https://www.ebay.com/sch/i.html?_nkw=3M+Red+Brown+Fire+Barrier+Sealant+5+Gal+&_sacat=0&_dmd=2

3M Red-Brown Fire Barrier Sealant,5 Gal.

Regular price
$458.00
Sale price
$331.00

Firestop Sealant, Red-Brown, Container Type Pail, Size 5 gal, Up to 4 hr. Fire Rating, Cable Trays, Cables, Ducts, Insulated Pipe, Metal Pipe, Plastic Pipe, Application Method Trowel, Material Intumescent, Standards UL Listed, Fire Barrier Sealant