17 [ Rubber for use in the manufacture of gloves, gaskets, impregnation of fabrics, tires, footwear, automotive parts, roofing sheets and materials, and friction materials; gutta-percha for use in the manufacture of gloves, gaskets, impregnation of fabrics, tires, footwear, automotive parts, roofing sheets and materials, and friction materials; gum for use in the manufacture of gloves, gaskets, impregnation of fabrics, tires, footwear, automotive parts, roofing sheets and materials, and friction materials; asbestos for general industrial use; mica for general industrial use; latex for use in the manufacture of gloves, gaskets, impregnation of fabrics, tires, footwear, automotive parts, roofing sheets and materials, and friction materials; latex for paper; elastomers for use in manufacture; plastics in extruded form for use in manufacture; packing materials for forming seals, namely, gaskets for doors and windows; and insulating materials for forming seals, namely, gaskets for doors and windows; and flexible pipes not of metal ]