CHO Concrete Cleaner is highly effective for cleaning and preparing concrete surfaces prior to staining, sealing, or overlaying. The cleaner’s ability to etch the surface promotes better penetration of applied coloring materials and sealers, as well as enhances the bonding of cement-like overlays. This concentrated citric acid-based cleaner mixes with water to open the pores of the concrete, helping to remove efflorescence and other organic stains from the surface.