solutions and preparation methods necessary for the fabrication of metal oxide cross - linked polysiloxane coating films are disclosed . the films are useful in provide heat resistance against oxidation , wear resistance , thermal insulation , and corrosion resistance of substrates . the sol - gel precursor solution comprises a mixture of a monomeric organoalkoxysilane , a metal alkoxide m n , methanol , water , hcl and naoh . the invention provides a sol - gel solution , and a method of use thereof , which can be applied and processed at low temperatures . the substrate can be coated by immersing it in the above mentioned solution at ambient temperature . the substrate is then withdrawn from the solution . next , the coated substrate is heated for a time sufficient and at a temperature sufficient to yield a solid coating . the coated substrate is then heated for a time sufficient , and temperature sufficient to produce a polymetallicsiloxane coating .