Mold-Clean® is a non-fungicidal wood cleaner and surface conditioner that removes existing stains on wood and composite surfaces. It also works to brighten weathered wood. As a ready-to-use product, it is designed to clean easily and with minimal scrubbing. Unlike bleach, Mold-Clean penetrates deep into wood and composite materials to remove stains. It is perfect for use on siding, wood and composite decking, patio furniture and can also remove algae stains from brick and concrete.