The easiest and most inexpensive way to renew the look of tile grout. Suitable for any tiled floor, Tile Grout Whitener not only re-whitens grout but also seals and waterproofs to prevent further staining and mildew. Simply wipe on using the easy-to-use foam dispenser top and leave to dry, then wipe clean. Your grout will be sparkling white in no time. 112ml bottle.