Natural Rubber, Insoluble Sulphur, Plasticizer, Hydrocarbon Resin, Crystex Hs Ot, Magnasium Oxide, Silicone Emulsion, Butyl Rubber, Butyl Bk, Exxon Butyl, Ethylene Propylene Rubber, Synthetic Rubber, Silicone Rubber, Carbon Black, Insoluble Sulfur, Hydrocarbon Resin, Magnesium Oxide, Silicone Emulsion