--- product_id: 712917254 title: "Moss, Mold, Mildew, & Algae Stain Remover Multi-Surface Outdoor Cleaner Concentrate, Original, 128 Fluid Ounces" brand: "wet & forget" price: "£75.47" currency: GBP in_stock: true reviews_count: 6 url: https://www.desertcart.co.uk/products/712917254-moss-mold-mildew-and-algae-stain-remover-multi-surface-outdoor store_origin: GB region: United Kingdom --- # 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:** £75.47 **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?** £75.47 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/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: Wet & Forget Moss, Mold, Mildew, & Algae Stain Remover Multi-Surface Outdoor Cleaner - If you are tired of the aggressive roar and back-breaking labor of a pressure washer, Wet & Forget is often cited as the "lazy person’s dream" for home maintenance. However, the name is a bit of a double-edged sword: you truly can "forget" the manual labor, but you also have to "forget" about seeing results for a few weeks (or months). How It Works: The "Slow Burn" Strategy Unlike bleach-based cleaners that whiten surfaces instantly through a chemical reaction, Wet & Forget uses a non-caustic, pH-neutral formula (primarily alkyl dimethyl benzyl ammonium chloride). • The Process: You spray the solution on a dry surface. It kills the organic growth (moss, mold, algae) at the root. • The "Worker": Once the organisms are dead, the weather takes over. Rain and wind gently wash away the dead debris over time. The Pros • Zero Scrubbing: This is the biggest selling point. You spray it on and walk away. No rinsing is required. • Surface Safe: Because it contains no bleach or ammonia, it won’t damage your siding, roof shingles, or deck finish. It’s also much safer for surrounding landscaping than harsh caustic cleaners. • Long-Lasting: Once a surface is clean, the residual effect of the product helps prevent regrowth for up to 12–18 months. • Reach: The "Xtreme Reach" hose-end version can spray up to 30 feet, allowing you to treat second-story siding or roofs without ever touching a ladder. The Cons • The Waiting Game: This is not for people prepping for a backyard party tomorrow. Green algae usually disappears in 1–2 weeks, but black mold or thick moss can take 3–6 months to fully clear. • Weather Dependent: You need a dry day for application (at least 4–5 hours of dry time), but then you need subsequent rain to actually wash the stains away. If you live in a drought-prone area, you might have to manually hose it down once a week to see progress. • Not for "Dirt": It only works on organic growth. It will not remove mud, clay, or grease stains. Wet & Forget is an elite product if you are a proactive maintenance-taker. If you apply it every spring as a preventative measure, your house will stay pristine year-round without you ever breaking a sweat. Pro Tip: If your concrete is currently "black" with years of buildup, hit it with a pressure washer once to get a clean slate, then apply Wet & Forget every year after to ensure you never have to pressure wash again. ## Technical Specifications | Specification | Value | |---------------|-------| | Brand | Wet & Forget | | Item form | Liquid | | Item volume | 128 Fluid Ounces | | Material features | Fragrance Free | | Scent | Unscented | | Specific uses for product | 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. ### ⭐⭐⭐⭐⭐ Wet & Forget Moss, Mold, Mildew, & Algae Stain Remover Multi-Surface Outdoor Cleaner *by F***1 on 12 May 2026* If you are tired of the aggressive roar and back-breaking labor of a pressure washer, Wet & Forget is often cited as the "lazy person’s dream" for home maintenance. However, the name is a bit of a double-edged sword: you truly can "forget" the manual labor, but you also have to "forget" about seeing results for a few weeks (or months). How It Works: The "Slow Burn" Strategy Unlike bleach-based cleaners that whiten surfaces instantly through a chemical reaction, Wet & Forget uses a non-caustic, pH-neutral formula (primarily alkyl dimethyl benzyl ammonium chloride). • The Process: You spray the solution on a dry surface. It kills the organic growth (moss, mold, algae) at the root. • The "Worker": Once the organisms are dead, the weather takes over. Rain and wind gently wash away the dead debris over time. The Pros • Zero Scrubbing: This is the biggest selling point. You spray it on and walk away. No rinsing is required. • Surface Safe: Because it contains no bleach or ammonia, it won’t damage your siding, roof shingles, or deck finish. It’s also much safer for surrounding landscaping than harsh caustic cleaners. • Long-Lasting: Once a surface is clean, the residual effect of the product helps prevent regrowth for up to 12–18 months. • Reach: The "Xtreme Reach" hose-end version can spray up to 30 feet, allowing you to treat second-story siding or roofs without ever touching a ladder. The Cons • The Waiting Game: This is not for people prepping for a backyard party tomorrow. Green algae usually disappears in 1–2 weeks, but black mold or thick moss can take 3–6 months to fully clear. • Weather Dependent: You need a dry day for application (at least 4–5 hours of dry time), but then you need subsequent rain to actually wash the stains away. If you live in a drought-prone area, you might have to manually hose it down once a week to see progress. • Not for "Dirt": It only works on organic growth. It will not remove mud, clay, or grease stains. Wet & Forget is an elite product if you are a proactive maintenance-taker. If you apply it every spring as a preventative measure, your house will stay pristine year-round without you ever breaking a sweat. Pro Tip: If your concrete is currently "black" with years of buildup, hit it with a pressure washer once to get a clean slate, then apply Wet & Forget every year after to ensure you never have to pressure wash again. ### ⭐⭐⭐⭐⭐ Mold and Mildew Be Gone!! *by O***R on 26 April 2026* I have several stone patios, stairs, and walkways. We have a lot of trees around our property and the stonework gets its share of mold and mildew. I used to buy a very expensive mildew remover that worked with a pressure washer. For the first few years, that worked fine but took a long time to do. Over time, some mold and mildew got into the stonework deep enough that pressure washer just wasn't enough. Someone told me about Wet & Forget so I gave it a try last fall. Boy did it work great!! Now it doesn't work immediately. It does take a few to several weeks to work. But my stonework looks like it was brand new. It is very easy to use. You mix the proper ratio of it with water in a hand sprayer and simply spray it on. It goes much faster than a pressure washer. I think the label says reapply after a few months but I think I'll only need to do two applications per year. This is a great product in my opinion and I recommend it. ## Frequently Bought Together - Wet & Forget Moss, Mold, Mildew, & Algae Stain Remover Multi-Surface Outdoor Cleaner Concentrate, Original, 128 Fluid Ounces - Wet & Forget Outdoor Moss, Mold, Mildew, & Algae Stain Remover Multi-Surface Cleaner, Xtreme Reach Hose End with New & Improved Nozzle, 48 Fluid Ounces - Wet & Forget Shower Cleaner Spray Multi-Surface Weekly Application Requires No Scrubbing, Bleach-Free Formula, Ready to Use, Fresh Scent, 3 Months of Cleaning, 64 Fluid Ounces, 1 Pack --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.uk/products/712917254-moss-mold-mildew-and-algae-stain-remover-multi-surface-outdoor](https://www.desertcart.co.uk/products/712917254-moss-mold-mildew-and-algae-stain-remover-multi-surface-outdoor) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-07-05*