I have a EverGrain composite deck. After trying almost every product the big box stores had that did not work I found a miracle in a small bag called CORTE CLEAN.I was only able to do half of my deck due to time and sun exposure on the deck. When I finished and saw how good it worked I could not believe it.Looking at the two sides of the deck when wet or dry it was totally amazing to see just how good it works. I did not know the deck was that dirty it took EVERY stain and mold mark out.If you are looking for a product that works then you can stop right here! JUST BUY CORTE CLEAN!!!!!!