Other fire block foams are available, but they merely meet minimum testing standards. Touch 'n Foam® Fire Break® is a flame resistant all purpose, class A fire retardant foam sealant that exceeds testing standards. Fire break is self-extinguishing and works by eliminating oxygen flow in service penetrations, where fire spreads most quickly. Using Fire Break® in these penetrations blocks air infiltration, which means fire will take longer to burn through to adjoining rooms, giving you valuable time to get to safety.