Every time I use Corte Clean on my Timber Tech Deck, I feel like my deck is brand new! It's so effective and easy to use. I also appreciate the awesome customer service. A couple years ago I called and spoke with a super helpful associate who tipped me off to ways to keep my deck in good shape all year long, even though it's exposed to some winter weather in Pennsylvania. Late last fall, I purchased some composite deck furniture and this spring Corte Clean made those look fabulous as well. I'm a faithful customer and tell anyone I know who has a composite deck about Corte Clean.