Square sponge rubber Sponge rubber with square cross sections, available in either rectangular rubber sponge or foamed rubber strip and four square sponge sponge rubber Square section design for rubber seal, waterproof, dustproof, heat shockproof, etc. Due to the closed-cell sponge rubber, the outside surface is smooth. Suitable for use in a variety of industries such as Automotive, Oven Seal, Glass Edge Seal, Waterproof Seal, Shockproof Seal etc. Along with the raw materials with silicone EPDM NBR CR (neoprene) and NR meet the specific applications for each industry.