High-speed vulcanizaion at room terperrature, thixotropy, stagnation, have good performance of aging resistance, good oil, water, diluted acid, diluted alkali resistance high and lower temperature resistance, the sealant can be used at -60C!250C(650F) with good seal, antiknock characteristics and shock resistance. Used for seal of cover joint and power-generating equipment plane flanges, automobile, motorcycle, pipeline.