A mixture for a thermal insulating plaster, especially a mixture for a thermal insulating plaster that contains aqueous solution of silicate, which contains 78 to 90 volume percent of hollow glass microspheres, 5 to 17 volume percent of aqueous solution of potassium silicate, 0.1 volume percent of water-glass-binder stabilizer, 1.5 to 5 volume percent of styrene-acrylate dispersion, 0.4 to 3 volume percent of aqueous colloidal solution of silver, 0.2 to 2.4 volume percent of tensides as an aerating agent, and 0.5 to 7 volume percent of water.