We are offering here the Closed Cell Sponge Rubber that is a sponge formulation that is manufactured with a continuous skin on both sides. The skin makes the sponge stronger and more tear resistant. Even when the skin is punctured or cut, the sheets will not allow passage of air or fluid between cells. Their high performance for water sealing in outdoor environments has helped solve tough engineering challenges. The Closed Cell Sponge Rubber is very efficient and made for commercial applications.