Dissolve mold and mildew stains with the power of bleach. This stain remover is safe for use in toilets, sinks, tubs and ceramic tile, acrylic, and fiberglass surfaces. Application: Tile; Tubs; Showers; Applicable Material: Fiberlass; Grout; Chemical Compound: Sodium Hypochlorite; Bleach; Dirt Types: Mold; Mildew. • Quickly dissolves mold and mildew stains. • Uses the power of bleach to whiten stains. • For use on fiberglass tubs, showers, tile and grout. • Safe on urinals, plastic (unpainted) awnings. • Not for use on metal, faucets, vinyl, formica or sensitive stone.