17 Flexible pipes, tubes, hoses and fittings therefor (including valves), and fittings for rigid pipes, all non-metallic; seals, sealants and fillers, namely, sealing and insulating materials, sealing plugs made primarily from rubber, adhesive sealants for general use, polyurethane sealants, caulking; insulation and barrier articles and materials, namely, insulating materials, polyurethane insulating materials, insulating sleeves for heat storage tanks, insulation covers for industrial machinery, insulating blankets and sleeves for hot water heaters, polyurethane film for use in sealing and insulating, weatherizing membranes and vapor barriers, sealing and insulating materials and temperature insulation barrier panels; elastomers, namely, elastomer expansion joints and elastomers for bonding to articles used for shot-blasting; shock-absorbing and packing materials, namely, packing material for forming seals, packing and insulating material, molded foam for packing; vibration dampers, namely, shock absorbing rubber buffers for industrial machinery; membranes and semi-processed synthetic filtering materials, namely, insulating waterproofing membranes, semi-processed plastics in the nature of filtering materials in water installations, and weatherizing membranes and vapor barriers; adhesive tapes, strips, bands and films for industrial purposes