Epdm seal, excellent comprehensive performance, with outstanding ozone resistance, excellent weather resistance, good resistance to high temperature, low temperature performance, outstanding resistance to chemicals, able to withstand a variety of polar solutes, relatively small density. The disadvantage is in general mineral oil and lubricating oil expansion is large, generally for dark products. Operating temperature range -60~+150℃. It has been recognized by domestic and foreign enterprises for its wide range of applications and excellent comprehensive performance.