3M FB-369 3" x 6" x 9" Fire Barrier Pillow

3M™ Fire Barrier Pillows are self-contained, intumescent products designed for use in through-penetration firestops, providing up to 3 hours of protection. This fire barrier pillow expands to form a hard char that tightly seals against flame spread, smoke and toxic gases. Pillows are also engineered to be re-enterable and re-useable for new or retrofit installations. Show More Show Less