Rubber, gutta-percha, gum, asbestos, mica and goods made from these materials and not included in other classes, namely, liquid rubber, padding materials of rubber, rubber tubes; plastics in extruded form for use in manufacture; weatherstripping compositions, namely, weatherstripping sealants in the nature of caulk, caulking materials and synthetic polyolefin compounds; insulating materials, except for floors and flooring underlays; flexible tubes of plastic, not of metal; packaging materials...