High temperature resistant coating prepared by sol-gel method has the following advantages:
Good uniformity of ingredients
In the sol gel process, the precursor gradually forms a gel network through hydrolysis and polycondensation reaction. Metal ions and other components can achieve uniform mixing at the atomic level in the solution, making the final coating highly uniform in composition, effectively avoiding the non-uniformity of coating performance caused by component segregation and other problems, which is critical to ensuring the stability of the overall high temperature resistance performance of the coating.
High purity
Due to the fact that the precursors used are mostly metal alkoxides or high-purity metal salts, and the entire preparation process is mostly carried out in a solution environment, compared to some traditional preparation processes, the influence of impurities is relatively small, and high-purity coatings can be prepared, which helps to better exert the inherent properties of coatings such as high temperature resistance and oxidation resistance.
Can be prepared at low temperatures
It does not need to use extremely high temperature to melt the material and then form the coating like thermal spraying. Instead, it can complete the transformation process from sol to gel and then to the coating under relatively mild reaction conditions at a lower temperature. This is very friendly to some substrates that are not resistant to high temperature, which can avoid damaging the performance of the substrate during the preparation of the coating and broaden the range of applicable substrates.
Accurate control of coating thickness
By adjusting the concentration of the sol, the number of coatings, and subsequent drying, curing, and other process parameters, the thickness of the final coating can be accurately controlled. Based on actual usage needs, high-temperature resistant coatings with different specifications from thin to thick can be prepared to meet diverse application requirements.
Can prepare coatings with complex shapes
The sol has good fluidity and can be easily coated on the surface of the substrate with complex shapes, such as some parts with special shapes such as curved surfaces, pores, grooves, etc. After the subsequent transformation into gel and coating, it can well fit these complex shapes, achieve comprehensive and effective protection for such complex shaped parts, and provide high temperature resistance guarantee.
High process flexibility
By selecting different precursors and adding different functional additives, the composition and structure of the coating can be flexibly designed, thereby endowing the coating with various properties, such as good thermal insulation and corrosion resistance, in addition to high temperature resistance. This facilitates the customization of multifunctional high temperature resistant coatings that meet specific application environments.

Room termperature curing polysilazane, pls check IOTA 9150, IOTA 9150K. 
High termperature curing polysilazane, pls check IOTA 9108, IOTA 9118.