1 Chemical preparations for use as densifiers on concrete, terrazzo, masonry, natural stone, cast stone, tile, and cement-based surfaces; chemical preparations for use as hardeners on concrete, terrazzo, masonry, natural stone, cast stone, tile, and cement-based surfaces; chemical preparations in the nature of preservatives for use on concrete, terrazzo, masonry, natural stone, cast stone, tile, and cement-based surfaces, and specifically excluding paints and oils; chemical preparations for use as a stain repellent treatment on concrete, terrazzo, masonry, natural stone, cast stone, tile, and cement-based surfaces; chemical preparations for use as a densifier for inorganic or organic flooring surfaces, namely, concrete, terrazzo, masonry, natural stone, cast stone, tile, cement-based surfaces, luxury vinyl tile, vinyl composite tile, vinyl-based surfaces, resilient flooring, and wood; chemical preparations in the nature of preservatives for inorganic or organic flooring surfaces, namely, concrete, terrazzo, masonry, natural stone, cast stone, tile, cement-based surfaces, luxury vinyl tile, vinyl composite tile, vinyl-based surfaces, and resilient flooring; chemical preparations for use as stain repellent for inorganic or organic flooring surfaces, namely, concrete, terrazzo, masonry, natural stone, cast stone, tile, cement-based surfaces, luxury vinyl tile, vinyl composite tile, vinyl-based surfaces, resilient flooring, and wood; chemical preparations for use as densifiers, namely, silicate-based densifiers; chemical preparations for use as a densifier for concrete or asphalt surfaces; chemical preparations for use as a densifier for transportation surfaces, namely, roadways, runways, bridges, parking decks, and sidewalks; chemical preparations in the nature of preservatives for concrete or asphalt surfaces, and specifically excluding paints and oils; chemical preparations in the nature of preservatives for transportation surfaces, namely, roadways, runways, bridges, parking decks, and sidewalks, and specifically excluding paints and oils; chemical preparations for providing concrete, terrazzo, masonry, natural stone, cast stone, tile, cementitious, and asphalt surfaces with freeze-thaw protection; chemical compounds for curing concrete