[ Filtering materials made of semi-processed foams and films of plastic; glass wool for insulation, packing, cushioning, stuffing materials of rubber or plastics, stuffing of rubber or plastic, sealant compounds for joints; plastics in extruded form for use in manufacture; cellulose acetate film used as an industrial or commercial packing material; stopping material for forming seals; insulating paint; insulating plaster; non-metallic flexible pipes ]