- Wet & Forget outdoor is the "secret sauce" to this entire service so it's not that you can't go out to almost any store and pick some up for yourself. What is really being sold here is the use of comercial equipment to apply it to your house in broad areas ie; driveway, larger masonry areas, long fences, etc., and last but not least roofs. Yes you could climb up on a ladder with a little sprayer or even if you were brave enough stand on your roof and be up there for a short eternity with your little sprayer painfully coloring in your roof like it's a giant coloring book. I've done it! I don't need to tell you it's dangerous, but honestly it's not using your time wisely when we can show up, do it quickly, cover it better, do it affordably and you get to more important uses of your time. Just one treatment is likely all that is needed to cover the area you need cleaned and have it remain cleaned for far longer than any other means and done for a price you'll likely jump at. That being said if you would like more information, examples or reviews there is no better resource than to search Wet & Forget outdoor on Amazon.com and the facebook group "Wet & Forget Crew" it's honest real people reviews most often posted with photos of the surprise results. What you might be surprised to find is that the most popular use is in cleaning tombstones with results that are nothing short of amazing. It's worth the trip.