EPDM Trade names: Nordel Royalene Uniroyal . EPDM: Perfect for water transmission systems. Meets ANSI/NSF Standard 61. Ethylene Propylene is a copolymer F ethylene and propylene. Ethylene-propylene-diene rubber is produced using a third monomer and is particularly useful when sealing phosphate-ester hydraulic fluids and in brake systems that use fluids having a glycol base.Good temperature range. Temperature range: -65o to 300o F Color is black.