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Wet & Forget

Model # 800003

Internet # 203247152

0.5 gal. Moss Mold Mildew and Algae Stain Remover

This item has been discontinued.
The Home Depot no longer carries this specific product.

$24.97 /each




Model # 800003

Internet # 203247152

Wet and Forget 0.5 gal. Moss, Mold, Mildew and Algae Stain Remover is the easy, 1-step solution to removing outdoor moss, mold, mildew and algae. No scrubbing, rinsing or power washing required. This EPA registered product is non-caustic, non-acidic and contains no bleach. Wet and Forget is safe to use on all outdoor surfaces. Simply dilute and apply with a pump up garden sprayer, then sit back and let Mother Nature do the rest. Wet and Forget works gently over time. Safe around plants and landscaping when used as directed.

  • Removes moss, mold, mildew and algae stains
  • Easy to use, 1-step application
  • Safe to use on any outdoor surface
  • Works great as a vinyl siding cleaner, deck cleaner (wood and composite), roof cleaner
  • Non-caustic, non-acidic, contains no bleach
  • No scrubbing, rinsing or pressure washing required
  • Gentle, biodegradable cleaning formula
  • Unlimited shelf life
  • Makes 3 gal.
  • Covers 375 to 1,125 sq. ft.
  • Subject to or will include a recycling fee in the following states: CA, OR
  • Does not ship to California- California residents please click here to purchase

Info & Guides

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Product Size (oz.) 
Paint Product Type 
Mold, Mildew and Stain Remover 
Prevents/blocks mold and mildew 
Product Form 
Product dispenser type 
Plastic Bottle 
Removes mold and mildew 
Rinse required 
Stain Type 
Surface Type 
Where to Use 
Warranty / Certifications
Manufacturer Warranty 


Rated 3.6 out of 5 by 22 reviewers.
Rated 5.0 out of 5.0 by Works This product works. I know for sure . I live in Naples Fl.. About as far south as you can go...mold on my tile roof has always been an issue. I applied as per the instructions. I waited for months and could not really tell how well it was working. So I went back up and walked around to look more closely . Yes, it was starting to work. Two months later I notices two rows of tiles on the back side that I had missed... It was so obvious . I reapplied and in 3 months my roof looked like new. Any one that says that it doesn't work is misapplying or doesn't have the patience and wants instant results. No odors or smell June 20, 2015
Rated 4.0 out of 5.0 by Ok for few weeks I've had it. I have only had this product for a couple of weeks and it is showing signs of approvement on my side walk. I have some moss on the side of house and it looks like it is dying because the moss has turn to an white then brown color and beginning to fall off. So for the few weeks I have use it it seems to be working. October 6, 2015
Rated 5.0 out of 5.0 by Wet and Forget I have read other reviews and I am truly amazed. It works beautifully in Central Florida on shady concrete with black mold building up. I have pressure washed every year for 16 years which is a tedious chore, spending hours trying to remove the mold. I used this on alternating sections of the sidewalk to give myself the ability to make a side by side comparison in different degrees of sunlight exposure. There was no reaction when it was applied, there was a very slight odor, but there was a little tint of wet look immediately after the application. One week later there was a visible difference. Each day after that resulted in less mold and discoloration. The sidewalk brightened up after about three weeks. I have now applied the product to the other sections that I skipped. I don't know why other reviews mention chemical reactions. color changes, and odors. I can only assume that there may have been other chemicals already on the sidewalk before trying to use this which resulted in some sort of reaction and maybe is preventing it from working as intended? So far it even removed the serious mold built up around my AC unit. That was real bad. I highly recommend this but make sure this is not being used after you have already attempted to use other cleaners - just a thought. I know I had not cleaned my walkway since last spring so there was nothing to react with this. May 20, 2014
Rated 4.0 out of 5.0 by I don't konw ehat to say This solution is supposed to work... but it takes several weeks to take effect. So I expect it to work, it was easy to apply. It is a concentrated formula that needs to be diluted. The preparation could have been made easier it the bottle were graduated or provided some means of measuring the dilutions. June 30, 2015
Rated 5.0 out of 5.0 by Worked as expected- very pleased! Followed instructions and applied to roof area where shady oak trees cause mildewy growth. Our green mildew was actually gone in about 2 weeks. It's been 3 months now and there is no sign of previous problem. Very, very happy with this product and will buy again if ever needed. September 13, 2015
Rated 5.0 out of 5.0 by This stuff really really works I had a family gravestone so full of lichen that it was just about unreadable. I found this and tried it and the lichen and moss just melted away. The stone looks like new. I only wish the local store stocked it but ordering on line was quick. January 1, 2013
Rated 5.0 out of 5.0 by HIGHEST RECOMMENDATION!! I was really skeptical that this product would do what it said of "just spray on and wind and rain will do the rest." Believe it or not, IT WORKED!! I had algae on my garage door and had to remove it. I sprayed it on as directed and it is almost all gone in just two weeks!! I would recommend it to anyone with a mold, mildew, algae, etc problem. March 28, 2013
Rated 5.0 out of 5.0 by Love this product and have been using it for years. Glad to finally see it at Home Depot! Love this product and have been using it for years. Glad to finally see it at Home Depot! April 3, 2012
  • 2015-11-23 T10:58:15.896-06:00
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