Revive old and discoloured wall tile grouting in an easy, fast and safe way using the UniBond Grout Reviver Sponge Pack Give faded and tired looking wall tile grouts a new professional finish: the water-based UniBond Grout Reviver features a clean, easy-to-use, built-in sponge applicator. Thanks to its anti-mould resistance it provides ultimate protection in a single application for areas with high humidity such as bathrooms and kitchens. One tube covers up to 150 m based on a standard 2 mm grout application. The grout is only suitable for fully glazed ceramic or porcelain tiles.