Fire-retarding composition S-21 based on organic solvents. The composition flame-retardant effect is based on the formation of a thick layer of expanded foam (foam coke) with low thermal conductivity on painted material surface at high temperature.
Fields of application
The coating based on the S-21 composition is used as protection against open fire or other high-temperature effects of steel beams, supports, building structures for industrial and civil purposes, including those operated indoors with non-aggressive or slightly aggressive environments, in order to increase their fire resistance limit as well as for operation in atmospheric conditions when using a finishing coating.
Primers such as ГФ-021 (ГОСТ 25129-82 or ТУ 2312-008-20514586-04), primer Eppex ТУ 2312-032-20514586-2015 or ALURON ТУ 2312-016-20514586-2009 materials should be used to form anticorrosion coating or good adhesion to metal. Polytex ТУ 2312-024-20514586-2013 materials are recommended to use as finishing coating.
The consumption and thickness of the layer of the applied flame retardant coating depend on mass factor and the rate of flame retardant efficiency.
Instruction for use
Before applying the enamel rust must be removed from the metal surface by any available method (metal brushes, sandpaper or sandblasting). Then the surface is degreased with organic solvents and dried at a temperature close to 20о С for 2-3 hours. The metal is coated with an anticorrosive primer with a dry layer thickness of at least 50 microns, drying the primer layer for 24 hours at a temperature of 20о С and a humidity of no more than 80%. Next, flame retardant is applied layer-by-layer with inter-coat drying for 24 hours.
The surface temperature should be at least 3 0C above the dew point to avoid condensation.
The process of applying
Ready to use. Thinning with formula thinner RP-1K,RP-1KF or toluene to painting consistency is possible when needed.
Thinning: 0 – 10%
Nozzle diameter: 0,027"-0,030"
Initial pressure:180-200 atm
Use for small areas
Formula thinner RP-1К, RP-1KF, toluene
Formula thinner RP-1К, toluene
Wash the tools after using immediately. The frequency of washing depends on the amount of sprayed material, the temperature and the time since the shutdown, including any time lag.