Dr. Wall Care Concrete Hardener and Densifier penetrate deep into concrete surfaces and chemically react to form a permanent structure within the pores that can't be removed or broken down. The Densifier increases the strength and density of concrete by up to 45%, reduces the movement of water and moisture through the pores and reduces concrete dusting. Dr. Wall Care Concrete Hardener and Densifier can be applied in all types of interior and exterior concrete surfaces, and also be used as part of the polishing process. The applications of Hardener and Densifier include basement walls and floors, garage floors, retail floors, warehouse floors, kennels, concrete driveways, and more. It also works entirely below the surface of the concrete and do not change the look or color of the concrete.