3M™ Fire Barrier Sealant FD150+ is a ready-to-use, gun-grade, latex-based elastomeric sealant that cures upon exposure to the atmosphere to form a monolithic flexible firestop seal.When properly installed, this product provides up to 4 hours of fire protection in tested and listed systems and helps prevent the spread of fire, smoke and noxious gas. It remains elastomeric (compression/extension capability of 19%) and exhibits excellent adhesion to a full range of construction substrates. In addition, this product acts as an acoustic barrier by minimizing noise transfer (STC-Rating of 56 when tested in a STC 56-rated wall assembly), helps create a smoke seal for systems requiring the optional L-Rating, meets the intent of LEED green building program credits VOC environmental regulations,, meets International Building Code (IBC) and other key life safety building code requirements.