Using the most advanced nano technology in the industry, the lithium formulation of Harden X™ enhances concrete hardness and protection against dusting, moisture, abrasion, bacteria and general wear & tear sustained by both interior and exterior surfaces over time. Harden X™ is not a coating, it completely penetrates the surface to become part of the structure in just one application to reduce cracking, no peeling or flaking for the life of the surface.