Sumitomo Riko Sees Strong Demand for Viscoelastic Rubber in Damping Applications on October 2, 2018 in Products Sumitomo Riko Co. Ltd. (TYO:5191) is looking to expand its sales of TRC Damper, a seismic control system for wooden…... Membership Required You must be a member to access this content.View Membership LevelsAlready a member? Log in here Continue Reading