2 in x 4 in x 9 in 3M Fire Barrier Pillows

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. We also engineered this product to be re-enterable and re-useable for new or retrofit installations.

Features:
Firestop tested for up to 3 hours of protection in accordance with ASTM E 814 (UL 1479)
Expands to form a hard char that tightly seals against flame spread, smoke and toxic gases
Re-enterable and re-useable for new or retrofit installations
Graphite-free composition does not conduct electricity
No wire mesh required and easy to install, inspect, remove and reuse as needed
Excellent aging properties for long-lasting durability and performance