Feature

●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


Description

3M Fire Barrier Block B258 is a pre-formed foam block designed for easy installation to effectively seal larger openings against smoke, toxic gas and flame. It is simple to use and helps reduce sound transmission.