... function 3Waterproof, anti-fire,heat,oil resistance Rubber capProduct all kinds of Rubber cap Good quality and best prices 1. ... for Silicone, NBR, VITON (FKM), Neoprene, HNBR, Natural rubber, ACM EPDM, etc3. All manufacturing processes confirm to the ISO9001 ... , ozone resistant, UV resistant, aging resistant, weather resistant, good insulation property, anti-toxic, good air-permeable, etc.5. Hardness: ...