This rigid mica sheet for heaters consists of Pamica muscovite and phlogopite or alternatively synthetic mica paper, impregnated with high temperature resistant organic silicon resin after the melting and laminating process. The long-run working temperature is 500℃-700℃. This superb rigid mica sheet is widely used as insulating parts for electric toasts, hair dryers, electric irons, curlers, electric hot combs, strip heaters, baseboard heaters, also in other appliances and applications where excellent resistance to moisture is required.