Fluorine rubber pad: It has excellent corrosion resistance and stronger temperature resistance than ordinary rubber, and can be used in high-temperature media. Neoprene rubber pad: It has good oil resistance, solvent resistance, chemical media and other properties, but is not resistant to aromatic oils. Its characteristic is excellent resistance to weather aging and ozone aging. Natural rubber pad: It has certain acid and alkali resistance, but the usage temperature should not be too high. EPDM rubber pad: has good heat resistance and aging resistance.