Boardwalk Cleaner with Bleach works as a mildew stain remover to quickly clean and whiten even the most difficult stains. Formulated with an odor counteractant and chlorine stabilizer. Application: Mold & Mildew Stain Remover; Applicable Material: Fiberglass; Grout; Tile; Vinyl; Chemical Compound: Bleach; Dirt Types: Mildew; Mold.