Flame resistant all purpose, Class 1 fire retardant foam sealant that exceeds testing standards. Self extinguishing and works by eliminating oxygen flow in service penetrations, where fire spreads most quickly. Blocks air infiltration, which means fire will take longer to burn through to adjoining rooms. Meets UL 1715, UL94 V O, ASTM 814 E 84. Approved Fireblock Penetration Sealant. Fills and seals service penetrations. UL tested. Class 1 foam. Orange in color. (1) 12 oz. can will cover 411 linear ft. at 3/8" bead.