Wet & Forget Moss, Mold, Mildew, & Algae Stain Remover Multi-Surface Outdoor Cleaner Concentrate, Original, 128 Fluid Ounces

This stuff is wonderful for outdoor furniture and my slate patio. Clean like nothing else. Does better than a pressure washer on outdoor furniture. Takes a bit to work completely but stays clean for a long time.

This stuff is incredible! I used several brands before I found this one, this one is the best buy a mile!! It not only removes the mold, but it keeps it from growing back for UP to year. It's easy to use, fast acting, keeps working for months. No rinsing, no scrubbing. Highly recommended ☆

Wow what a surprise using this product. Put in garden sprayer and diluted as instructed. Worked like a charm after a couple of days and have used before to confirm it stayed effective for well over a year. Good stuff. Price went up but it works.

I love this stuff! Very easy to spray on, works quickly and lasts a long time!

This WnF is soooo great. A friend told me that the darkening of concrete over time is usually tiny black mold. WnF attacks that and brings your concrete bright again! Take before photos, apply, and then be patient. In 2-4 weeks you will see the result is bright white sidewalks and driveway, and very long-lasting. I regret pressure-washing my former driveway, as it removed small amounts of the surface; accelerating the concrete aging. However, WnF is not only easier, it lasts far longer than pressure-washing without removing parts of the surface. Because you need to wait weeks to see the result it is not as gratifying when applying. But know that it works; take before and after photos —or— test on one “square” of your sidewalk first. After a few weeks, that will be brighter than the adjacent squares. If you have green active growth on your stonework or shaded areas. You may notice it turn orange as the enzymes begin working. Any thick growth may later require removal, but WnF increases the length of time before growth returns. Usually several years in my experience. I use it on my concrete driveway, sidewalks, brick + mortar, and even the shaded side of my kids’ wooden playset roof. I used it on the padded portions of my boat trailer to make it look brand new, also. I am not an expert on what surfaces to avoid, but I avoid plants + grass and I allow to dry before my pets walk on it. Definitely purchase the concentrate and determine your own dilution. When I have tried the gardenhose-end variant of this WnF product, it appears less-effective. Always apply early morning or late evening so it can maximize before the sun evaporates. Also apply when you don’t think it will rain for 24 hours (turn off your sprinkler system for a day, if you have one). I hope that helps! I cannot say enough about how great this stuff works!

I have used this before and I think this takes out mildew spots and build up pretty well. Use it a lot on my canvas and outdoor cushions , pillows , rug. Etc. would highly recommend .

I used a garden sprayer to spray the moss on our roof with wet and forget. Yes, it kills the moss. BUT- read the directions and follow them! My sprayer was new and the fitting came loose, leaking on my hand, back and leg. It was 20+ minutes before I washed it off. I was pretty sick for the next week, rash, fatigue, itching, brain fog. Also note the comment about not spraying near water. I was on the roof and doing my best to spray with low pressure but there was a lot of atomization and the breeze carried this everywhere. I was wearing a mask but probably should have had a full body suit and glasses on. This mist made its way to our little 90- gallon pond next to house and killed all the fish. Yes, I learned my lesson, the instructions say not to spray near water; I should have covered the pond; what appeared to be a little mist up on the roof went a long way on the environment. We made it 20 years in the pacific northwest without moss issues but the last few years, something has changed and we are getting consistent moss growth on the roof, rock walls, deck, and all around. My mixed review is based on the fact that it works, but this seems like a harsh chemical for the environment and the user. I don't know if I can recommend this or not My wife is hard set against it as she maintains a healthy garden around the house with many animals and critters.

You won't be disappointed! Just spray it on and see the difference! I didn't move and potted plants in my patio. Just spray it evenly on your patio concrete and let it dry on its own. And you will not see any green moss or algae! I sprayed my patio umbrella's too! Great product and worth the price.