Buy Insulation Products.com carries a wide range of pipe insulation mastics online for both homeowners and professional insulators. Insulation mastics are commonly used to create a protective layer over insulation system components. Various types of mastic sealers can provide weatherproofing or fire-resistant properties as well as mechanical protection. We offer mastics only from leading brands such as Foster Products and Childers. Besides insulation mastics we also sell mastic accessory items such as rolls of fiberglass mesh, brushes/trowels, canvas rolls, and more. Browse our selection of mastic duct sealants below or contact us to learn more.