Tried and tested fire protection. Ready-to-use, 3M™ fire barrier watertight sealant 3000 WT is an intumescent, silicone elastomeric sealant. This gun grade sealant cures upon exposure to the atmosphere to form a monolithic flexible firestop seal and, when properly installed, this product provides up to 4-hour fire protection in tested and listed systems. This sealant is watertight to help prevent the intrusion of moisture. It is an ideal choice for CPVC piping. 3M™ formulated this sealant to help prevent the spread of Fire, smoke and noxious gas and firestop joints and through-penetrations through floor slabs, walls and other fire-rated building partitions and assemblies. Recommended applications metallic pipes non-metallic pipes (e.g. Plastic) conduit, power and communication cables. cable trays busways combos insulated pipe. HVAC duct penetrations fire Barrier. Features 3M™ fire barrier watertight sealant 3000 WT acts as an acoustic barrier by minimizing noise transfer (STC-Rating of 53 when tested in a STC 54-rated wall assembly). In addition, the high solids formula produces limited shrinkage. This halogen-free sealant is sag-resistant and has an excellent caulk rate (applied with conventional caulking equipment). It dries to the touch in 30 and 60 minutes and can be painted. In addition, this sealant has been engineered to be re-enterable and repairable. Reliable and affordable fire Protection`Effective and easy to install, 3M™ fire barrier watertight sealant 3000 WT is part of the family of fire protection products that offer the broadest, long-lasting solutions for a variety of commercial, industrial and residential applications. As a trusted leader in the fire protection industry, 3M™ offers a broad line of affordable products designed to meet the most demanding firestop requirements. Find the solution you need from the industry preferred line of fire protection products.