MoldAvenger helps remove mold and mildew and prepare a surface for painting. It is effective on a variety of surfaces including siding, decks, masonry and fences. MoldAvenger is harmless to plants and animals and appliers – it contains no-VOC and is 100% biodegradable. In just one application, MoldAvenger can clean, remove mold, mildew, and organic growth, abate odors, and neutralize PH.