Composite silicate insulation coatings have a thermal conductivity lower than all traditional insulation materials. This material offers low thermal conductivity, good insulation effects, a wide range of humidity applicability, is non-toxic, non-polluting, and does not irritate or harm the body. It has high plasticity, is easy to apply, and can be sprayed or manually brushed on. It is suitable for thermal insulation of external wall surfaces of various kiln equipment, with good adhesion and resistance to shedding.