The present disclosure provides silicon-based coating compositions, comprising 8% to 30% (w/w of the total composition) polysilazane, 8% to 22% (w/w of the total composition) polysiloxane, and 30% to 45% (w/w of the total composition) high temperature silicone-based resin. The composition after curing is a thermal barrier coating that can withstand temperature over 1600° F. in accordance with ASTM E1530 test standards for heat stability, having a thickness ranging between about 0.4 mil and about 1.5 mil and a hardness ranging between about 4H and about 9H. Also provided are methods for applying these coatings.