Royalene 501 Ethylene-propylene diene terpolymer Crompton-Uniroyal Chemical Rubber - Elastomer >> Ethylene-propylene diene terpolymer, EPDM ROYALENE ® 501 "A Fast Curing Low Mooney Polymer for High Quality Mechanical Goods " Easy Processing Fast Curing Exceptional low temperature properties Resistant to oxygen, ozone and heat High Quality Mechanical Goods Press Molded Sponge Coated Fabrics Royalene® 501 EPDM is a terpolymer of ethylene, propylene and a non-conjugated diene (ENB). This low Mooney, fast curing, easy-to-process grade also offers very good low temperature properties. The primary applications for Royalene 501 are high quality mechanical goods and press molded sponge. It is also used in blends with butyl rubber for inner tubes. Non-staining, fast curing ethylene-propylene diene terpolymer (EPDM). Provides low Mooney viscosity, easy processing, very good low temperature properties, resistance to oxygen, ozone and heat.