Our Deck Restoration Plus Deck Cleaner can be used against mold, mildew and organic growth on exterior wood surfaces. Using our Deck Cleaner with the Deck Restoration Plus Deck and Wood Brightener, and our water-based stain is the perfect choice for the recommended bi-annual maintenance of exterior wood decks. Call us today for questions regarding our products or check out our online store, linked below! 866-440-3325