MORE Acidic Cleaner - Concentrated for Cleaning and Restoring Natural Stone - [Quart / 32 oz.] Professional strength formula for cleaning and restoring natural stone. Safe for daily use Experience a new, safer level of stone and tile care without sacrificing quality or results Perfect ceramic, porcelain and grout cleaner. Use only on non-acid sensitive surfaces Concentrated cleaner removes grout haze, efflorescence and mineral deposits More surface care products are manufactured and distributed in the usa