Eliminates stains from moss, mold, mildew, and algae that have built up on decks and patios. Features ZeroScrub technology so there is no scrubbing or power washing needed, just spray and walk away. Start seeing results in as little as 24 hours. Works great on vinyl, stucco, wood, composite wood, shingles, stone, cement, brick, and many more surfaces. Gets decks clean, and helps them stay clean longer.