Rectorseal 66383 30-Ounce Cartridge Metacaulk 150+ Firestop Sealant

One component, general purpose fire rated sealant and smoke seal for construction joints and through-penetrations. No-sag caulking grade sealant. Cures to an elastomeric seal that is suitable where dynamic movement is expected. 10.3 ounce covers 18 cu. in.