GREAT STUFF™ Fireblock Insulating Foam Sealant is a ready-to-use, minimal-expansion insulating foam sealant that fills and insulates gaps up to 1 inch to restrict airflow. This distinctly orange-colored foam seals electrical wiring run through wall studs as well as service penetrations in walls and between floors. *Intended for use in residential application to maintain the continuity of an approved fire block material
- Approved Fireblock penetration sealant 
- Impedes spread of fire and smoke through service penetrations 
- Reusable for up to 30 days 
- UL Classified - Bright orange in color for easy code identification 
- Tested according to ASTM E84, ASTM E814 (modified), UL 1715 
- Smart Dispenser™ provides precision, control, reusability 
- Adheres to wood, metal, masonry, glass and most plastics 
- Forms a long-lasting, airtight and water-resistant barrier 
- Tack-free in 5-15 minutes; trimmable in one hour