Finnish paint solvents NON-FAER (TIKKURILA) at high temperatures forms a foam protective layer, slowing the spread of fire within premises. Coatings and coating are pasty consistency, do not have any decorative properties and completely hide the wood structure, and therefore apply only in special cases. They can be used to protect sheds, attics and various technical areas, which is not subject to the requirements of decoration. Examples of such materials can be such formulations as "CPA" and "VMP-2" (Research Institute of Software of the Interior Ministry), superphosphate daubing "SFO" and cover "OPV-1" (Institute Gipronine-metallorud). Coatings, "CPA" and "VPM-2" is a mixture of heat-and gas-filling in aqueous solution of polymer binders, and the "VPM-2" and contains a fibrous filler. Both the composition intended to protect domestic timber. Superphosphate daubing "SFO" – a mixture of superphosphate with water, also used indoors.
Fire protection coating "OPV-1" is a mixture of exfoliated vermiculite and a liquid binder (liquid sodium glass or silikofosfat sodium). The main purpose of the product – fire protection structures operating in conditions which exclude the impact of precipitation and freezing temperatures. Flame retardants – flame retardant impregnating compositions based on aqueous solutions of salts (salts of boric acids, salts of phosphoric or silicic acid) and surface-active substances – the most widely used wood preservative. The action of flame retardants based on the melting of the fusible material or on an expansion in heating substances that emit gases that do not support combustion. In the first case of the heat expended on melting flame retardants, which increases the ignition temperature of wood, in the second – non-combustible gases released during decomposition of salts, prevent the spread of flames. One of the best fire retardant is diammonium phosphate, which when heated highlights of phosphorus oxides covering the wood with a protective film, and non-flammable gas (ammonia). Flame retardants are introduced into the timber impregnation in an autoclave or hot-cold baths, as well as a surface treatment by brushing or spray gun.