Stone Soap Ultra is a highly concentrated water based cleaner used by the professionals which has been specifically formulated for marble, granite, slate, limestone, terrazzo, cultured marble, ceramic and quarry tile and all other natural interior and exterior stone surfaces. This concentrated cleaner can be diluted from 2 ounces to 1 gallon with water which means that each gallon of product makes up to 64 gallons of cleaner (DO NOT confuse this cleaner with the usual "spray and wipe" type cleaners which are mainly water). Stone Soap Ultra is specifically formulated to be "stone friendly" and when diluted will not dull or damage the stone surface and it will not leave any soap residues or cause the surface to become slippery. Unlike other harsh and aggressive cleaners, our cleaner is pH neutral (pH 7), does not contain any abrasives, acids , alkalis, salts, phosphates, d-limonene, artificial colors, fragrances and preservatives. Stone Soap Ultra will clean down into the the pores of all natural stone surfaces to remove dirt, dust, grime, soot, grease, oils, food and beverage spills, finger-prints and scuff-marks.