Rock Doctor extra strength tile and grout cleaner is a non-abrasive natural formula that is safe for glazed and unglazed tile, and colored grout. Designed to remove grease, dirt, oil and soap scum. Restores the color and appearance of tile and grout. Use on ceramic tile, porcelain tile, most natural stone and granite. Size: 24 Oz. Type: Trigger Spray Shelf Life: