3M, 10.1 OZ, Fire Block Sealant, 1 Component, Non-Combustible Draft, Smoke & Fireblocking Sealant, Designed To Resist High Temperatures & Smoke Passage In Non-Rated Construction, Use To Seal Interior Construction Voids & Maintain The Integrity Of A Fire Block, Can Be Easily Applied With A Standard Caulking Gun, Pneumatic Pumping Equipment Or Simply A Putty Knife &/Or Trowel, Adheres To Virtually Any Material, Including Wood, Masonry, Metal & Plastic, Gray In Color & Applies Like Conventional Caulk.