Sponge Products From open cell to neoprene and beyond, Grand Rapids Rubber has the types of sponge you need for your projects. VIEW OUR CAPABILITIES VIEW OUR PRODUCTS Product Categories Sheet Rubber Foam Hose Rubber Products Sponge Fabrics Fittings and Hose Accessories Tubing Belts Tapes Adhesives Material Handling Equipment CLOSED CELL SPONGE OPEN CELL SPONGE R10470M SILICONE SPONGE