Western polyrub viton sponge extrusion and Sheeting in a range of thickness and length and strip with or without Viton Sponge – Viton Sponge Sheetingself adhesive backing. FKM Sponge is resistant to corrosive attack from a wide variety of chemicals and fluids. It delivers robust protection against Oils, Fuels, Lubricants, Most mineral acids and fire resistant hydraulic fluids.