17 synthetic and natural rubber; materials to prevent from heat radiation; isolating compounds against dampness in buildings; insonorization materials; isolating paper; isolating materials; scoriae wool, glass-wool and rock wool for isolation; rubber muffs for the protection of machine parts; rubber solutions for joints; finished and semi-finished plastic materials, seals, isolating gaskets,isolating fibres of plastic material; pipe fittings; artificial resins, semifinished goods of artificial resins; adhesive and isolating tapes ( not included in other classes ) flexible non-metal pipes ; heat isolating goods made of rubber, plastic material and asbestos (not included in other classes