1 Chemicals, namely, adhesives in the form of powders, liquids or pastes for use in the manufacture of laminated and tiled surfaces, roofs, pipe joints, wood joints, linings, floor coverings, windshields, reinforced concrete repair materials; synthetic resins and plastic in a raw state for use in the manufacture of sport-surfaces, playgrounds, industrial floors, park decks, water-proofed bridges, water-proofed roofs, balconies, tunnels, reactive mortars, injection compounds, structural and surface mortars, floor screeds, tiling compounds, primers, varnishes, lacquers, insulation materials; oil field chemicals, namely, additives for fluids for the drilling and workover of oil wells; chemicals, namely, cement, concrete, lime, mortar, plaster and anhydrite quality improving additives for use in the construction and the building industry trades; floor hardeners in the nature of dry shakes for cementitious floor systems