---
product_id: 6510005
title: "BUY"
brand: "wet & forget"
price: "€ 77.10"
currency: EUR
in_stock: null
reviews_count: 4
category: "Wet & Forget"
url: https://www.desertcart.nl/products/6510005-buy
store_origin: NL
region: Netherlands
---

# Moss & algae stain removal No rinsing or scrubbing needed Covers up to 1,125 sq. ft. BUY

**Brand:** wet & forget
**Price:** € 77.10
**Availability:** ❌ Out of Stock

## Summary

> 🌟 Spray it, forget it, flaunt it — your outdoor glow-up starts now!

## Quick Answers

- **What is this?** BUY by wet & forget
- **How much does it cost?** € 77.10 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.nl](https://www.desertcart.nl/products/6510005-buy)

## Best For

- wet & forget enthusiasts

## Why This Product

- Trusted wet & forget brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Long-Lasting Clean:** Keeps surfaces spotless for up to a year, so your home stays guest-ready season after season.
- • **Concentrated Coverage:** One bottle treats up to 1,125 sq. ft., making it a cost-effective solution for large outdoor spaces.
- • **Eco-Conscious Formula:** Bleach-free and non-acidic, protecting your plants and the environment while delivering powerful results.
- • **Versatile Surface Power:** Safe and effective on patios, roofs, decks, vinyl, wood, sealed concrete, and more.
- • **Effortless Outdoor Renewal:** Just spray and forget—no scrubbing or rinsing required, saving you time and energy.

## Overview

Wet & Forget Outdoor Cleaner Concentrate is a powerful, bleach-free formula designed to remove moss, mold, mildew, and algae stains from hard, sealed non-porous surfaces. Simply dilute and spray; no scrubbing or rinsing needed. It works gradually with wind and rain to restore and maintain outdoor surfaces for up to a year, covering between 375 and 1,125 square feet per bottle depending on stain severity.

## Description

Wet & Forget Outdoor Cleaner Concentrate eliminates black and green stains caused by mold, mildew and algae stains without scrubbing, power washing or using bleach. Just mix 5 parts water with 1 part Wet & Forget in a pump up garden sprayer and apply to the surface - that's it! Wet & Forget goes to work with the wind and rain to gently clean the surface over time. Green stains clean up within a few days or weeks. Black stains generally clean up in 4-6 weeks. Black roof stains or stains that have been on the surface for many years can take up to 6 months to come clean. Be Patient, Good Things Take Time! Surfaces are properly cleaned so you get an extended clean. Surfaces stay clean up to 1 year or longer. Re-apply at the first sign of reoccurrence or annually. Use Wet & Forget on decks, siding, roofs, walkways, patios, sealed brick, sealed cement, or any hard, non-porous outdoor surface. Half-Gallon Concentrate makes 3-Gallons and covers 375-1, 125 sq. ft. depending upon severity of the stain and porosity of the surface.

Review: Works Slowly Even if You are Inept! - I have wondered if I could make my driveway and concrete areas look better for years, but my husband wasn't interested in doing the job, and for 27 years he took care of all the outside jobs. We hired a pressure cleaning man now and then, but it never lasted and was not cheap. When my husband divorced me in April 2013, I thought, "Why not try this myself?" So I did. Now let me make it clear that I'm not exactly outdoorsy or experienced at such jobs. I've never pressure cleaned a house or driveway, and don't have the equipment for it. So I figured it needed to work just as the name said: Wet and Forget. And I would say that is the beauty of it. So the hardest thing about this product was figuring out how to apply it without a good sprayer. That is half the battle. It's not hard to figure out how to dilute it, and it really doesn't require scrubbing. . . what it requires is time. And a good sprayer would certainly help! This is not the product you buy because you have a large outdoor party with guests you want to impress next week. This is a product you apply because you want your driveway/concrete areas to look great in a few months. This is not a product you apply if you want absolute white glove perfection quickly, but you simply want your concrete to look a lot nicer for a long time without much money or effort. I took some before and after pictures, and the results are dramatic. In fact, the longer you wait, the better it looks. I guess that sun and rain are what make it work. I applied it on Monday, May 13 in the late afternoon and I'm writing this review almost 7 weeks later. My pathetic sprayer didn't work (I had never bought or used one before, so don't even think about one of those battery-powered Amdro Sprayers from Walmart--they are not any good), so I emptied and washed out a bottle of Fantastic and filled that spray bottle with the solution, diluted according to the directions. Obviously, I couldn't get much done that way, and realized I would need to find a better sprayer. But I was determined, and there were some seriously darkened, moldy-looking white urns beside my garage door that I sprayed well and some of the concrete around them. I sprayed the white garage door of our storage shed as well. I was by no means very good at this, and decided to do an experiment with the last half of the bottle, since my hands were cramping from trying to use the Fantastic bottle for so long. There is a concrete pad in my backyard where my ex used to keep a gigantic telescope that is now gone. So I poured the rest of the bottle on half of it a little at a time, spreading it with a stiff broom brush. After 7 weeks, the results are dramatic. The urns and garage door and concrete around them look so much better. The concrete telescope pad is nearly white on the treated half, and still ugly, stained and dark-looking on the other half. Two weeks ago I used another very bizarre sprayer my ex left behind called "The Chameleon," to do the rest of the driveway. This sprayer hooks up to the garden hose, making it very chancy that the ratio of water to Wet and Forget is correct. This is another sprayer you should not buy, and I can see why my ex left it behind. Anyway, the driveway looks a little cleaner and brighter every day after 2 weeks. My conclusion is that if you have a good backpack sprayer, and want to see your concrete looking better by next season, you will be delighted. And even if you inept, you will get results. However, do yourself a favor and buy a good sprayer. I plan to buy a good sprayer for my weeds and another bottle of Wet and Forget to finish what I started.
Review: Get THIS one - Watching a few YT reviews of this stuff, one made the comment that the 'concentrate' ( ie: not the hose end sprayer kind) worked better on their roof than the other version. Both do work, but the concentrate is supposedly stronger. So, we got both. ( Can use the sprayer kind on the house...) Mixed up a five gallon bucket with the recommended proportions of concentrate to water (gave a bit more of the concentrate just because)... filled the bucket about half way... grabbed a long handled brush (car wash at home type brush) and went out onto our north facing porch roof where moss and scales were present on the section that wasn't pre power washed. Directions say to 'soak' the water formula into the shingles, and it does stay in place... for the most part. (Dirty water will run off the roof... in fact, the water will get disgustingly brown... but keep soaking all of the shingles.) Also did another section of a lower roof with another batch and still have about 1/3 of bottle left. Looking at the treated roofs through our windows a few weeks later, we can see the scale area has dried ... the moss isn't there... but it is nice to know that the product is working (it was soaked into the shingles) and will continue to work using a chemical way to kill the scale and moss growth. We didn't treat the main roof of our house, only the north facing lower roof areas that had moss/scale that we could reach ourselves or by using a rented lift we had for another project. For hard to reach high areas, we would consider using the hose end spray version of this product. Next treatment for the lower roof sections ( next summer or so) we will use the concentrate again. Good stuff.

## Features

- Concentrate outdoor cleaner removes stains caused by moss, mold, mildew, and algae with no scrubbing or rinsing, just wet it and forget it for hard, sealed non-porous surface including driveway, patio, roof, siding, deck, vinyl, wood, sealed concrete, canvas, aluminum, and upholstery
- Dilute 1 part Outdoor to 5 parts water, apply with a garden sprayer generously to a dry, debris-free surface in mild climate, do not rinse or apply when rain is expected 4-5 hours after application; unused solution can be stored in sprayer for next use
- 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 375 - 1,125 square feet, heavy stained and porous surfaces will absorb more product

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B001GTRBMO |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #19,989 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #11 in Moss Control |
| Color | Original |
| Coverage | 375 - 1,125 square feet |
| Customer Reviews | 4.4 4.4 out of 5 stars (5,686) |
| Date First Available | September 27, 2008 |
| Included Components | Bottle, liquid |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Item Weight | 1 pounds |
| Item model number | E800003 |
| Manufacturer | Wet & Forget USA |
| Material | Aluminum/PVC/Stone |
| Part Number | E800003 |
| Product Dimensions | 6.5 x 3.25 x 9.25 inches |
| Size | 64 Fl Oz (Pack of 1) |
| Special Features | Non Abrasive |
| Style | 64 oz |
| Usage | Roof |
| Volume | 64 Fluid Ounces |
| Warranty Description | Warranty |

## Product Details

- **Brand:** Wet & Forget
- **Item Form:** Liquid
- **Material Feature:** Concentrate cleaner
- **Scent:** Unscented
- **Specific Uses For Product:** Roof

## Images

![BUY - Image 1](https://m.media-amazon.com/images/I/61DKJsSBR5L.jpg)

## Questions & Answers

**Q: can I use it on inside walls**
A: You can, but I would not advise doing so without a respirator with fresh air tank if you are planning on spraying it.  This stuff is potentially dangerous at full strength and breathing it even when diluted would be hazardous.  Danger is very much related to concentration with this product and it does not take a lot.    The active ingredient is        N-Dodecyl/tetradecyl-N, N-dimethyl benzyl ammonium chloride also referred to as  Benzalkonium Chloride.  The following website gives the best description of the active ingredient and its uses:   http://hztopchem.en.alibaba.com/product/989324687-219024270/Dodecyl_Dimethyl_Benzyl_ammonium_Chloride_1227_8001_54_5_63449_41_2_139_07_1.html#!   Personally, I love this product for outdoor use , but see no need to use it indoors.  A light bleach solution and/or simple soap and water and proper drying are a  much safer indoor alternative.  The company does offer an already diluted formula for use in indoor showers but I have not tried that product yet.  If you do use it indoors please be certain of your math/calculations when diluting it and do not inhale any mist if sprayed.  I am not the paranoid type.  This is potent and must be handled with care.Also, as another responder pointed out.  It does not rain inside, so you would see no removal of existing mold and stains with this product .  It would only serve as a mold preventer.  Even outside, the cleaning action is provided by the elements, namely rain and sun, the product simply kills the existing mold and prevents new mold growth.

**Q: will it clean my pavers from water rust ? They turn brown from water deposit**
A: Just had to jump in....Bleach is absolutely NOT hydrochloric acid.
 It is actually Sodium Hypochlorite. Completely different stuff.
 While bleach cleans, sanitizes, and kills algae and mildew well, it is also pretty harsh and corrosive. 
 It is also totally ineffective on rust/iron stains.

**Q: I have plants and grass all around my house, if I use on my roof will it kill the plants below?**
A: my understanding is, if you wet the grass first it should be ok. I have had no problem with plants at a cemetery when treating a headstone.

**Q: What is the size of the bottle, how many gallons does it make?**
A: This product comes in three sizes, as far as I know: 1/2 gallon, 3/4 gallon, and 1 gallon.  The dilutions with water are all the same so be careful of the price!

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works Slowly Even if You are Inept!
*by L***2 on June 29, 2013*

I have wondered if I could make my driveway and concrete areas look better for years, but my husband wasn't interested in doing the job, and for 27 years he took care of all the outside jobs. We hired a pressure cleaning man now and then, but it never lasted and was not cheap. When my husband divorced me in April 2013, I thought, "Why not try this myself?" So I did. Now let me make it clear that I'm not exactly outdoorsy or experienced at such jobs. I've never pressure cleaned a house or driveway, and don't have the equipment for it. So I figured it needed to work just as the name said: Wet and Forget. And I would say that is the beauty of it. So the hardest thing about this product was figuring out how to apply it without a good sprayer. That is half the battle. It's not hard to figure out how to dilute it, and it really doesn't require scrubbing. . . what it requires is time. And a good sprayer would certainly help! This is not the product you buy because you have a large outdoor party with guests you want to impress next week. This is a product you apply because you want your driveway/concrete areas to look great in a few months. This is not a product you apply if you want absolute white glove perfection quickly, but you simply want your concrete to look a lot nicer for a long time without much money or effort. I took some before and after pictures, and the results are dramatic. In fact, the longer you wait, the better it looks. I guess that sun and rain are what make it work. I applied it on Monday, May 13 in the late afternoon and I'm writing this review almost 7 weeks later. My pathetic sprayer didn't work (I had never bought or used one before, so don't even think about one of those battery-powered Amdro Sprayers from Walmart--they are not any good), so I emptied and washed out a bottle of Fantastic and filled that spray bottle with the solution, diluted according to the directions. Obviously, I couldn't get much done that way, and realized I would need to find a better sprayer. But I was determined, and there were some seriously darkened, moldy-looking white urns beside my garage door that I sprayed well and some of the concrete around them. I sprayed the white garage door of our storage shed as well. I was by no means very good at this, and decided to do an experiment with the last half of the bottle, since my hands were cramping from trying to use the Fantastic bottle for so long. There is a concrete pad in my backyard where my ex used to keep a gigantic telescope that is now gone. So I poured the rest of the bottle on half of it a little at a time, spreading it with a stiff broom brush. After 7 weeks, the results are dramatic. The urns and garage door and concrete around them look so much better. The concrete telescope pad is nearly white on the treated half, and still ugly, stained and dark-looking on the other half. Two weeks ago I used another very bizarre sprayer my ex left behind called "The Chameleon," to do the rest of the driveway. This sprayer hooks up to the garden hose, making it very chancy that the ratio of water to Wet and Forget is correct. This is another sprayer you should not buy, and I can see why my ex left it behind. Anyway, the driveway looks a little cleaner and brighter every day after 2 weeks. My conclusion is that if you have a good backpack sprayer, and want to see your concrete looking better by next season, you will be delighted. And even if you inept, you will get results. However, do yourself a favor and buy a good sprayer. I plan to buy a good sprayer for my weeds and another bottle of Wet and Forget to finish what I started.

### ⭐⭐⭐⭐⭐ Get THIS one
*by R***D on August 27, 2024*

Watching a few YT reviews of this stuff, one made the comment that the 'concentrate' ( ie: not the hose end sprayer kind) worked better on their roof than the other version. Both do work, but the concentrate is supposedly stronger. So, we got both. ( Can use the sprayer kind on the house...) Mixed up a five gallon bucket with the recommended proportions of concentrate to water (gave a bit more of the concentrate just because)... filled the bucket about half way... grabbed a long handled brush (car wash at home type brush) and went out onto our north facing porch roof where moss and scales were present on the section that wasn't pre power washed. Directions say to 'soak' the water formula into the shingles, and it does stay in place... for the most part. (Dirty water will run off the roof... in fact, the water will get disgustingly brown... but keep soaking all of the shingles.) Also did another section of a lower roof with another batch and still have about 1/3 of bottle left. Looking at the treated roofs through our windows a few weeks later, we can see the scale area has dried ... the moss isn't there... but it is nice to know that the product is working (it was soaked into the shingles) and will continue to work using a chemical way to kill the scale and moss growth. We didn't treat the main roof of our house, only the north facing lower roof areas that had moss/scale that we could reach ourselves or by using a rented lift we had for another project. For hard to reach high areas, we would consider using the hose end spray version of this product. Next treatment for the lower roof sections ( next summer or so) we will use the concentrate again. Good stuff.

### ⭐⭐⭐⭐ Not as big as you imagine/pictured
*by T***T on June 13, 2024*

To be fair, the product itself works fine. It takes minimal effort and you get decent results. However, it only makes a total of 3 gallons from the concentrate. The container is smaller than I imagined and the quantity it makes is a bit disappointing, but other than that I'd order it again.

## Frequently Bought Together

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

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*Product available on Desertcart Netherlands*
*Store origin: NL*
*Last updated: 2026-01-23*