Details Firestop tested up to 3 hours in accordance with ASTM E 814 (UL 1479) and CAN/ULC S115 Fire resistance tested up to 4 hours for construction joint systems in accordance with ASTM E 1966 (UL 2079) Engineered to provide optimum adhesion to a wide variety of construction materials Compression and extension capability of ±13% Offers excellent caulk rate and applied with conventional caulking equipment Durable sealant provides excellent weatherability during construction Formulated as a re-enterable and repairable solution 3M Fire Barrier Silicone Sealant 2000+ is an elastomeric, ready-to-use, single-component, neutral-cure silicone sealant that cures upon exposure to atmospheric humidity. We designed this sealant to form a flexible firestop seal that also acts as a barrier to airborne sound transmission. This product is firestop tested up to 3 hours in accordance with ASTM E 814 (UL 1479) and CAN/ULC S115. Tough and Flexible Firestop Sealant Formulated to provide up to 4-hour fire protection, 3M Fire Barrier Silicone Sealant 2000+ is an elastomeric, single-component, neutral-cure silicone sealant. This ready-to-use sealant cures upon exposure to atmospheric humidity and forms a flexible firestop seal for construction joints and through penetrations in fire-rated assemblies. 3M Fire Barrier Silicone Sealant 2000+ is firestop tested up to 3 hours in accordance with ASTM E 814 (UL 1479) and CAN/ULC S115, as well as fire resistance tested up to 4 hours for construction joint systems in accordance with ASTM E 1966 (UL 2079). We engineered this silicone sealant to provide ±13% compression and extension capability. This flexible firestop sealant is re-enterable and repairable, exhibits exceptional adhesion and bonds to most common construction materials and provides excellent weatherability during construction. Recommended Applications Dynamic and static construction joints Firestop blank openings Penetrating items that pass through fire-rated floor or wall assemb