Royalene 521 Ethylene-propylene diene terpolymer Crompton-Uniroyal Chemical Rubber - Elastomer >> Ethylene-propylene diene terpolymer, EPDM SEALANT >> Pre-formed tape / Gasket ROYALENE ® 521 " An Excellent Low Viscosity Polymer for TPO Products and Mechanical Goods " Low Mooney Viscosity Excellent processing characteristics Blends easily in all formulations Outstanding low temperature properties Excellent weathering Automotive parts such as brake system components Mechanical goods Press molded sponge Royalene® 521 EPDM is a terpolymer of ethylene, propylene and a non-conjugated diene (ENB). This low Mooney, fast curing polymer offers exceptionally easy processing. It is well suited for mill mixing. The primary applications for Royalene 521 are molded mechanical goods, brake components, pipe gaskets, and seals. It is also used for thermoplastic elastomer compounds and modification of thermoplastic resins. Fast curing ethylene-propylene diene terpolymer (EPDM). Provides low Mooney viscosity, very good processing characteristics, outstanding low temperature properties and very good weathering. Used for thermoplastic elastomer compounds and modification of thermoplastic resins. Applications : pipe gaskets, and seals.