Concrobium Mold Control is a proven mold fighting solution that effectively eliminates and prevents mold. It can also be used to clean up existing mold and get rid of musty odors with no harmful chemicals. The formulation penetrates to the roots of the mold and contains no bleach, ammonia or volatile organic compounds (VOC's). Works on drywall, wood, plastic, concrete, siding, shakes, metal, brick, stone, tile, grout, stucco, fabric, furniture, upholstery, flooring and many more surfaces.