17 Rubber, raw or semi-worked; polymer material vulcanizable to rubber, namely, vulcanized fiber and insulating material; plastics in extruded form for use in further manufacturing; stopping and insulating materials, namely, packing and insulating materials; radiation shielding materials, namely, blocks being sealing material, non-metal gaskets, waterproof, silicone sealants, and insulating material to resist fire and radiation and to offer water tightness and gas tightness; radiation resistant materials, namely, blocks being sealing material, non-metal gaskets, waterproof, silicone sealants, and insulating material to resist fire and radiation and to offer water tightness and gas tightness; radiation blocking materials, namely, blocks being sealing material, non-metal gaskets, waterproof, silicone sealants, and insulating material to resist fire and radiation and to offer water tightness and gas tightness; radiation alternating materials, namely, blocks being sealing material, non-metal gaskets, waterproof, silicone sealants, and insulating material to resist fire and radiation and to offer water tightness and gas tightness; non-metal, flexible insulating sleeves for machinery; sealing plugs primarily of rubber and of polymer materials vulcanizable to rubber; fire-resistant sealing plugs made primarily of rubber; fire-resistant and non-fire resistant sealing plugs made primarily from rubber; waterproof packing material for forming seals around pipes and cables; packing material for forming seals; non-metal pipe muffs for use with metal and plastic pipes; insulating sheaths for cables in the nature of insulating sleeves for cables; sealing material for use in engineered constructions, buildings, offshore-constructions, trains, boats, tunnels, nuclear power plants and for road sealing, pavement sealing, for vessels, aircrafts, railway rolling stocks, power distribution machines, power generators, industrial furnaces and chemical plants; sealing pipe muffs made of rubber for use with plastic pipe or metal pipe; sealing pipe gaskets; insulating sealing sleeves made of rubber or rubber-like material for protecting parts of machines and buildings and nuclear power plants, sealants made of polymer material vulcanizable to rubber, namely, waterproof and fire resistant waterproof, silicone sealants; goods of foam, rubber for use in radiation alternating sealing systems not included in other classes, namely, rubber sealing plugs and sealing gaskets