Cleans and destains decks, fences, and other weathered wood, helping restore the natural, like-new appearance. This product removes UV damaged, gray wood fibers, ground-in dirt, and stains from mildew and algae on decks, fences, and other exterior wood structures. It also removes nail bleed and dark tannin bleed from tannin-rich Cedar, Redwood, Mahogany, Ipe, and more.