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Rubber, gutta-percha, gum, asbestos, mica and goods made from these materials and not included in other classes; plastics in extruded form for use in manufacture; packing, stopping and insulating materials; flexible pipes, not of metal.
non-metal seals, namely, seals and sealing materials for doors and windows; sealants for building; fillers, namely, expansion joint fillers for doors and windows; insulating materials; barrier materials, namely, laminated vapor barriers, acoustic insulation barrier panels; thermoplastic spacers, namely, plastic sections for use in the manufacture of thermoplastic spacer frames for use as building materials for heating-insulating applications for doors and windows