Great Stuff Pro Pestblock Foam Sealant prevents pests from entering your home by sealing gaps, cracks and holes where they commonly enter the home. It is specially formulated with a bitter ingredient and prevents unwanted critters from entering your home by creating a barrier and eliminating points of entry. For additional protection, insert Copper Mesh into openings before sealing to prevent critters and varmints from chewing through. Features and Benefits: Fills, Seals and Insulates gaps up to 3"; Forms a Water-Resistant, Airtight Seal; Bonds with most building materials and surfaces; Trimmable, Sandable and Paintable; Tack-Free in 6 minutes Interior/exterior use; Precise application with no mess; and Stores easily for use on future projects