, wood, plastic, glass, brick. The exceptions are plastic, teflon, silicone, polyethylene. If, nevertheless, foam is applied to these materials, then their surface is pre-treated with acetone. Labor costs and time costs when working with polyurethane foam are insignificant due to its rapid polymerization.

Note! The disadvantages of mounting foam include its chemical base (ventilation of residential premises and the use of protective equipment - gloves, a respirator - when working with aerosol) are required), instability to ultraviolet rays and natural precipitation - rain, snow. Therefore, the slots filled with mounting foam must be covered with paint, sealant or covered with a casing.

It is also worth noting that the cost of an air gun for a foam cylinder is much higher than the cost of the cylinder itself, but thanks to its repeated use, it will pay for itself in a short time.

Mounting foam is one- and two-component. When spraying a one-component foam, a chemical reaction occurs with the formation of polyurethane foam, capable of transforming into a solid consistency in an environment with 35% humidity, the volume of which increases by 250%. The ambient temperature should vary between +5-+35 degrees Celsius. Ideally, the air temperature should be 20 degrees, air humidity - 60-80%.

Note! There are types of specialized foam, which is used in winter conditions (at sub-zero temperatures), but under the main condition - sufficient air humidity. Otherwise, the mounting foam will not harden.

Operating principle

Before understanding how to apply mounting foam, it is important to know the principle of its formation. In an aerosol can, mounting foam is contained in the form of polyurethane ingredients, which are placed in the center of the container. In its lower part are diisocyanates, in the upper part - gas. The main condition for the use of the contents of the container is the mixing of the components, therefore, before applying the mounting foam, the can should be thoroughly shaken. Under the influence of gas, the foam is forced out of the balloon, increases in volume due to the interaction of polyurethane and diisocyanates, and then absorbs moisture from the environment and hardens, forming a dense plastic.

Note! For hardening (polymerization) of the foam, at least 8 hours are required, for complete drying - 2 days. After drying, the foam gives some shrinkage of 5% or more (50% shrinkage gives household sealant). The smallest shrinkage (5%) allows foam applied with an air gun.

Surface preparation and material handling

Depending on the scope of work, preference is given to either mounting foam with a tube in the cylinder valve (“amateur”), or its application using an air gun (“professional”). According to the chemical composition, such foams are no different from each other. For sealing small gaps, an “amateur” package with a tube is suitable, which becomes unusable a few hours after use due to the foam hardened in it. "Professional" packaging with a special thread on the valve to connect the gun is important in case of a large amount of "fine" work, where accurate, economical dosing in hard-to-reach places is required.

When applying foam, the following procedure should be followed:

• Remove debris (chips, etc., old foam is removed mechanically) from the places where the foam is applied. Foam is used for gaps 2-8 cm wide. Gaps up to 2 cm are sealed with a different sealant, gaps wider than 8 cm are reduced.
• Moisten the surface on which the mounting foam will be applied with a spray gun, avoiding dripping moisture.
• The temperature of the foam can must be the same as the air temperature. To do this, the balloon is lowered for several hours into a container with water of the desired temperature.
• Shake the balloon for 1 minute for the foam components to enter into a chemical reaction.
• Apply foam from bottom to top with smooth movements for 1/3 of the gap. The cylinder must be in the upside down position.
• Deep cracks and large voids are filled with foam in layers or by 50% with breaks of 10 minutes for the foam to swell. The diameter of the foam jet is 1 cm. During the break, as well as during storage, the cylinder must always be in an upright position.
• After removing the gun from the cylinder, you need to clean them from the remaining foam using a special solution, apply technical vaseline to treat the screw, socket and gun muzzle.

After the foam has hardened, its excess is removed with a knife, the places of its application are protected from environmental influences with a layer of paint, sealant or putty, or covered with a casing.

Video

How to work with gun foam, see below: