... Rubber Cover Features: 1. Main materialEPDM, also can use Natural rubber, Styrene-butadiene rubber, Nitrile rubber, Butyl rubber,PU,Neoprene, Silicone rubber, Fluorocarbon, Chlorohydrine rubber and Methacrylate rubber ... on.3. Main performanceProbably the most water resistant rubber available.Has excellent resistance to atmospheric ageing, oxygen ... duro.Tolerence.Color.Quantity Molded EPDM rubber cover