Cm4 - EPDM is a new type of environmental friendly rubber foam material; it's synthesized with Ethylene-Propylene-Diene Monomer as the main material. It has excellent resistance to weather, ozone, heat, acid and base, and vapour. It has outstanding color stability, electrical property, aging resistance, electrical insulation property, and resistance to ozone, as well as good chemical stability, so it can be used in EPDM hose, tire side, rubber runway, joint strip, tyre tube and automobile parts. Now it's widely used in the field of urban infrastructure construction, automobile industry, high-speed railway, rail transit etc.