3M Fire Barrier Block B258, Maroon Color, Pre-Formed Foam, Easy Installation, Sound Buffering, 2.36 in x 5.12 in x 8 in
- TESTED AND LISTED: Up to 2-hours in accordance with ASTM E814 (UL 1479) and CAN/ULC S115
- TIGHT FIRESTOP SEAL: Pre-formed foam block maintains tight firestop seal to prevent fire, smoke and toxic gas transmission
- SUITABLE FOR MEDIUM TO LARGE APPLICATIONS: Fits medium to large openings in wall and floor through-penetrations
- NO CURE TIME: Can help complete projects more quickly
- PRIMER PAINT READY: Block is paintable with primer
- EASY INSTALLATION: Installation requires no special tools
- DESIGNED FOR VERSATILITY: Can be repaired and reused as needed, saving time and labor
