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Intumescent coatings are paints wither water based or solvent based
applied by using brush, spray or roller. Intumescent coatings reacts to
temperature of 270to 300 Deg.C by swelling around twenty times their applied thickness and provides required insulation
Correct thickness of cementatious or intumescent material for a give fire resistance period is critical for achieving the desired insulation. Each piece of steel has varying heat sink characteristics. Although steel sections have their own specific Hp/A factor, thickness of insulation or material sprayed
will vary depending on the type of fire protective material used and where it is used on a beam or column.
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