Rubber Seal: A rubber seal can be produced in any desired rubber grade. In a foodgrade or in a grade that is resistant to seawater or chemicals. Ridderflex has a large stock of various rubber grades, such as: EPDM, Neoprene, Nitrile (NBR), SBR, Para Rubber, Silicone (VMQ) and Viton® (FKM). But we also have many grades of cellular rubber, sponge rubber and foams in our product range. View our full range of rubber for the availability of the materials.