Revive old and discoloured wall tile grouting in an easy fast and safe way using the UniBond Grout Reviver. Give faded and tired looking wall tile grouts a new professional finish. 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 150m based on a standard 2mm grout application. The grout is only suitable for fully glazed ceramic or porcelain tiles. It comes ready to use and dries within 60 minutes â?,???o refreshing grout has never been so easy.