3M Fire Barrier Ultra GS Wrap Strip, 2 in x 40 ft

Graphite-based firestop is intumescent for thermal insulation (Intumescent material effectively firestops non-metallic penetrants) Excellent flexibility for easy installation around through-penetrants Easily rolled out, cut and shaped with common tools Re-enterable material saves time and money after installation Firestop tested up to 4 hours in accordance with ASTM E 814 (UL 1479)