Nitrile, Butyl, Epdm, Gum Rubber, Neoprene, Viton, Cloth Inserted, Rubber, Silicone, Nylon, Polyethylene, Polypropylene, Styrene, Santoprene, Vyram, Geoflast, Teflon. Custom gaskets available. ESTCO has thousands of gasket models in-stock. We also provide custom gaskets made to fit to your specification. Provide us with your print, material specs and quantities and wed be happy to quote.