Fire-resistant foam is used when there is a need to make insulation, which will be exposed to fire during operation.
Fire Resistant Foam Characteristics
Mentioned mounting foam is a one-component sealant made on the basis of polyurethane foam. After acquiring it, you can immediately use it. During application, its components polymerize by interacting with moisture particles that are contained in the external environment. Fire-resistant foam has among the ingredients special substances that guarantee excellent acoustic as well as thermal qualities. The formed layer is completely impervious to gas and smoke.
Foam features
Fire-resistant foam does not burn under direct exposure to fire for the time specified by the manufacturer. After application does not drain down, even if it appears on a vertical surface. Among its positive characteristics, one can single out the ability to completely fill the spaces of any form. It adheres perfectly to brick surfaces and bases made of wood, polymers, cement, steel and glass.
The material well resists the effects of water and mold, has the ability to undergo temperature extremes ranging from -60 to +100 ° C. Quite often, builders and home craftsmen compare the described material with analogues that have traditional qualities. In this fight, the first foam option emerges as the winner; it is more durable and reliable.
Fire-resistant foam can have a different period until ignition. For example, Soudal brand material will not burn for 360 minutes when exposed to direct flame. Foam has the ability to extinguish itself. This indicates that the foam is flammable, and if direct fire begins to affect it, it will not form hot droplets. At the moment the flame is removed, the foam will die out on its own. As one drawback, sensitivity to exposure to sunlight can be highlighted . That is why foam suggests the need for protection after solidification.
Application Rules
Fire-retardant mounting foam should be applied to a surface whose temperature is in the range from +5 to +30 ° C. The working temperature of the internal content of the cylinder should not go beyond +10 to +30 ° C. In order to prepare the foam for use, it it must be kept at room temperature, however it cannot be heated. It is recommended to store cylinders indoors, with the neck up.
Polyurethane fire-resistant polyurethane foam must be well shaken before application. Then you need to analyze how well it comes out of the cylinder. After stabilizing the output, it is permissible to start working. In order to achieve better adhesion, it is necessary to moisten the working surface with water. However, there should be no drops on the surface. Cavities do not need to be filled more than 1/3. After a day, the foam should gain its final strength. It is recommended to close it with plaster or sealant, which has the qualities of fire resistance.
Foam cost
Depending on the manufacturer and special additives, B1 fire-retardant mounting foam can cost differently. The price is affected by the region of sale. So, a cylinder in which 750 ml of the composition can be purchased for 350 rubles.
Foam should not be applied in excess. First of all, this will lead to cost overruns and will entail labor costs aimed at eliminating excess after solidification. After all, the material is increasing in size. Therefore, before starting work, it would be nice to try to apply foam on a small area.