17 packing materials made of plastics, rubber, plastic and glass fibers for industrial or private use, in the form of liquids, masses for packing or sealing of interstices, fibers, sheets, strips and pads, for buildings, machines, vehicles, aircraft, ships, equipment, apparatus, tools, utensils, instruments and pipes; insulating materials, for industrial and private use in the form of liquids, masses for packing or sealing of interstices, fibers, sheets, strips and pads for electrical equipment, apparatus, tools utensils, instruments and cables