Insulating material, namely, non-woven textile fabrics, felts, woven fabrics, woven strips, knitted fabrics, braided tubes, packing and cords formed of heat-stable fibers or fiber yarns; packings, tubings, webbings, and stamped parts for thermal shielding or insulation; and yarns, threads, ropes, cords, packings, tubings, webbings, fabrics, fibres, felts and stamped parts for thermoduric seals