---
product_id: 712917254
title: "Moss, Mold, Mildew, & Algae Stain Remover Multi-Surface Outdoor Cleaner Concentrate, Original, 128 Fluid Ounces"
brand: "wet & forget"
price: "HK$1091"
currency: HKD
in_stock: true
reviews_count: 6
url: https://www.desertcart.hk/products/712917254-moss-mold-mildew-and-algae-stain-remover-multi-surface-outdoor
store_origin: HK
region: Hong Kong
---

# Up to 1 year lasting clean No scrubbing or rinsing needed 128 fl oz concentrate Moss, Mold, Mildew, & Algae Stain Remover Multi-Surface Outdoor Cleaner Concentrate, Original, 128 Fluid Ounces

**Brand:** wet & forget
**Price:** HK$1091
**Availability:** ✅ In Stock

## Summary

> 🌿 Wet it, forget it, and flaunt spotless outdoors all year!

## Quick Answers

- **What is this?** Moss, Mold, Mildew, & Algae Stain Remover Multi-Surface Outdoor Cleaner Concentrate, Original, 128 Fluid Ounces by wet & forget
- **How much does it cost?** HK$1091 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hk](https://www.desertcart.hk/products/712917254-moss-mold-mildew-and-algae-stain-remover-multi-surface-outdoor)

## 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

- • **Concentrated Power:** 128 fl oz makes up to 6 gallons—covers up to 2,250 sq. ft. for maximum value
- • **Long-Lasting Protection:** Keeps moss, mold, mildew, and algae at bay for up to 12 months
- • **Versatile Surface Savior:** Safe on wood, concrete, vinyl, aluminum, and more—one cleaner for all your outdoor spaces
- • **Eco-Friendly & Bleach-Free:** Gentle on surfaces and the environment without harsh chemicals
- • **Effortless Outdoor Renewal:** Just spray, no scrubbing or rinsing—save time and energy

## Overview

Wet & Forget Moss, Mold, Mildew, & Algae Stain Remover is a powerful 128 fl oz concentrate designed for effortless outdoor cleaning. It removes stubborn green and black stains without scrubbing or rinsing, working gently with wind and rain. Safe for multiple surfaces including wood, concrete, and vinyl, it offers long-lasting protection up to a year, making it the ultimate low-maintenance solution for pristine outdoor spaces.

## 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. 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! 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

Review: Worst product - Waste of money and time, not beneficial at all.
Review: This stuff is incredible! I used several brands before I found this one, this one is the best buy a mile!! It not only removes the mold, but it keeps it from growing back for UP to year. It's easy to use, fast acting, keeps working for months. No rinsing, no scrubbing. Highly recommended ☆

## Features

- 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
- 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 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

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0DNGFBN8F |
| Batteries required | No |
| Best Sellers Rank | #148,179 in Health ( See Top 100 in Health ) #2,200 in All-Purpose Household Cleaners |
| Customer Reviews | 4.4 4.4 out of 5 stars (1,542) |
| Date First Available | 6 March 2025 |
| Is mould resistant | Bleach Free |
| Item model number | 800128-A |
| Item volume | 128 Fluid Ounces |
| Product Dimensions | 12.95 x 18.03 x 26.16 cm; 3.98 kg |
| Scent | Unscented |
| Specific uses | Concrete, Deck, Roof, Siding, Wood |

## Product Details

- **Brand:** Wet & Forget
- **Item form:** Liquid
- **Material features:** Fragrance Free
- **Scent:** Unscented
- **Specific uses for product:** Concrete, Deck, Roof, Siding, Wood

## Images

![Moss, Mold, Mildew, & Algae Stain Remover Multi-Surface Outdoor Cleaner Concentrate, Original, 128 Fluid Ounces - Image 1](https://m.media-amazon.com/images/I/513IEVJtoeL.jpg)

## Customer Reviews

### ⭐ Worst product
*by B***S on 11 September 2025*

Waste of money and time, not beneficial at all.

### ⭐⭐⭐⭐⭐ Review
*by J***N on 20 February 2026*

This stuff is incredible! I used several brands before I found this one, this one is the best buy a mile!! It not only removes the mold, but it keeps it from growing back for UP to year. It's easy to use, fast acting, keeps working for months. No rinsing, no scrubbing. Highly recommended ☆

### ⭐⭐⭐⭐⭐ Review
*by A***R on 10 November 2025*

This WnF is soooo great. A friend told me that the darkening of concrete over time is usually tiny black mold. WnF attacks that and brings your concrete bright again! Take before photos, apply, and then be patient. In 2-4 weeks you will see the result is bright white sidewalks and driveway, and very long-lasting. I regret pressure-washing my former driveway, as it removed small amounts of the surface; accelerating the concrete aging. However, WnF is not only easier, it lasts far longer than pressure-washing without removing parts of the surface. Because you need to wait weeks to see the result it is not as gratifying when applying. But know that it works; take before and after photos —or— test on one “square” of your sidewalk first. After a few weeks, that will be brighter than the adjacent squares. If you have green active growth on your stonework or shaded areas. You may notice it turn orange as the enzymes begin working. Any thick growth may later require removal, but WnF increases the length of time before growth returns. Usually several years in my experience. I use it on my concrete driveway, sidewalks, brick + mortar, and even the shaded side of my kids’ wooden playset roof. I used it on the padded portions of my boat trailer to make it look brand new, also. I am not an expert on what surfaces to avoid, but I avoid plants + grass and I allow to dry before my pets walk on it. Definitely purchase the concentrate and determine your own dilution. When I have tried the gardenhose-end variant of this WnF product, it appears less-effective. Always apply early morning or late evening so it can maximize before the sun evaporates. Also apply when you don’t think it will rain for 24 hours (turn off your sprinkler system for a day, if you have one). I hope that helps! I cannot say enough about how great this stuff works!

## Frequently Bought Together

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*Product available on Desertcart Hong Kong*
*Store origin: HK*
*Last updated: 2026-02-26*