Material: silicone, EPDM, nitrile, neoprene, Viton, SBR and NR Rubber Seal :1) Material: silicone, EPDM, nitrile, neoprene, Viton, SBR and NR2) Special rubber seals can be made from extrusion rubber profiles and then be joint by moulding and RTV3) Square rings, quad rings, back-up rings, V-rings, T-seals, wear rings, piston and rod seals available