Mainly used in the sealing between engine sump tank and engine case, between case body and tank cap, of the contact surface of tube flange and vessel flange, and of watercraft machinery. According to different rubber sheet composite fiber, there are asbestos series, non-asbestos series and asbestos-free series. According to different sealing pressures, there are high, middle and low-pressure sheet gaskets. According to different sealing media, there are oil-resistant, water-resistant, and coolant-resistant gaskets. According to clients requirements, select materials from different countries and of different brands to process seal fittings.