GREAT STUFF™ Fireblock Insulating Foam Sealant is a ready-to-use, minimal-expansion insulating foam sealant that fills and insulates gaps up to 3/4 inch to restrict airflow. This distinctly orange solution seals electrical wiring run through wall studs as well as service penetrations in walls and between floors to provide a simple, cost-effective way to maintain the continuity of an approved fire block material throughout the house.

Fireblock insulating foam sealant Reusable for up to 30 days with the Smart Dispenser(TM) No drip dispensing eliminates mess Easy to use, with greater control Impedes spread of fire and smoke through service penetrations Forms a long-lasting, weathertight seal to minimize drafts Tested according to ASTM E84, ASTM E814 (modified), UL 1715 Seals service penetrations between floors Seals electrical runs through wall studs Tack free in 5-15 minutes 340 g (12 oz) NOTE This product is not fire-resistant. It is combustible and can NOT be use in Fire-Stop applications