EVM is an ethylene-vinyl acetate copolymer with excellent heat resistance, second only to silicone rubber and fluororubber, and can be crosslinked by reactive extrusion or by pre-crosslinking radiation using a small amount of peroxide, the vulcanizated rubber has high temperature resistance up to 175 °C, and it also has weather resistance, ozone resistance, coloration, and aging resistance. Its vinyl acetate content is usually between 40% and 90%. Copolymers with high vinyl acetate (VA) content have higher damping properties at room temperature, while copolymers with low ethylene vinyl ester content have extremely high elasticity.