Characteristics and applications of B2 class flame retardant foam caulking agent

foam caulkwe are no strangers, but everyone is familiar with b2grade flame retardantfoam caulkingnot much is known about this kindfoam caulkappearance and othersfoam caulk it’s not different, and the usage techniques are the same as ordinary ones. it’s just that the flame retardant level after curing is different. that’s whyb2level flame retardantfoam caulkhas attracted much…