17 Adhesive mastics; insulating adhesives; adhesive materials in the form of films; adhesive and self-adhesive sheets of plastic; plastic goods for manufacturing glues for packaging and adhesive materials for packaging; gutta-percha; elastic rubber, balata and substitutes; rubber and plastic sheaths for sealing; parts made of rubber and gutta-percha; sheets, plates and rods of plastic; materials for hermetic closures, for sealing and insulating; non-metallic pipes; electric, thermal and acoustic insulators; sealants for use in building and particularly cement-based waterproofing; plates of polystyrene; plastics in the form of latticework for building, polyurethane films; semi-processed plastics in sheet form, rubber, heat-sealed plastics, polyurethane sheets, plastic film other than for packaging, adhesive tapes included in this class; plastic strips; adhesive tape for joints; transparent polyurethane adhesive tape; semi-finished materials of polyurethane