Culprinol deck wash, culprinol deck brightener. The deck wash is un believable, you get a hand pump up deck sprayer and spread the stuff on. Then wait about 15 minutes, then with a garden hose, just wash it off and it is great. I use this on the job all the time. I always like to do this when the customer is not around because its soo good and soo easy, I hate to take pay for this.