MAGIC GASKET MAKER is a silicone RTV sealant and adhesive that will bond, caulk, seal, fasten, insulate, protect and repair many types of materials. Because it’s virtually unaffected by weather, temperature extremes, chemicals and aging, it offers unmatched performance even under the most severe operating conditions. This material also seals or replaces a wide range of cork, paper, asbestos, felt and metal gaskets. It works on flanges, cover plates, hose connections and threaded assemblies. Available in four colors: Black (most heat resistance). Red. Blue. Clear (least heat resistance).