... :1) Available materials: silicone, NBR, fluorosilicone, Viton (FKM), Viton DuPont and Dowelastomers, neoprene, HNBR, NBR + PVC, natural rubber, SBR, IR, IIR (butyl ... rubber),CR (neoprene), SBR, AU, ACM, CO, NSF-612) Excellent chemical and physical properties3) Customers' designs and specifications acceptable4) Available in ...