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

4.4 4.4 out of 5 stars 9,789 ratings

128 Fluid Ounces
Remover
Brand Wet & Forget
Item Weight 8.3 Pounds
Liquid Volume 128 Fluid Ounces
Item Form Liquid
Coverage 750 - 2,250 square feet

About this item

  • Wet & Forget Concentrate Outdoor Cleaner removes green and black stains caused by moss, mold, mildew, and algae, no scrubbing, no rinsing, no pressure washing, just wet it and forget it on multiple surfaces including driveway, patio, roof, siding, deck, vinyl, wood, concrete, canvas, aluminum, and upholstery
  • Mix 1 part Wet & Forget with 5 parts water in a garden sprayer, spray dry surface on a cool day to avoid rapid evaporation of product, do not rinse, apply when rain is not forecasted within 4-5 hours, apply when the temperature is above 32° F; unused product can be stored mixed and ready in sprayer for future applications with unlimited shelf life
  • Cleans over time with the wind and rain, green stains clean up within 1-2 weeks, black stains or heavy, stubborn stains can take several months, long-established stains may take 6-12 months; surfaces can stay clean up to 1 year or longer
  • It is bleach free and non-acidic; spray 100 feet away from lakes, ponds, rivers, and streams and flush plants with water before and after application
  • One bottle treats 750 - 2,250 square feet, heavy stained and porous surfaces will absorb more product

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From the manufacturer

wet and forget outdoor
wet and forget concentrate

FEATURES

Any Surface

Coverage

no power washing

No scrubbing

Use Wet And Forget To Clean

fence

Deck

stone

stone

Hose End Hose Refill concentrate Concentrate Ready To Use
BUY BUY BUY BUY BUY
Customer Reviews
4.0 out of 5 stars
164
4.4 out of 5 stars
932
4.3 out of 5 stars
5,450
4.4 out of 5 stars
9,789
4.0 out of 5 stars
12,896
Price $38.98 $34.25 $38.53 $20.64
Application Method Hose Refill for Hose End Pump Sprayer Pump Sprayer Trigger Sprayer
Coverage Covers up to 2,000 sq ft Covers up to 2,000 sq ft Covers 375 - 1,125 sq ft Covers 750 - 2,250 sq ft Covers 60 - 180 sq ft
Where to use Safe for use on virtually any outdoor surface Safe for use on virtually any outdoor surface Safe for use on virtually any outdoor surface Safe for use on virtually any outdoor surface Safe for use on virtually any outdoor surface
What to expect Green stains clean up within 1-2 weeks, black stains or heavy, stubborn stains can take several months. Green stains clean up within 1-2 weeks, black stains or heavy, stubborn stains can take several months. Green stains clean up within 1-2 weeks, black stains or heavy, stubborn stains can take several months. Green stains clean up within 1-2 weeks, black stains or heavy, stubborn stains can take several months. Green stains clean up within 1-2 weeks, black stains or heavy, stubborn stains can take several months.

Product Description

Wet & Forget is an outdoor cleaner that eliminates black and green stains caused by moss, mold, mildew and algae without any scrubbing, power washing or bleach. Just mix 5 parts water with 1 part Wet & Forget in a pump up garden sprayer. Fully saturate a dry surface with Wet & Forget on a cool dry day and leave it. That’s it! Just wet it and forget it. Wet & Forget goes to work with the wind and rain to gently clean the surface over time. Green stains generally clean up within a few weeks, a few days with rainfall. Black stains or heavy stubborn stains may take 6-12 months to fully clean up. Be Patient, Good Things Take Time! Wet & Forget properly cleans surfaces, so they are likely to stay clean up to 1 year or longer. Repeat application yearly or when new stains appear to maintain a clean surface. Wet & Forget contains no bleach and is safe to use on any outdoor surface including any type of deck, siding, roof, walkway, patio, brick, and cement. Gallon Concentrate makes 6-Gallons and covers 750 - 2,250 sq. ft. depending upon severity of the stain and porosity of the surface. Wet & Forget - the easy way to clean all your outdoor surfaces

Product details

  • Is Discontinued By Manufacturer ‏ : ‎ Yes
  • Product Dimensions ‏ : ‎ 6.25 x 4.5 x 10.5 inches; 8.35 Pounds
  • Item model number ‏ : ‎ E800006
  • Department ‏ : ‎ Unisex-Adult
  • Material Feature ‏ : ‎ Biodegradable Warning
  • Date First Available ‏ : ‎ November 1, 2007
  • Manufacturer ‏ : ‎ Wet and Forget
  • ASIN ‏ : ‎ B0019KSUG6
  • Customer Reviews:
    4.4 4.4 out of 5 stars 9,789 ratings

Product guides and documents

Compare with similar items

This Item
Wet & Forget Moss, Mold, Mildew, & Algae Stain Remover Multi-Surface Outdoor Cleaner Concentrate, Original, 128 Fluid Ounces
Wet & Forget Moss, Mold, Mildew, & Algae Stain Remover Multi-Surface Outdoor Cleaner Concentrate, Original, 128 Fluid Ounces
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Price$39.96-18% $34.55
List:$41.99
$46.00$61.32$86.54
Delivery
Get it as soon as Tuesday, May 21
Get it as soon as Monday, May 20
Get it May 20 - 22
Get it May 20 - 23
Get it May 20 - 21
Customer Ratings
Easy to use
4.4
4.8
3.5
4.3
4.0
Value for money
3.9
4.2
2.6
3.3
4.1
Style
3.9
2.7
3.8
Sold By
Amazon.com
Amazon.com
G's Ventures
Hearthshire
PLEXSUPPLY.
liquid volume
128 fluid ounces
1 gallons
1 gallons
132 fluid ounces
2.6 gallons
5 gallons
coverage
750 - 2,250 square feet
2000 square feet
2000 square feet
1000 square feet
form
Liquid
Liquid
Liquid
Spray
Spray
Liquid
weight
8.35 pounds
128 ounces
8.3 pounds
86 pounds

Important information

Ingredients

Alkyl dimethyl benzyl ammonium chloride

Legal Disclaimer

Statements regarding dietary supplements have not been evaluated by the FDA and are not intended to diagnose, treat, cure, or prevent any disease or health condition.

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Customer reviews

4.4 out of 5 stars
4.4 out of 5
9,789 global ratings

Customers say

Customers like the appearance of the weed moss control agent. They say it makes their stones look brand new and is fairly easy to maintain. They are also happy with the performance and ease of use. However, some customers disagree on mosses control, smell, quality, toxicness, and value.

AI-generated from the text of customer reviews

1,109 customers mention840 positive269 negative

Customers like the performance of the weed moss control agent. They mention that it works very well, produces amazing results, and is the best stuff for problem areas. It removes black crud and greatly improves footing.

"...So i bought this and sprayed it on and waited. It worked great the siding you could not see the black anymore and lasted for a couple of years...." Read more

"...No more scrubbing & hosing on a wet slippery metal roof. This stuff really works but you just have to give it time. Thanks for a great product." Read more

"Works very well if you don't mind waiting. It's not like bleach were you see the results instantly...." Read more

"Just be patient, its not bleach so results are not instant. But it works great, and appears to last a long time." Read more

239 customers mention230 positive9 negative

Customers find the weed moss control agent very easy to apply. They say the instructions are incredibly simple and take only 15 minutes to follow. Some mention that it takes several weeks to work, but the results are perfect.

"...It's important to read the instructions...." Read more

"Easy to use with hose" Read more

"...Using this product has saved me time and has kept me off the ladder. It is a great product!" Read more

"...I already had an applicator so it was very easy to apply. Results are still improving. Love this." Read more

98 customers mention80 positive18 negative

Customers like the appearance of the weed moss control agent. They say it makes things look new again, and it's easy to maintain that clean look. Some customers also mention that the stones now look like new, and the walls look cleaner. They also say the surface is beautifully natural and creamy white when clean.

"...was almost black, before application, however, now it has a newly laid look...." Read more

"...I did take a bucket of water and a very light scrub and it looks brand new!" Read more

"...it finally does work (a few months later) t it is fairly easy to maintain that clean look if you it apply this stuff regularly -- once a year or so." Read more

"...I didn’t notice any discoloration on any grass which was something I was worried about...." Read more

331 customers mention226 positive105 negative

Customers are mixed about the quality of the weed moss control agent. Some mention that it works great and the concrete stays clean for a year. However, others say that it poisons the plants and leaves the leaves with yellow spots. They also say that the product removes paint along with the mildew and that it takes a long time for the stains to go away.

"...Over time, you'll start noticing your surfaces becoming cleaner and cleaner and it lasts just about all year!!..." Read more

"...It works. It keeps fences clean even after 2 years of application. It doesnt seem to attract as much moss, lichen mold etc...." Read more

"...Only negative was our Fushia's and rhododendron developed yellow spots on leaves so next time i sprayed i covered with Visqueen." Read more

"...What I will say is that when applied correctly, this has allowed us to skip every other wash...." Read more

202 customers mention113 positive89 negative

Customers are mixed about the value of the weed moss control agent. Some mention it's well worth the money, works great, and saves a lot of money. However, others say it'll be a waste of money and expensive way to kill the mosses.

"...Great product, works well, great value, not very well thought out on application." Read more

"...▪ This product is on the expensive side, so I shop around when I need more. The last 2 gallons I purchased cost me $24.97 a gallon at the Home Depot...." Read more

"This stuff is truly AMAZING and works exactly as it says , Wet it and forget it. Highly recommended" Read more

"...Easy to useCONS:Pricey for what it is (pool algaecide)..." Read more

193 customers mention109 positive84 negative

Customers are mixed about the moss control. Some mention that it eliminates mosses and algae over a period of time, while others say that it didn't remove mold and mildew as advertised.

"...I got up on our roof and the green algae is gone!! No more scrubbing & hosing on a wet slippery metal roof...." Read more

"Really heavy mold on my composition roof . As the directions clearly stated it takes a little time to work ...." Read more

"Many uses keeps moss away with regular use. Great for roofs driveways siding and even grass!" Read more

"...over the course of this spring, we noticed that we had a moss problem on 1 large section of our roof (basically the attached 2 car garage)...." Read more

67 customers mention35 positive32 negative

Customers are mixed about the toxicness of the product. Some mention that it does not harm lawns or plants, while others say that it is really deadly to plants and has many health hazards.

"...This product works very slow which makes it safer and more long lasting, especially on roof shingles...." Read more

"...It actually started eating the moss and mold between cedar shakes, that was actually like a barrier for..." Read more

"...on molded brick wall.. it works slow but it explains why...No Dangerous harsh chemicals! So I can live with that...." Read more

"...Near the end of July, the roof was nearly covered in moss again and I was getting desperate...." Read more

53 customers mention29 positive24 negative

Customers are mixed about the smell of the weed moss control agent. Some mention that there was no nasty smell, while others say that it has a slight bleach like smell when it's first applied.

"...By the end of the day a lot of the black mold was disappearing. Sometimes it may take days to do all the work and you may want to reapply...." Read more

"...It has a bit of an acrid smell, so wear a mask. I haven’t noticed any damage from using it, so it seems safe." Read more

"...It has a very pleasant scent and does not harm lawns or plants. Did not stain my siding. Highly recommend." Read more

"...It could take a month or longer for visible results.- Slight bleach like smell when it's first applied...." Read more

Removes Mildew on Marker Engravings
5 Stars
Removes Mildew on Marker Engravings
I used this years ago on my slate roof and it removed the mildew just like it says. I noticed my family cemetery plot from the 1940's had markers that were so dark with mildew that they were unreadable as the pic shows. I knew this was safe on Stone Markers so I applied it heavy with a soft scrubbing brush and in 3 months the change was remarkable as you could clearly see the names and dates. It was been working over the winter and when it warms I will reapply and they will be good for years. For privacy I will not show the after pictures.
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Top reviews from the United States

Reviewed in the United States on May 10, 2024
Size: 128 Fluid OuncesStyle: RemoverVerified Purchase
I've been using Wet & Forget for 5 years now and it has made an amazing difference in my driveway, sidewalk, AND my pool patio! I don't have to pressure wash as much anymore! Don't expect immediate results after you spray it on. It's important to read the instructions. Over time, you'll start noticing your surfaces becoming cleaner and cleaner and it lasts just about all year!! It's best to apply in overcast or cloudy weather so the sun doesn't evaporate the solution so quickly. You GOTTA try this stuff. You won't regret it!
Reviewed in the United States on April 23, 2024
Size: 128 Fluid OuncesStyle: RemoverVerified Purchase
Just be patient, its not bleach so results are not instant. But it works great, and appears to last a long time.
One person found this helpful
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Reviewed in the United States on April 23, 2024
Size: 128 Fluid OuncesStyle: RemoverVerified Purchase
Ok i have read the bad reviews. For me our house is painted white with t 11 siding, the north side was looking pretty bad with black algae all the way up and under eves. we used to spray bleach and water and scrub it off. So i bought this and sprayed it on and waited. It worked great the siding you could not see the black anymore and lasted for a couple of years. This year i noticed it was coming back so i sprayed it again. this time i noticed improvement the next day and couple weeks it was completely gone. also, sprayed around the vent form microwave and stove that gets the black algae and it took care of that. Only negative was our Fushia's and rhododendron developed yellow spots on leaves so next time i sprayed i covered with Visqueen.
2 people found this helpful
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Reviewed in the United States on March 29, 2023
Size: 128 Fluid OuncesStyle: RemoverVerified Purchase
I have used this product on driveways, unpainted fences, rock retaining walls, concrete blocks, brick walls unpolished landcape granite stones, paved pathways and composite decks. It cleans so well, that it eliminates need to pressure wash. Concrete Driveway was almost black, before application, however, now it has a newly laid look. I have been using his product near plants (not edible) and have noticed no damage. Yes, its hard to control overspray 100% of time. I love that rain, snow, wind are also the cleaning agents and I dont need to waste any additional water in cleaning. Water is expensive. Rock retaining walls look like newly installed and just made, after using this product. I have had people think 10 year old walls were installed a month ago. I also use it on pebble bed to keep cobblestones looking clean. It works. It keeps fences clean even after 2 years of application. It doesnt seem to attract as much moss, lichen mold etc. It does give it weathered clean light grey/whitish look, which I dont mind. It does NOT give a fresh brown wood look, like if you pressure washed it.
One needs to be patient after using the product. It works slowly over a year. The best time to apply it is dry fall day, so the rains can help with cleaning, not to mention winter snow. After that once a year to year and a half, maintainence is more than enough. And come spring and summer, you can enjoy the cleaner surfaces.

I also used it on cedar roof. I did excellent job with it. However, the roof was old and leaked after this application, requiring me to change the roof. My theory could be a combination of any: 1) It actually started eating the moss and mold between cedar shakes, that was actually like a barrier for water somewhat. my cedar shakes had only 2 to 5 years of life left and potentially cleaning it, reduced its life 2) I walked on roof to apply the product which could have strained old shakes. - There are special shoe fasteners that I overlooked wearing. The house damage was negligible and very promptly addressed, though I wish I didnt have that extra expense. That said, I would stay out of the roof - for the rest of my life and have a professional take care of business.

I almost always have extra bottles on hand. It is extremely helpful to have a battery sprayer. I used a 1 gallon manual one for years and it works just fine. Battery sprayer is way faster and probably reduces the time by three quarters.

i have not tried the other product from wet and forget that connects to the hose. Many have found difficulty in the way the spray works. I dont want to try something new when this works great.

Moss, slowly wears off. Lichen growing on organic surfaces is the hardest, but it loosens that up too. I noticed that the lichen dries up and does not grow even after 2 years of application. I have used this product over 10 years now and this is a cumulative review.
70 people found this helpful
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Reviewed in the United States on March 18, 2024
Size: 128 Fluid OuncesStyle: RemoverVerified Purchase
We live in hot 'n humid Florida. We have a sunroom that has a white metal roof that is usually half in the shade if not more at times. It gets really really green with heavy algae growth! In the past I used 30 Second cleaner, a long handled stiff scrub brush and drug a hose up on the roof. After several saturation with the cleaner, multiple scrubbing and housings it was clean for another few months. I had serious doubts when I ordered Wet & Forget especially when people said be patient it takes 2 to 3 months to work. So I followed the directions, sprayed it on the horrible green roof, marked my calendar, set a remember for 10 weeks and forgot about it. I got up on our roof and the green algae is gone!! No more scrubbing & hosing on a wet slippery metal roof. This stuff really works but you just have to give it time. Thanks for a great product.
9 people found this helpful
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Reviewed in the United States on April 30, 2024
Size: 128 Fluid OuncesStyle: RemoverVerified Purchase
Works very well if you don't mind waiting. It's not like bleach were you see the results instantly. This product works very slow which makes it safer and more long lasting, especially on roof shingles.
Works great on Trex that tends to get mildew after a few years.

Top reviews from other countries

Shivam Soni
5.0 out of 5 stars Product is very good and customer Happy..
Reviewed in India on February 23, 2022
Size: 128 Fluid OuncesStyle: RemoverVerified Purchase
Good product customer Very Happy
One person found this helpful
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Amazon Customer
5.0 out of 5 stars Good
Reviewed in India on January 26, 2020
Size: 128 Fluid OuncesStyle: RemoverVerified Purchase
Effective
Mrs. Dorothy Hazlewood
5.0 out of 5 stars Five Stars
Reviewed in the United Kingdom on July 24, 2017
Size: 128 Fluid OuncesStyle: RemoverVerified Purchase
Appears to be working well

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