Manufacture of asbestos rubber gasket material chrysotile asbestos, blue asbestos (crocidolite) two kinds. Chrysotile asbestos is serpentine, its main ingredient is written containing about 13% water of crystallization of magnesium silicate, which heat and alkali resistance, high tensile strength, acid resistance is poor, most asbestos rubber pad tablets are produced by them mouth blue asbestos are amphibole asbestos, the main component containing about 2.5% a 3.5% water of crystallization of silicate, magnesium oxide component is minimal, accounting for about 18% of an oxide of 24%. Blue asbestos is not only good heat resistance, and acid resistance is good, so much acid is used in the manufacture of asbestos rubber gasket.