White Lightning Fire and Smoke Blocking Adhesive Caulk, 10 oz, Cartridge

This premium silicone sealant is designed to block the spread of smoke and fire. It forms a water-resistant seal that will also resist smoke and toxic gases, ultraviolet radiation and ozone.

For use on: copper and other metal through-penetrations
Will withstand temperatures up to 300 ˚F
Resists cracking
Can be applied in temperatures ranging from
-20 ˚F to 122 ˚F