Traditional thermal insulation coatings utilize the principle of heat reflection, resulting in a significantly higher thermal conductivity than air. The gel thermal insulation coating makes use of the excellent characteristics of gel, such as ultra-low thermal conductivity, flame retardancy, hydrophobic, etc., to make it have more superior thermal insulation, flame retardancy, waterproof and other characteristics. It can be widely used for outer fire insulation of electronic components, industrial equipment, and buildings.