Because silica has good adhesion and high temperature stability, it is used in precision casting, that is silicasol casting. The shell of silicasol casting has the advantages of high temperature and high strength, dimensional accuracy. The shell of silicasol casting is high strength, high dimensional accuracy, castings, good finish, shape than the water glass of good quality and cheap off than TEOS when in the shell casting. As to silicasol casting, the casting surface finish for high margin or less and require no casting is particularly applicable margin. Silicasol casting use the high temperature properties of silicasol, let silicasol casting has good heat resistance, wear resistance, high temperature molten metal to reduce wear and tear on the mold, and help to mold. Since silicasol casting casting's excellent energy-saving and high temperature resistance, it is widely used in industrial furnaces and other heat and work equipment.