303A(R) Mold & Mildew Cleaner + Blocker quickly and safely cleans and removes tough mold and mildew stains from virtually any water-safe surface. Not only does this product CLEAN unsightly mold and mildew stains that have already formed, it will also help PREVENT mold and mildew stains from re-occurring on the treated surface. Quickly removes mold & mildew stains on contact Blocks mold & mildew stains from re-occurring Does not contain bleach, leaves behind a fresh scent Works on ALL water-safe surfaces, including vinyl & fabrics