The 3M™ Fire Barrier Sealant 3000 WT is a ready-to-use, high-performance, single component, neutral cure, silicone firestop that also acts as a barrier to water leakage and airborne sound transmission. It provides up to 4 hours fire protection. 3M™ Fire Barrier Water Tight Sealant 3000 WT helps control the spread of fire, smoke and noxious gasses before, during and after exposure to a fire when installed in accordance with a listed through penetration or fire-resistive joint assembly. 3M™ Fire Barrier Water Tight Sealant 3000 WT meets UL Water Leakage Test, W Rating – Class 1 requirements for systems tested and listed in accordance with ANSI/UL 1479 & CAN/ULC S115 and is tested in accordance with ASTM G 21 standard practice for determining resistance of synthetic polymeric materials to fungi.