High temperature resistant coating composition

A coating composition suitable for application to refractory linings and surfaces exposed to high temperatures to provide the linings and surfaces with increased resistance to thermal degradation, the composition comprising zirconium silicate in the range of about 55 to 95 wt.%, sodium silicate in the range of 0.1 to 15 wt.%, mullite in the range of about 2 to 5 wt.%, magnesium silicate in the range of about 0.1 to 2.5 wt.%, alumina hydrate in the range of about 2 to 5 wt.%, the remainder water, the sodium silicate, mullite, and alumina hydrate being present in the composition in a particle size in the range of 100 to 325, the coating composition capable of withstanding temperatures up to 4,000.degree. F., after curing.

A coating composition for refractory linings and metal molds which greatly enhances the useful life of the linings and acts as a releasing agent for metal molds, by being resistant to degradation by molten metal, the composition comprising zirconium silicate in the range of about 40 to 95 wt.%, sodium silicate in the range of 0.1 to 30 wt.%, mullite in the range of about 1 to 10 wt.%, magnesium silicate up to 10 wt.%, alumina hydrate in the range of 1.0 to 10 wt.%, the remainder water.

A coating composition for refractory linings and metal molds which greatly enhances the useful life of the linings and acts as a releasing agent for metal molds by being resistant to degradation by molten metal, the composition comprising greater than 55 wt.% zirconium silicate, 0.5 to 10 wt.% sodium silicate, 2 to 5 wt.% mullite, 0.1 to 2.5 wt.% magnesium silicate, 1 to 5 wt.% alumina hydrate, the remainder water.

A coating composition suitable for application to refractory linings and other types of surfaces exposed to high temperatures to provide the linings and surfaces with increased resistance to thermal degradation, the composition comprising zirconium silicate in the range of about 40 to 95 wt.%, sodium silicate in the range of about 0.1 to 30 wt.%, kaolinite in the range of about 1 to 10 wt.%, magnesium silicate up to 5 wt.%, alumina hydrate in the range of about 1 to 10 wt.%, the remainder water, the coating composition capable of withstanding temperatures up to 4,000.degree. F.