Crew Tile and Grout RejuvenatorRejuvenate, whiten and brighten tile and grout with this reliable bleach-based product. Effectively removes tough mildew stains and soap scum. Easy to use: just apply to surface, wait for stains to disappear, then wipe and rinse. Safe for use on most washroom surfaces. Application: Bathtubs; Floors; Showers; Toilets; Urinals; Walls; Applicable Material: Ceramic; Fiberglass; Grout; Metal; Plastic; Stone; Chemical Compound: Bleach.