I used Corte Clean Eco-Friendly Composite Deck cleaner when my new TemberTech deck started getting mold and other types of stains. I ordered the Corte Clean over the phone and it was delivered as promised. The customer service was excellent and they really knew what they were talking about. It is rare that you call a company and are not rushed and they answer all your questions. The product performed as expected on my approx. 12′ x 20′ + steps deck! My TimberTech deck is completely clean of all stains including the mold although it did take several applications to get out the tougher stains and deeply rooted mold. Thank you TimberTech for recommending this great product. J. Senky Uniontown, PA