The density of sponge rubber is one particular-3rd that of foam rubber. This can be attributed to sponge rubber becoming made up of organically-derived components, even though foam rubber is made up of petroleum-derived components. Relevant:foam foam cutter upholstery foam scorching wire foam cutter silent basketball styrofoam cutter gun circumstance https://rubberfoamsheets40627.weblogco.com/33924436/the-greatest-guide-to-water-proof-rubber-foam