Passive Fire Protection's 3600EX Firestop Intumescent Caulking Seal's durable formulation adheres well to a variety of substrates, including concrete, metal, and wood, ensuring reliable performance in diverse construction applications. The 3600EX caulk is easy to apply, offering installers efficiency and flexibility during construction or retrofitting projects. Tested and certified to stringent fire safety standards, this product offers peace of mind to building owners, contractors, and occupants, enhancing overall fire protection measures in commercial, industrial, and residential settings.