CLR mold and mildew stain remover can quickly remove tough surface mold and mildew stains on a wide variety of surfaces throughout the home, including painted walls, ceramic tile, hardwood floors, baseboards, fabrics, glass, metal, brick, concrete, marble, laminated countertops, fully cured and oil-based painted surfaces, hard plastics, automobile tires, wood, grout and fiberglass. This bleach-free remover has a foam sprayer that allows for a more direct application, preventing splash back and spores from spreading in the air.