Unmatched in it's ability to clean and restore stone and grout to it's original color. You should always use a Alkaline based product on stone and grout first to remove greases, oils and any sealers on the surface. If further cleaning is needed an acid product can be used as a second phase of restoration. If an acid product is used as a second step you should rinse with Ultimate Stone & Grout to restore the pH of the stone and grout. Removes dark build-up of greases and soils that are typically imbedded in stone floors and grout.