Loctite Tite Foam is a new generation of polyurethane-based insulating foam sealant that expands to fill, seal and insulate gaps and cracks inside or out. It is a white polymer foam based on purified and concentrated ingredients that provides 4X more density vs. conventional foams for better durability and insulation. It is easy to use and apply with its attached straw applicator and provides a quick durable seal from the elements. Loctite Tite Foam Insulating Foam Sealant has excellent adhesion on most building materials like wood, concrete, stone, metal etc. Product does not contain CFC-propellants. Use for filling gaps and cracks and sealing around wiring and plumbing penetrations, HVAC ductwork, basement and crawlspace drafts, sill plate and rim joists, attic hatches, under baseboards, gas line penetrations and outside water faucets. Can also be used to seal out drafts and moisture as well as keeping out pests and bugs. For Best Results: Tite Foam is not a fire stopping material and should not be used in areas that require fireproof or fire stopping materials. Despite significantly higher UV resistance, it is still recommended to protect the foam from UV