Wet & Forget Mold, Mildew, Moss & Algae Stain Remover Concentrate

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An easy and effective way to clean black and green mold, moss, mildew, and algae from virtually any outdoor surface, Wet & Forget requires no scrubbing, rinsing, or power washing. Just spray it onto outdoor furniture, siding, and concrete, and other surfaces.

  • Simply dilute stain remover with water and spray the surface to be cleaned
  • No scrubbing, rinsing, or power washing required
  • Non-acidic, bleach-free formula works to remove mold, moss, mildew, and algae stains
  • Net weight 0.75 gal
  • Concentrated formula makes 4.5 gallons

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Reviews & Community QA

Rated 4.4 out of 5 by 19 reviewers.
Rated 5 out of 5 by It Works! I tested an area of vinyl siding on our home. I'm very impressed with how well this product works. I mixed it according to the directions, sprayed it on and left it. I will definitely use it on the whole house. 01-12-17
Rated 5 out of 5 by Miracle Worker This product is a miracle worker! At first I wasn't sure it would work. I added it to my garden pump sprayer and applied it to the surfaces that were turning green. I did not see any immediate change but after about 30 minutes I could see that that the green stuff that was starting to creep into my outdoor carpet was disappearing right before my eyes! It has been months and nothing has come back and it saved me having to drag out the power washer and scrub away --- - and it was quick! 01-11-17
Rated 5 out of 5 by Wow This is a great product. I swept my deck, sprayed the product. In 3 days I saw a huge difference! At 2 wks no more green! Easy easy to use. It just doesn't get any easier than this! 09-23-16
Rated 5 out of 5 by Really works well! We live in North Carolina so mold and mildew are a real problem. We have used Wet & Forget previously and found it to be really effective and it does not harm plants. It does not act immediately but works really well. Thus the name Wet & Forget. We have recommended it to others including our daughter. 09-08-16
Rated 1 out of 5 by Waste of money This product did not do anything. Very disappointed in the product. I was hoping this would clean the black off my driveway but it did not. I followed the instructions but after waiting several weeks of no change I ended up pressure washing. Waste of money. 09-04-16
Rated 5 out of 5 by Fantastic Works great! Easy peasy! Just spray on and it dissolves and no rinsing. 09-03-16
Rated 5 out of 5 by Wet & Forget WORKS! What a relief to have found Wet & Forget! Started using it when we had heavy algae growth on our vinyl siding, roof, concrete sidewalk and driveway following a very warm rainy summer 7 years ago. I was skeptical at first. Rain removes the algae after application, so how long it takes depends on how much it rains, how heavy the rain and how it hits those areas you want algae and moss removed. For example, sometimes it comes down slanted hitting siding on only one side of the house, other times it hits the other side. Sometimes rain comes straight down. In that instance, algae on the siding isn't getting the full brunt of the rain. It also depends on how much algae and moss you have. It might take longer for rain to remove it. Wet & Forget is not 100% perfect. We have problem spots on our sidewalk around shrubs that rain doesn't remove. I brushed them with a stiff stainless steel brush, then sprayed. Maybe a pressure washer would be better. Concrete can be difficult because algae embeds itself, particularly, if the concrete is not real smooth. Generally, if you want algae and moss removed immediately, you will have to wash it off first before spraying. Wet & Forget must dry thoroughly after application, so don't spray when rain is forcast. The benefits of using Wet & Forget are it kills the algae and moss; rain removes it, and prevents it from returning for about 1 year. Make sure you use the recommended dilution or you might have a little return before a year if too weak, particularly, if you have a rainy season. See Wet & Forget's website and directions on the bottle. Usually, those who claim it didn't work didn't follow directions or didn't wait long enough for it to work. Very heavy infestations might need more than one spraying. If you follow directions, are diligent, spraying around the same time every year, you should be able to prevent most of it from returning. Eleven months since the last spray, there is no algae on my siding and roof. There are a few spots on the sidewalk, but I can deal with that compared to the mess we had before using Wet & Forget. 08-23-16
Rated 5 out of 5 by Love, Love, Love Wet & Forget I have been using Wet & Forget for many years. I have used it everywhere around my house. I initially used it on my shed roof and the results were unbelievable. I have 40 year old concrete sidewalks that look amazing, It took a few months to see a big difference but they have been clean now for 4 years. Simply AMAZING.......Glad to see it on QVC. 08-08-16
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