RUBBER/NEOPRENE STRUCTURAL AND SEALING JOINTS, JOINT SYSTEMS AND MATERIALS AND PRODUCTS FOR SEALING OF EXPANSION AND CONTRACTION JOINTS AND FOR CAULKING AND INSULATING VARIOUS PROJECTS, NAMELY, BRIDGES, ROADS, AIRPORTS, PARKING STRUCTURES, WATER TREATMENT PLANTS, NUCLEAR POWER PLANTS, SEWAGE SYSTEMS, IRRIGATION CANALS OR OTHER SIMILAR STRUCTURES INVOLVING THE JOINING OF CONCRETE OR STEEL