Wet & Forget 0.5-gal. Moss Mold Mildew and Algae Stain Remover-800003 - The Home Depot

Wet & Forget

Model # 800003

Internet # 203247152

0.5-gal. Moss Mold Mildew and Algae Stain Remover

Wet & Forget 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 & Forget .5 Gallon Moss, Mold, Mildew & Algae Stain Remover is the easy, one 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 & 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 & Forget works gently over time. Safe around plants and landscaping when used as directed.

  • Removes moss, mold, mildew and algae stains
  • Easy to use, one 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 gallons
  • 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.)  64.0 
Biodegradable  Yes  Concentrated  Yes 
Flammable  No  Indoor/Outdoor  Outdoor 
Odorless  No  Paint Product Type  Mold, Mildew and Stain Remover 
Prevents/blocks mold and mildew  No  Product Form  Liquid 
Product dispenser type  Plastic Bottle  Removes mold and mildew  Yes 
Returnable  30-Day  Rinse required  No 
Warranty / Certifications
Manufacturer Warranty  None 


Rated 3.5 out of 5 by 17 reviewers.
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 3.0 out of 5.0 by Jusy OK Did the job on green algae but didn't get rid of the black stains on the limestone. Been on for 6 weeks so may get rid of the black stains also as it supposedly can take up to 3 months. January 9, 2015
Rated 5.0 out of 5.0 by Does the job, am very pleased I applied this in the early spring 1-1/2 years ago on a stone patio and steps in a very humid, lakefront area in WV. Within a couple of months the areas were brighter and cleaner. I sprayed in the fall, and again the following spring and the patio area has never looked nicer. Great product, not as environmentally damaging as bleach, although you do have to be patient for results and remember to reapply occasionally in order to keep things looking good. I also used this on a bluestone patio at our primary residence in PA and have had the same great results. August 18, 2014
Rated 5.0 out of 5.0 by So far so great This product has been great so far. Sprayed concrete patio 3 weeks ago and there hasn't been any sign of new mildew growth. Very pleased. August 31, 2014
Rated 5.0 out of 5.0 by It Works It was very surprised, but it really works. It does take about two weeks of wait time to fully eliminate the mold and mildew. I plan to use it again in the Spring. August 12, 2014
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