Difference between cellular rubber and sponge rubber
Cellular rubber and sponge rubber are often confused, the difference is due to the different manufacturing processes in the material properties. Sponge rubber has open cells and a dense outer skin. Due to the outer skin, sponge rubber is particularly suitable for applications involving increased mechanical stress and abrasion. However, if the outer skin is damaged by the foam rubber, it can soak up water. Cellular rubber has no outer skin, but cellular rubber has closed cells. Cellular rubber is therefore always water and airtight. Sponge rubber or cellular rubber are foamed rubber qualities (EPDM, SBR, CR, NBR) and can adapt very well to the substrate, which is why they are mainly used for seals
