This specification covers an ethylene propylene elastomer in the form of molded sheet and shapes, color coded purple per ARP1527. Primarily for parts such as tube supports, grommets, clamp cushions, and gaskets requiring resistance to phosphate ester hydraulic fluids, but usage is not limited to such applications. This material is not suitable for use in contact with hydrocarbon fuels and oil or diester lubricating oils. Each application, however, should be considered individually.