Rectorseal 66640 10.3-Ounce Cartridge Metacaulk 1000 Intumescent Firestop Sealant

One component, general purpose fire rated sealant and smoke seal for construction joints and through-penetrations. Extremely intumescent, non-sag caulking grade sealant. Cures to an elastomeric seal that is suitable where dynamic movement is expected. 10.3 ounce covers about 18 cu. in.