Rubber, gutta-percha, gum for insulating, asbestos, mica and mica in the form of mica tubes, fireproof mica paper tape, mica sheets and mica pads for use in further manufacturing; plastics in extruded form for use in manufacture; packing and insulating materials; stopping materials, namely, fire stopping materials in the nature of fire retardant coverings of rubber, gutta-percha, gum for insulating, asbestos, or mica; flexible pipes, not of metal; heat insulating materials; heat protection ma...