Sumitomo Riko Develops Low-Density EPDM Hose With New Lightweight Reinforcement Material on May 29, 2017 in Products Sumitomo Riko Co. Ltd. (TYO:5191) recently debuted a low-density ethylene propylene diene monomer (EPDM) hose made from the company’s newly…... Membership Required You must be a member to access this content.View Membership LevelsAlready a member? Log in here Continue Reading