Common materials for oil seals are: nitrile rubber, fluorine rubber, silicone rubber, acrylate rubber, polyurethane, PTFE, etc. Nitrile-butadiene rubber (NBR) has good heat resistance and wear resistance, and is resistant to various lubricating oils, greases, oil and gas mixtures, etc., and is suitable for temperatures ranging from -30 to 120 degrees Celsius. It is used in gear oils of extreme pressure additives and has stable performance in gasoline and low aniline point mineral oils.