19 BUILDING PRODUCTS MADE OF PLASTIC-NAMELY, ROOFING MATERIAL, SEALING SHEETS, PASTES FOR SEALING SEAMS, PRIMERS FOR SEALING AND COVERING TAPE ON CONCRETE, PLASTER, WOOD, POLYESTER, AND METAL, SOLVENT WELDING AGENTS-NAMELY, SOLVENTS FOR AFFIXING PLASTICS THROUGH MOLECULAR BONDING FOR ROOF AND SEALING SHEETS, PLATES, FOILS, TUBES, PIPES, PROFILES, BARS AND ROLLS