--- product_id: 48157194 title: "Mould, Lichen & Algae Remover, Outdoor Patio Cleaner, Black Spot Remover, Bleach Free, 5L" brand: "wet & forget" price: "€ 69.46" currency: EUR in_stock: true reviews_count: 13 category: "Wet & Forget" url: https://www.desertcart.hr/products/48157194-mould-lichen-and-algae-remover-outdoor-patio-cleaner-black-spot store_origin: HR region: Croatia --- # Bleach-free, nearly pH-neutral, safe on multiple surfaces Highly concentrated 5L covers up to 300m² No scrubbing or rinsing needed, just spray & walk away Mould, Lichen & Algae Remover, Outdoor Patio Cleaner, Black Spot Remover, Bleach Free, 5L **Brand:** wet & forget **Price:** € 69.46 **Availability:** ✅ In Stock ## Summary > 🌟 Spray, Forget, Impress — The Ultimate Outdoor Clean-Up Hack ## Quick Answers - **What is this?** Mould, Lichen & Algae Remover, Outdoor Patio Cleaner, Black Spot Remover, Bleach Free, 5L by wet & forget - **How much does it cost?** € 69.46 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/48157194-mould-lichen-and-algae-remover-outdoor-patio-cleaner-black-spot) ## 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 - • **Surface-Safe Formula:** Gentle, bleach-free, and pH-neutral for patios, roofs, solar panels & more - • **Eco-Conscious Cleaning:** Biodegradable and free from harsh chemicals, safe for your outdoor sanctuary - • **Massive Coverage Power:** One 5L bottle dilutes to 30L solution, treating up to 300m² of grime - • **Long-Lasting Protection:** Prevents mould, algae & lichen from returning, keeping surfaces pristine - • **Effortless Outdoor Renewal:** Spray once, forget forever—no scrubbing or jet washing required ## Overview Wet & Forget Mould, Lichen & Algae Remover is a powerful, bleach-free outdoor cleaner that requires no scrubbing or rinsing. Its highly concentrated 5L formula dilutes to cover up to 300m², effectively removing and preventing mould, algae, and lichen on a wide range of surfaces including patios, roofs, and solar panels. Designed for ease and safety, it’s biodegradable and gentle on surfaces while delivering long-lasting results with minimal effort. ## Description Product Description Wet & Forget Mould, Lichen and Algae remover is the outdoor cleaning solution you’ve been looking for. Effectively remove contaminants with no water blasting or scrubbing required – simply apply to the surface and forget about it. Let Wet & Forget do the hard work for you. Our formula has an unlimited shelf life and is completely free from aggressive chemicals such as bleach and ammonia that can damage surfaces. No special equipment is needed for application. This simple approach means it is suitable for anyone to use. It can be used on ANY outdoor surface such as, roofs, bricks, natural stone, pavers, headstones, patios, driveways, paintwork glass houses, solar panels, tarmac, artificial grass and more. Wet & Forget also has a residual effect, the ingredients in the remover work to prevent premature recontamination helping to stop reoccurring mould growth. Ingredients Benzalkonium Chloride Directions Directions for Use • Mix one part Wet & Forget to five parts waters. Strength can be increased if contamination is more severe. • Saturate the DRY surface with mixture. We recommend application to be done first thing in the morning or on an evening and where rain is not forecasted in the 4-5 hours after application. • When rainfall begins, it works to wash away the contamination. • In some cases, re-application can be done 1-2 months after for persisting mould. Safety Warning Keep out of reach from children. Wear protective gloves and eye protection. If swallowed, call a poison centre, or seek medical advice. If the product encounters your skin or eyes, rinse thoroughly with water for several minutes. Dispose of contents/container is accordance with local legislation. This material and its container must be disposed of in a safe way. Use biocides safely. Always read the label and product information before use. To avoid risks to man and the environment, comply with the instructions for use. Safety Warning -Causes serious eye irritation. -Causes skin irritation. -Use biocides safely. Always read the label and product information before use. -Active Ingredient: Alkyl (C12-16) dimethylbenzyl ammonium chloride. -Very toxic to aquatic life. Box Contains One 5 Lt Bottle Review: Mould Mould Go away no need to come back on another day - I’ll be honest, I went into this a bit sceptical. Outdoor cleaners usually promise a lot and then quietly disappoint, so I deliberately waited quite a while before writing this to see what actually happened over time. The difference is obvious. The before and after is night and day. Black mould, algae and general grime that had been clinging on for ages has genuinely cleared away without any scrubbing. It looks cleaner, brighter and just healthier overall, especially on areas that never fully dried out before. In terms of use, the first application I did with a jet wash because it felt quicker and easier for covering a larger area. That worked perfectly and made light work of the initial clean. Since then I have reapplied it every few months using a standard pump sprayer and that has been just as straightforward. Ease of use is a big plus here, fill it, apply it, walk away. No effort, no fuss. The functionality is exactly what it claims. You apply it and let it do its thing over time. There is no instant blast like bleach, but that is kind of the point. It keeps working long after you have finished applying it. Durability is excellent because the results last, not just a quick cosmetic clean that comes back after the next bit of rain. Quality feels spot on and the capacity goes a long way, especially when diluted properly. Power wise it is clearly strong enough to deal with stubborn growth without damaging surfaces. Value for money is very good considering how effective it is and how little effort is involved. One bottle has covered far more area than I expected. I honestly cannot fault it. No weird residue, no strong lingering smell, no damage to surrounding areas. It just quietly works. That whole too good to be true saying does not really apply here. This one actually delivers. Review: Goes a fair amount but pricey - Small amount for the price but dilutes down so not bad value. Does not smell chemical and the bottle was well packaged on arrival, easy to apply with a spray bottle and no leaks. Seemingly takes a while for removal but our green algae on the wooden fence slats went almost instantly. It looks really good now. Was worried about the effect on nearby grass but this seems less damaging than other chemicals we have used in the past. The slats now look much better. Really effective and hopefully long lasting. This should avoid us having paint the fence this year. I did most of our fence and also a decent amount of decking boards, spindles and siding with the smaller bottle. A big bottle would easily do a whole garden. ## Features - Causes serious eye damage. - Causes skin irritation. - Use biocides safely. Always read the label and product information before use. - Very toxic to aquatic life with long lasting effects. - No Scrubbing Required: Simply mix 1 part Wet & Forget with 5 parts water, apply to the desired surface, and let it work its magic. No scrubbing, rinsing or jet washing required, just spray and walk away - Highly Concentrated Formula: One bottle produces up to 30 litres of solution, covering a large area of 100-300m². Apply in cloudy, dry conditions for best results, ensuring at least 4-5 hours before any rainfall - Versatile Application: Perfect for various surfaces, including patios, roofs, bricks, paving, artificial grass, tarmac, decking and more. Whether it's your driveway, headstones, or solar panels, Wet & Forget has you covered - Softer Solution: Wet & Forget’s gentle, nearly pH-neutral formula is bleach-free making it safe to use on so many different outdoor surfaces - Confidence in Every Spray: While our formula is gentle, we recommend wearing protective gloves and eye protection during use. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B005IW4GWI | | Best Sellers Rank | 140 in Grocery ( See Top 100 in Grocery ) 2 in Mould Removers | | Brand | Wet & Forget | | Brand Name | Wet & Forget | | Contains Liquid Contents? | Yes | | Customer Reviews | 4.4 out of 5 stars 28,255 Reviews | | Item Form | Liquid | | Item Type Name | Mould Lichen & Algae Remover | | Item Volume | 5 Litres | | Item Weight | 5229 Grams | | Item form | Liquid | | Item volume | 5 Litres | | Manufacturer | Wet & Forget Ltd | | Material Features | Bleach Free | | Material Type Free | Bleach Free | | Material feature | Bleach Free | | Model Number | WF5 | | Number of Items | 1 | | Part Number | WF5 | | Product Warranty | Use biocides safely. Always read the label and product information before use, Active Ingredient: Benzalkonium Chloride | | Scent | Unscented | | Size | 5 l (Pack of 1) | | Special Features | Biodegradable | | Specific Uses For Product | Outdoor Surfaces | | Specific uses for product | Outdoor Surfaces | | Surface Recommendation | Floor | | Unit Count | 5000.0 millilitre | ## Product Details - **Brand:** Wet & Forget - **Item form:** Liquid - **Item volume:** 5 Litres - **Material Type Free:** Bleach Free - **Material feature:** Bleach Free - **Scent:** Unscented - **Special feature:** Biodegradable - **Specific uses for product:** Outdoor Surfaces - **Surface recommendation:** Floor - **Unit count:** 5000.0 millilitre ## Images ![Mould, Lichen & Algae Remover, Outdoor Patio Cleaner, Black Spot Remover, Bleach Free, 5L - Image 1](https://m.media-amazon.com/images/I/71zpUW2DcaL.jpg) ![Mould, Lichen & Algae Remover, Outdoor Patio Cleaner, Black Spot Remover, Bleach Free, 5L - Image 2](https://m.media-amazon.com/images/I/710NUt5V-LL.jpg) ![Mould, Lichen & Algae Remover, Outdoor Patio Cleaner, Black Spot Remover, Bleach Free, 5L - Image 3](https://m.media-amazon.com/images/I/713jzw2OdKL.jpg) ![Mould, Lichen & Algae Remover, Outdoor Patio Cleaner, Black Spot Remover, Bleach Free, 5L - Image 4](https://m.media-amazon.com/images/I/71-D0nalSYL.jpg) ![Mould, Lichen & Algae Remover, Outdoor Patio Cleaner, Black Spot Remover, Bleach Free, 5L - Image 5](https://m.media-amazon.com/images/I/61mBnKtaycL.jpg) ## Questions & Answers **Q: Active ingredient ?** A: The active ingredient in Wet & Forget is Alkyl Dimethyl Benzyl Ammonium Chloride. I think this is the same ingredient that is in many kitchen surface cleaners. This chemical has other names too I believe like benylkonium chloride. Benzalkonium chloride, also known as BZK, BKC, BAC, alkyldimethylbenzylammonium chloride and ADBAC , is a type of cationic surfactant which has antiseptic and anti fungal properties. **Q: Once moss is killed from between block pavers do you have to sweep up dead debris?** A: Yes, I would definitely clean any debris away, if you are removing green alge, it just disapearers after a few days **Q: Is it safe to use on patio that cat walks across** A: Yep my cat and dogs walk on the patio spray on a dry warm day it dries quickly and starts cleaning immediately **Q: We have a bad infestation of lichen on a conservatory roof. Has anyone had good results at removing same?** A: we have had lots of moss on our patio and on the shed roof and over 6 months it has cleaned the lot but you have to do it when it is dry and then the sun and the rain clears it, it is great no scrubbing just spray it on and leave it ## Customer Reviews ### ⭐⭐⭐⭐⭐ Mould Mould Go away no need to come back on another day *by A***B on 28 February 2026* I’ll be honest, I went into this a bit sceptical. Outdoor cleaners usually promise a lot and then quietly disappoint, so I deliberately waited quite a while before writing this to see what actually happened over time. The difference is obvious. The before and after is night and day. Black mould, algae and general grime that had been clinging on for ages has genuinely cleared away without any scrubbing. It looks cleaner, brighter and just healthier overall, especially on areas that never fully dried out before. In terms of use, the first application I did with a jet wash because it felt quicker and easier for covering a larger area. That worked perfectly and made light work of the initial clean. Since then I have reapplied it every few months using a standard pump sprayer and that has been just as straightforward. Ease of use is a big plus here, fill it, apply it, walk away. No effort, no fuss. The functionality is exactly what it claims. You apply it and let it do its thing over time. There is no instant blast like bleach, but that is kind of the point. It keeps working long after you have finished applying it. Durability is excellent because the results last, not just a quick cosmetic clean that comes back after the next bit of rain. Quality feels spot on and the capacity goes a long way, especially when diluted properly. Power wise it is clearly strong enough to deal with stubborn growth without damaging surfaces. Value for money is very good considering how effective it is and how little effort is involved. One bottle has covered far more area than I expected. I honestly cannot fault it. No weird residue, no strong lingering smell, no damage to surrounding areas. It just quietly works. That whole too good to be true saying does not really apply here. This one actually delivers. ### ⭐⭐⭐⭐ Goes a fair amount but pricey *by W***W on 16 February 2026* Small amount for the price but dilutes down so not bad value. Does not smell chemical and the bottle was well packaged on arrival, easy to apply with a spray bottle and no leaks. Seemingly takes a while for removal but our green algae on the wooden fence slats went almost instantly. It looks really good now. Was worried about the effect on nearby grass but this seems less damaging than other chemicals we have used in the past. The slats now look much better. Really effective and hopefully long lasting. This should avoid us having paint the fence this year. I did most of our fence and also a decent amount of decking boards, spindles and siding with the smaller bottle. A big bottle would easily do a whole garden. ### ⭐⭐⭐⭐⭐ Amazing & so easy to use. *by L***O on 1 May 2026* So easy to use & with such minimal effort the algae on my fence has gone! Over the years I have used so many different products all promising the same thing, & none delivering so was sceptical about this even though the reviews were generally good. It was good on my patio, but it was amazing on my fence! Used a spray pump canister & just one layer of spray on the fence panels has removed all the algae. Amazed! Highly recommend! ## Frequently Bought Together - Wet & Forget Mould, Lichen & Algae Remover, Outdoor Cleaning Solution, Black Mould Remover, Bleach Free, 5 Litre - Spear & Jackson 5LPAPS 5 Litre Pump Action Pressure Sprayer --- ## 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.hr/products/48157194-mould-lichen-and-algae-remover-outdoor-patio-cleaner-black-spot](https://www.desertcart.hr/products/48157194-mould-lichen-and-algae-remover-outdoor-patio-cleaner-black-spot) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-05-24*