3M™ Fire Barrier Block is a smoke, sound, and firestopping pre-formed foam units. Firestop brick is the right size to cover medium to large openings in wall and floor through-penetrations-- Simple to use. If a fire occurs, 3M™ Fire Barrier Block maintains a tight firestop against smoke and flames. Be sure to check out 3M™ Fire Barrier Plank as another option.
Size 2.36 in. x 5.12 in. x 7.87 in.
Fire Barrier Blocks, Plugs, and Planks
3M Fire Barrier Block