Great Stuff Fire Block Foam Sealant Orange, 12 Oz.

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 In. to restrict airflow. This distinctly orange solution seals electrical wiring running 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.