Concrobium mold control effectively eliminates existing mold, prevents mold re-growth and eliminates musty odors with no harmful chemicals. Ideal for homes, buildings, boats and cars. Works on drywall, wood, composite wood, plastic, concrete, shakes, metal, brick, stone, tile, grout, fabric, furniture and many more surfaces. Invisible shield prevents new mold growth. The unique technology is used by homeowners, professional remodelers, contractors and remediates. Concrobium works as it dries by crushing the mold spores at the roots and leaving behind an invisible antimicrobial barrier to prevent future mold growth. Apply Concrobium Mold Control in a thin, even layer over the affected surface. Allow to dry completely. with a Concrobium dampened cloth or brush, scrub the surface to clean away any remaining mold stains and residue. To protect against future mold growth, reapply Concrobium mold control on vulnerable surfaces. No bleach, ammonia or volatile organic compounds. Comes in 32-ounce trigger spray which covers up to 100-square feet.