Great Stuff 12 oz. Fireblock Spray Foam Sealant

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" 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.