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Wet & Forget Outdoor Moss, Mold, Mildew, & Algae Stain Remover Multi-Surface Cleaner, Ready to Use, 64 Ounce

4.0 4.0 out of 5 stars 12,721 ratings

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64 Fluid Ounces
Ready to Use
Outdoor Remover

Purchase options and add-ons

Brand Wet & Forget
Item Weight 4 Pounds
Liquid Volume 64 Fluid Ounces
Item Form Liquid
Coverage 60 - 180 square feet

About this item

  • Wet & Forget Ready To Use Outdoor Cleaner comes with a high-capacity trigger sprayer for quick application to smaller surfaces; 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, porch steps, headstones, fountains, planters, concrete, canvas, and upholstery
  • Use attached sprayer apply generously to 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
  • 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
  • Each bottle has an unlimited shelf life and treats 60 - 180 square feet, heavy stained and porous surfaces will absorb more product

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From the manufacturer

Wet And Forget
Ready-To-Use

FEATURES

mother nature

long lasting

no power washing

No scrubbing

Use Wet And Forget To Clean

stone

planter

cement

pillar

Hose End Hose Refill concentrate Concentrate Ready To Use
BUY BUY BUY BUY BUY
Customer Reviews
4.0 out of 5 stars
30
4.4 out of 5 stars
890
4.3 out of 5 stars
5,421
4.4 out of 5 stars
9,561
4.0 out of 5 stars
12,721
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 Outdoor Cleaner in the ready to use version with included sprayer is ideal for quick application to small surfaces. Apply generously to a dry surface on a cool dry day. That’s it! Just wet it and forget it. Wet & Forget Outdoor eliminates black and green stains caused by moss, mold, mildew and algae without any scrubbing, power washing or using bleach. Wet & Forget Outdoor goes to work with the wind and rain to gently clean the surface over time. Green stains generally clean up within a few weeks. Black stains or heavy stubborn stains may take 6-12 months to fully clean up. Be Patient, Good Things Take Time! Wet & Forget Outdoor properly cleans surfaces, so they can stay clean up to 1 year or longer. Repeat application yearly or when new stains appear to maintain a clean surface. Wet & Forget Outdoor Ready to Use contains no bleach and is safe to use on any type of surface and is great for headstones, planters, statues, windowsills, screens, and outdoor furniture. Wet & Forget Outdoor will cover 60 - 180 square feet 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 ‏ : ‎ No
  • Product Dimensions ‏ : ‎ 3 x 6 x 9 inches; 4 Pounds
  • Item model number ‏ : ‎ E804064
  • Department ‏ : ‎ Unisex-Adult
  • Date First Available ‏ : ‎ June 20, 2016
  • Manufacturer ‏ : ‎ Wet and Forget
  • ASIN ‏ : ‎ B01MA6BG4U
  • Country of Origin ‏ : ‎ USA
  • Customer Reviews:
    4.0 4.0 out of 5 stars 12,721 ratings

Product guides and documents

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Customer reviews

4 out of 5 stars
4 out of 5
12,721 global ratings

Customers say

Customers like the ease of use of the weed moss control agent. They say it's very easy to apply and convenient. However, some customers feel the value of the product is not worth the money. Customers also differ on the effect on mold, quality, and performance.

AI-generated from the text of customer reviews

229 customers mention177 positive52 negative

Customers find the weed moss control agent easy to use and convenient. They mention that it comes with a built-in sprayer and a detached sprayer. Some say that the area has gradually improved over time.

"...in cold weather, but not freezing cold. The product came with a detached sprayer, so I found myself lugging the bottle in one hand and..." Read more

"Gone are the days of scrubbing outdoors with bleach. Wet & Set is so easy to use. No scrubbing & no rinsing & no strong odors...." Read more

"...(just in case) and patch tested it and, as others said, it was easy to use and within a day some parts were already clear...." Read more

"...But I will say the spray handle it comes with is IMPOSSIBLE and the manufacturer would have higher reviews if they got rid of the spray handle they..." Read more

871 customers mention368 positive503 negative

Customers are mixed about the performance of the weed moss control agent. Some mention it works really well, is easy to apply, and gets the job done. However, others say that it didn't work the first time, didn''t do great for the mosses, and that it takes some time for it to work.

"...the green mold, but a bit of dirt sometimes remains, so results do not always look perfect, but the mold is gone and seems to stay gone. I..." Read more

"...is probably a solution that would work for you as it was effective for that limited purpose...." Read more

"...It just takes some time for it to work. Good stuff but patience is required for the final results to show...." Read more

"...(I am in Northern California) but I am telling you THIS WORKS REALLY REALLY WELL as long as you use a garden sprayer and saturate...." Read more

233 customers mention120 positive113 negative

Customers are mixed about the quality of the weed moss control agent. Some mention that it's still clean after a year, the furniture cleaned up well after the first use, and it'd be a great product for cleaning outdoors. However, others say that black stains can take several months to remove, long-established stains may take 6-12 months, and that the product doesn't remove old stains well.

"...After two weeks, the panels I had sprayed were quite clean, as you can see in the photo...." Read more

"...It was no longer green with algae. The algie look grey, dust, and brittle...." Read more

"...Wet & Set is so easy to use. No scrubbing & no rinsing & no strong odors. Works great on pavers or anything outdoors with mold, algae and mildew...." Read more

"...One minor complaint: the sprayer is not high enough quality...." Read more

222 customers mention132 positive90 negative

Customers are mixed about the effect on mold. Some mention that it completely got rid of the mold on a small section of their roof, while others say that it didn't remove the mold.

"...This product kills the green mold, but a bit of dirt sometimes remains, so results do not always look perfect, but the mold is gone and seems to..." Read more

"...When I finaly got back to the headstone. It was no longer green with algae. The algie look grey, dust, and brittle...." Read more

"I didn’t do anything on my outdoor carpet, but it was effective in removing mold on my shower wood non-slip grate...." Read more

"...This is a great product also! It takes care of the mold on my siding very well...." Read more

37 customers mention19 positive18 negative

Customers are mixed about the color of the weed moss control agent. Some mention that it takes the green off the wood fence and within 30 minutes. However, others say that it turns the area a little bit yellow.

"...After a friend asked me about it, I went out to look, and all of the green was gone. Easy to use." Read more

"...It was no longer green with algae. The algie look grey, dust, and brittle...." Read more

"...and looked at these items and they were clean and the green on the wood fence is GONE!. I decided to get online and purchase some more...." Read more

"...I test sprayed in the landscape timber shot does show some minor yellowing on one cluster, but the bulk of that piece and the remainder of the moss..." Read more

26 customers mention17 positive9 negative

Customers are mixed about the safety of the weed moss control agent. Some mention it's safe for plants and easy to use, while others say it didn't kill anything and is very toxic to pets.

"...But it also keeps your walkways and patios free from the slippery green slime." Read more

"...I bought this one because it appears to be the least toxic option." Read more

"...It's also hazardous for kids until its been flushed with water a day later. Adding to that you are expected to re-apply it every 1-2 months...." Read more

"...Love that it's non-toxic!" Read more

167 customers mention33 positive134 negative

Customers are dissatisfied with the value of the weed moss control agent. They mention that it's too expensive for what it does, and a scam.

"...The downside is it’s used up fast and it’s not inexpensive. So it’s an investment to rid oneself of moss...." Read more

"It did get rid of the green on my driveway but it is too expensive for what it does...." Read more

"...It's definitely not WET and FORGET, and it's quite pricey...." Read more

"...Too expensive for my budget." Read more

26 customers mention2 positive24 negative

Customers are dissatisfied with the leaking of the weed moss control agent. They mention that the cap leaks, the spray nozzle leaks more than it sprayed, and the package was not sealed properly. The cap was loose and the chemical leaked into other items shipped.

"...Also from pump 1 the pump/spray nozzle leaked more than it sprayed...." Read more

"...sure you open it right away because in my case some of it had leaked out of bottle even through the plastic that was wrapped around the bottle...." Read more

"...was encased in a plastic pkg, which is good because it actually leaked quite a bit. So maybe the seal on the container can be improved?..." Read more

"there is a small leak in the bottle - packaging was wet on arrival. Hoping it works. Transferring to another spray bottle...." Read more

Minor Effectiveness, but Difficult Appliacation
3 Stars
Minor Effectiveness, but Difficult Appliacation
We live in an area where the front yard gets a lot of shade and we are 'blessed' with algae, moss, mold, and mildew problems in those areas that need to be treated every now and then. A spray and forget product is the ideal solution for treatment vs anything that needs to have a scrubbing follow up. This seemed like it might do that from some of the reviews, but not so much.Application. The product is designed to be generously spread over the effected area using the included pump handle. While this would probably be effective for spot treatments, any larger area requires you to repeatedly pull the spray pump handle and soak one spot at a time over the entire area you want to cover. This becomes repetitive and painful if trying to do in in one go. Maybe transferring it to your pump sprayer would make it easier, but they get a 1-star as is it set up now. The coverage also leaves a lot to be desired. I was able to treat only a few sidewalk sections and a small part of the porch during this test run.Effectiveness. Half credit here. The product is designed to work its magic and then let rain and wind remove the remains for your cleanup. I sprayed on a Friday and the end of the next week we had our first wind/rain event. The mildewy green on the sidewalk sections did almost have most of their green topcoat cleared up in the first few days, but it was not 100% effective. The walk pictures here show the before and after shots and this was where it did the most good. The porch shots show the darker mold coverage that looking now it claims will take several months to remove. That's just not effective. Going out during the rain, I was able to foot scrub one of the darker spots that looks a little lighter in the after photo, but the rain poring on it was not cleaning it at all. So the Forget part of the spray and forget may work, but I can't have a product that takes months to finish. As for moss, the stonework around the flowerbed in the before and after shots show basically no effect whatsoever. The moss I test sprayed in the landscape timber shot does show some minor yellowing on one cluster, but the bulk of that piece and the remainder of the moss along it is still growing strong. Spraying the porch brickwork also yielded minimal results.So, overall, if you have the light green algae/mildewy coating on a relatively non-porous sidewalk, this is probably a solution that would work for you as it was effective for that limited purpose. Anything tougher I would suggest you pass on this for something stronger.
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Top reviews from the United States

Reviewed in the United States on February 14, 2022
Size: 64 Fluid OuncesStyle: Ready to UsePattern Name: Outdoor RemoverVerified Purchase
Customer image
5.0 out of 5 stars Works well, slowly
Reviewed in the United States on February 14, 2022
I did a test — see photo — plastic fence was moldy after several years, so I sprayed half the panels with this product (on the right) and sprayed with water as a control (on the left). After two weeks, the panels I had sprayed were quite clean, as you can see in the photo. (Photo was taken a few months later, in winter, of two panels.)
I have had similarly strikingly good results on the vinyl siding of my house.
Note, that along with mold there is often trapped dirt. This product kills the green mold, but a bit of dirt sometimes remains, so results do not always look perfect, but the mold is gone and seems to stay gone.
I have been very careful, as instructions say, not to spray on any plants, and to wear gloves, and not to breathe it in. When I researched this, I read that this is the same anti-mold chemical that hospitals use. And indeed, having worked in a hospital, this is what some of their chemicals smell like (not alcohol, a different smell.) Don’t use it if it will rain in a day or two; it must dry onto the surface you are cleaning. You can use it in cold weather, but not freezing cold.
The product came with a detached sprayer, so I found myself lugging the bottle in one hand and spraying with the other hand, which was perfect. I much prefer doing that rather than buying the version that attaches to your hose, which does not seem as precise a delivery mechanism.
Product also warns not to spray on anything that little kids will be playing on, or around, e.g. kids’ toys I suppose or jungle gyms that might get this on their hands and then into their mouths. I would also keep it away from any gardening areas, since molds and fungus can be an important contributor to soil fertility.
The reason I wanted to use this method rather than power washing is largely because power washing is known to force water in between the cracks of vinyl siding and mess up the interior of houses. I didn’t want to risk that. But, on the other hand, this certainly is a strong chemical.
Images in this review
Customer image
Customer image
38 people found this helpful
Report
Reviewed in the United States on November 10, 2023
Size: 64 Fluid OuncesStyle: Ready to UsePattern Name: Outdoor RemoverVerified Purchase
5 people found this helpful
Report
Reviewed in the United States on January 1, 2024
Size: 64 Fluid OuncesStyle: Ready to UsePattern Name: Outdoor RemoverVerified Purchase
One person found this helpful
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Reviewed in the United States on June 25, 2022
Size: 64 Fluid OuncesStyle: Ready to UsePattern Name: Outdoor RemoverVerified Purchase
Customer image
3.0 out of 5 stars Minor Effectiveness, but Difficult Appliacation
Reviewed in the United States on June 25, 2022
We live in an area where the front yard gets a lot of shade and we are 'blessed' with algae, moss, mold, and mildew problems in those areas that need to be treated every now and then. A spray and forget product is the ideal solution for treatment vs anything that needs to have a scrubbing follow up. This seemed like it might do that from some of the reviews, but not so much.

Application. The product is designed to be generously spread over the effected area using the included pump handle. While this would probably be effective for spot treatments, any larger area requires you to repeatedly pull the spray pump handle and soak one spot at a time over the entire area you want to cover. This becomes repetitive and painful if trying to do in in one go. Maybe transferring it to your pump sprayer would make it easier, but they get a 1-star as is it set up now. The coverage also leaves a lot to be desired. I was able to treat only a few sidewalk sections and a small part of the porch during this test run.

Effectiveness. Half credit here. The product is designed to work its magic and then let rain and wind remove the remains for your cleanup. I sprayed on a Friday and the end of the next week we had our first wind/rain event. The mildewy green on the sidewalk sections did almost have most of their green topcoat cleared up in the first few days, but it was not 100% effective. The walk pictures here show the before and after shots and this was where it did the most good. The porch shots show the darker mold coverage that looking now it claims will take several months to remove. That's just not effective. Going out during the rain, I was able to foot scrub one of the darker spots that looks a little lighter in the after photo, but the rain poring on it was not cleaning it at all. So the Forget part of the spray and forget may work, but I can't have a product that takes months to finish. As for moss, the stonework around the flowerbed in the before and after shots show basically no effect whatsoever. The moss I test sprayed in the landscape timber shot does show some minor yellowing on one cluster, but the bulk of that piece and the remainder of the moss along it is still growing strong. Spraying the porch brickwork also yielded minimal results.

So, overall, if you have the light green algae/mildewy coating on a relatively non-porous sidewalk, this is probably a solution that would work for you as it was effective for that limited purpose. Anything tougher I would suggest you pass on this for something stronger.
Images in this review
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Customer imageCustomer imageCustomer imageCustomer imageCustomer imageCustomer imageCustomer imageCustomer imageCustomer image
41 people found this helpful
Report
Reviewed in the United States on March 15, 2024
Size: 64 Fluid OuncesStyle: Ready to UsePattern Name: Outdoor RemoverVerified Purchase
Reviewed in the United States on February 25, 2024
Size: 64 Fluid OuncesStyle: Ready to UsePattern Name: Outdoor RemoverVerified Purchase
5 people found this helpful
Report

Top reviews from other countries

Dave D
4.0 out of 5 stars pleasantly surprised how well it worked.
Reviewed in Singapore on October 25, 2023
Size: 64 Fluid OuncesStyle: Ready to UsePattern Name: Outdoor RemoverVerified Purchase
Customer image
Dave D
4.0 out of 5 stars pleasantly surprised how well it worked.
Reviewed in Singapore on October 25, 2023
I was very surprised how well this worked. The side of my house (see red highlight in pic) had algae growing on it. I sprayed on wet & forget and within a few days can see an amazing result. I will definitely buy it again.
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Customer imageCustomer image
Wen Shan Wendy Chow
4.0 out of 5 stars How long will the black stains disappear?
Reviewed in Singapore on August 19, 2021
Size: 64 Fluid OuncesStyle: Ready to UsePattern Name: Outdoor RemoverVerified Purchase
Customer image
Wen Shan Wendy Chow
4.0 out of 5 stars How long will the black stains disappear?
Reviewed in Singapore on August 19, 2021
I spray Wet & Forget Outdoor on 30th July 2021 on a external wall, the algae disappeared in 1-2 weeks.
now (19th August 2021) there are some black stains left, I am not sure if those stains are dead algae, mold, or mildew, need to wait for a few months to see the effectiveness since the wall was sprayed 20 days only.
Images in this review
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Customer image

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