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Santopreneâ¢ (TPV) is a thermoplastic vulcanizate. Santoprene is fully dynamically vulcanized ethylene propylene diene monomer (EPDM) rubber in a thermoplastic matrix of polypropylene (PP). It looks, feels and behaves like rubber but, due to the PP content, offers simple, flexible part design and manufacturing.
R4271-N/R4471 - Neoprene/EPDM/SBR Blend. A slightly more dense version of the R4261 material with much of the same product attributes. This cellular rubber is a low density high compression set material designed to offer the best combination of economies and performance.