PROCYON Tile, Grout & Stone Cleaner will cut through the toughest build-up; it will dissolve grease, oil, soap, mold, mildew on tile, grout, and stone. Use PROCYON to clean showers, bathrooms, and kitchen floors. PROCYON will clean clay, ceramic, pool tiles. grout, stone, marble. slate, granite, flagstone, terrazzo, and ultra safety floors. PROCYON will even clean the bottom of ponds, fountains, or pools - anywhere there is slime buildup.