Get this Krylon OSHA Safety Orange Spray Paint, 12 oz. delivered onsite. Tested as a type V residential fire block to ASTM E 84. Durable foam is heat-resistant (up to 240F/115C). Acts as a draft stop to help reduce air infiltration. Thermal insulator foam offers an R-value of 4 in. – 5 in. (25.4 mm) typical. Fire block foam is ready-to-use (no mixing required). Tack-free in approximately 5 minutes. Expands up to 200% in volume to quickly and effectively seal openings. Meets International Building Code (IBC) and International Residential Code (IRC) fire blocking requirements. Features minimal shrinkage and sag-resistant formulation to help ensure longevity. Excellent adhesion that bonds to concrete, brick, metals, wood, plastic and cable jacketing.