Order this 3M Fire Block FB 136 Sealant РGray for delivery to your job site. Tested as a type V residential Fireblock to ASTM E 84 (modified). Durable caulk is heat-resistant (up to 240°F/115°C). Acts as a draft stop to help reduce air infiltration. Thermal insulator offers an R-value of 4 in. Р5 in. (25.4 mm) typical. FB-136 is ready-to-use (no mixing required). Tack-free in approximately 15 minutes. Meets International Building Code (IBC) and International Residential Code (IRC) fire blocking requirements. Features minimal shrinkage to help ensure longevity. Excellent adhesion that bonds to concrete, brick, metals, wood, plastic and cable jacketing. Sealant requires no special handling for routine disposal. Thixotropic material resists sag or run in vertical or overhead applications.