Wolman DeckBrite Wood Cleaner and Coating Prep Powder Concentrate to clean and restore decks and other weathered exterior wood, or to prepare new wood surfaces before sealing or staining. Its oxygen-activated, safe to use formula will not harm plant life, damage wood lignin or leave a bleached out look. Ideal for pressure treated wood, weathered cedar and redwood and composites. Restores weathered wood prepares new wood before coating. Ultra oxidizer, oxygen activated powder concentrate. Deep cleaning foam works in 10 Minutes. Clings to vertical surfaces. Environmentally safe, acid and chlorine free.