Abstract: Selection of fireproofing coating components,such as forming agent, carbonforming agent, dehydration and carbonforming catalyst and colourant,were discussed.Inorganic dilative fireproofing coatings formulation based on waterglass as binder has been studied, in which some water resistant and increase viscosity assistants were mixed.the property of coatings has been tested, good water resistant and prevent fire.Key words: waterglass;inorganic dilative ;fireproofing coatings