We carry a wide range of pipe and insulation mastics online for homeowners and professional insulators. Insulation mastics are commonly used to create a protective layer over insulation system components. Various types of mastic can provide weatherproofing or fire-resistant properties as well as mechanical protection. We offer mastics from leading brands, as well as accessories such as fiberglass mesh, canvas rolls, and more. Browse our selection of mastic duct sealants below or contact us to learn more.