--- product_id: 90561603 title: "SmartSeal Green Clear Pro - 25L - Concentrated Biocide & Green Growth Remover. Spray and Leave Roof Tile Cleaner, Patio Cleaner & Algae Remover. For Use on Concrete, Wood, Decking & Stone" brand: "smartseal" price: "€ 377.52" currency: EUR in_stock: true reviews_count: 3 category: "Smart Seal" url: https://www.desertcart.hr/products/90561603-smartseal-green-clear-pro-25l-concentrated-biocide-and-green-growth store_origin: HR region: Croatia --- # kills & inhibits algae & lichen spray & leave, no pressure wash needed 25L concentrated biocide SmartSeal Green Clear Pro - 25L - Concentrated Biocide & Green Growth Remover. Spray and Leave Roof Tile Cleaner, Patio Cleaner & Algae Remover. For Use on Concrete, Wood, Decking & Stone **Brand:** smartseal **Price:** € 377.52 **Availability:** ✅ In Stock ## Summary > 🌿 Spray. Walk Away. Own the Clean Outdoors. ## Quick Answers - **What is this?** SmartSeal Green Clear Pro - 25L - Concentrated Biocide & Green Growth Remover. Spray and Leave Roof Tile Cleaner, Patio Cleaner & Algae Remover. For Use on Concrete, Wood, Decking & Stone by smartseal - **How much does it cost?** € 377.52 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/90561603-smartseal-green-clear-pro-25l-concentrated-biocide-and-green-growth) ## Best For - smartseal enthusiasts ## Why This Product - Trusted smartseal brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Trade-Grade Power in Every Drop:** Professional HSE-approved biocide that eradicates black lichen, mould, algae & mildew on multiple outdoor surfaces. - • **Versatile Multi-Surface Solution:** Effective on concrete, wood, decking, stone, UPVC, patios, roofs, and garden furniture—one product to rule them all. - • **Effortless Spray & Forget Formula:** No scrubbing or pressure washing required; just spray and watch it work over weeks, saving you time and hassle. - • **Massive Coverage for Big Projects:** 25L treats up to 1000m², perfect for professional landscapers or ambitious homeowners aiming for flawless exteriors. - • **Long-Lasting Green Growth Inhibition:** Not only removes existing algae but prevents regrowth, keeping your outdoor spaces pristine season after season. ## Overview SmartSeal Green Clear Pro is a concentrated, professional-grade biocide designed to remove and inhibit green algae, lichen, mould, and mildew on a wide range of outdoor surfaces including roofs, patios, decking, and stone. Its spray-and-leave formula requires no rinsing or pressure washing, offering up to 1000m² coverage per 25L container. Approved by HSE and safe once dry, it’s the ultimate all-in-one solution for maintaining pristine, algae-free exteriors with minimal effort. ## Description Product Description Green Clear Pro is a concentrated mould lichen and algae remover and outdoor cleaner for use on roofs, driveways, patios and walls. The black spot remover will help to ensure black lichen, mould and algae do not grow easily on external hard surfaces. To clean a patio, use the paving slab cleaner, make the surface wet and forget you ever applied it; it really is that easy. Green Clear Pro is not classified as a path moss killer or roof moss remover, but will certainly help to keep moss away from paths, roofs and driveways once you have managed to get the moss off the surface. Using a spray and forget patio cleaner may not produce instant patio cleaning results. However, once the stone cleaner or slate cleaner has made the surface clean, the patio should stay free from green growth for a long period of time. The multi-use wet and walk away outdoor cleaner is often used as a conservatory roof cleaner, roof tile cleaner and upvc cleaner to prevent green algae and mould growing on window sills and roofs. Furthermore, Green Clear Pro is a concentrated fungicidal wash and biocide that can be used at various dilution levels to eliminate the growth of mould, mildew, lichen and green algae on large outdoor areas such as tennis courts, school playgrounds and car parks. It is frequently used as an artificial grass cleaner to eliminate green growth on sports fields as well as residential gardens laid with artificial grass. The trade strength spray and leave formula is also used as a fence algae remover, decking algae remover and patio algae remover by cleaning professionals and homeowners to keep these external hard surfaces looking good at all times. Green Clear Pro is very versatile and frequently classified as an all-in-one lichen remover and green growth remover for a multitude of outdoor surfaces. If you are searching for an effective spray cleaner for paths and drives that can inhibit the growth of mould and green algae, then Green Clear Pro is well worth considering. Can it be effective for red & black algae on cream-rendered exterior walls, without damaging the render finish? Green Clear PRO can be used to kill and remove red and black algae on cream coloured render. A soft brush can be used to remove organic growth on badly contaminated areas. Can it be effective for red & black algae on cream-rendered exterior walls, without damaging the render finish? Green Clear PRO can be used to kill and remove red and black algae on cream coloured render. A soft brush can be used to remove organic growth on badly contaminated areas. How would your product be applied to a house roof? Green Clear PRO is usually applied by a sprayer. In the case of house roofs, depending on access, it can be sprayed from a ladder or scaffolding. If the roof is not that high, then it can be applied using a sprayer and an extendable lance. How would your product be applied to a house roof? Green Clear PRO is usually applied by a sprayer. In the case of house roofs, depending on access, it can be sprayed from a ladder or scaffolding. If the roof is not that high, then it can be applied using a sprayer and an extendable lance. Does it also clear weeds, please? Green Clear may kill some types of weeds, but is not regarded as a weed killer. It would be best to purchase a specific weed killer for that purpose. Does it also clear weeds, please? Green Clear may kill some types of weeds, but is not regarded as a weed killer. It would be best to purchase a specific weed killer for that purpose. Is this product animal/bird friendly? We would not classify the Green Clear Pro as animal or bird-friendly immediately after application. Once dry, it is totally safe for birds and other animals to walk on. Is this product animal/bird friendly? We would not classify the Green Clear Pro as animal or bird-friendly immediately after application. Once dry, it is totally safe for birds and other animals to walk on. Is the product acidic? No, Green Clear is not acidic. Is the product acidic? No, Green Clear is not acidic. Review: This is brilliant and a fraction of the price of the bigger brands and works at lower temps - This works, you can use it above 0 degrees C, Moss clear you need to use above 8 deg C so you can get this on your green stuff earlier on the year and it will work. I sprayed this on our render, decking and patio, within 24 hours the algae had started to clear, the rest of it was gone within a week and it seemed to continue workign beyond that as these things continued to clear. Review: Great item - Excellent customer service quickly delivered. Great product. ## Features - Professional Grade Biocide: Green Clear Pro is an HSE-approved biocide and considered the ultimate green growth remover by the trade and general public for killing black lichen, mould, algae & mildew on driveways, patios, roofs & walls. It is also an effective green algae remover for patios, a garden furniture cleaner & patio algae remover for sandstone, limestone and porcelain - Multi-Use Formula: Green Clear Pro is a versatile, high-strength spray and leave green growth remover that can be used as a composite decking cleaner, upvc cleaner, wood cleaner, render cleaner or natural stone cleaner. It also works well as a wet and walk-away roof tile cleaner, patio furniture cleaner, artificial grass cleaner and porcelain patio cleaner - Kills & Inhibits Regrowth: Whether you are looking for a tarmac cleaner, wall cleaner, render cleaner, patio slab cleaner or just a decking algae remover, this powerful wood mould remover and green algae remover will kill unwanted green growth on patios, driveways, walls and roofs. Simply spray and walk away to keep your outdoor surfaces looking good at all times - No Pressure Washing Required: The trade-strength green algae remover is a spray and leave outdoor cleaner that kills mould lichen and green growth on most hard surfaces, such as roof tiles, render, masonry, brickwork, tarmac, concrete, cement and natural stone. Simply spray and walk away, and the no rinse patio cleaner will do its work over a period of weeks - Coverage & Application: 5L will treat up to 240m2. The concentrated spray cleaner is an algae remover, lichen remover and wet and leave patio cleaner that should be applied by sprayer or watering can. Green Clear does not contain bleaches or acids, and for best results, dilute with water at a ratio of 1:5 for heavy contamination, 1:10 for regular use & 1:20 to prevent regrowth ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B01BTXIHIS | | Active Ingredients | green algae | | Active ingredients | green algae | | Best Sellers Rank | 18,743 in Garden ( See Top 100 in Garden ) 97 in Moss Control | | Brand | SmartSeal | | Brand Name | SmartSeal | | Country of Origin | United Kingdom | | Coverage | 1000 square meters | | Customer Reviews | 4.5 out of 5 stars 10 Reviews | | Included Components | Product only | | Item Form | Liquid | | Item Weight | 25 Kilograms | | Item form | Liquid | | Item weight | 25 Kilograms | | Liquid Volume | 25 Litres | | Liquid volume | 25 Litres | | Part Number | sm-mcp-25 | | Unit Count | 25000.0 millilitre | | Unit count | 25000.0 millilitre | ## Product Details - **Active ingredients:** green algae - **Brand:** SmartSeal - **Item form:** Liquid - **Item weight:** 25 Kilograms - **Liquid volume:** 25 Litres ## Images ![SmartSeal Green Clear Pro - 25L - Concentrated Biocide & Green Growth Remover. Spray and Leave Roof Tile Cleaner, Patio Cleaner & Algae Remover. For Use on Concrete, Wood, Decking & Stone - Image 1](https://m.media-amazon.com/images/I/81mpUvVVyHL.jpg) ![SmartSeal Green Clear Pro - 25L - Concentrated Biocide & Green Growth Remover. Spray and Leave Roof Tile Cleaner, Patio Cleaner & Algae Remover. For Use on Concrete, Wood, Decking & Stone - Image 2](https://m.media-amazon.com/images/I/61jzcWc2w6L.jpg) ![SmartSeal Green Clear Pro - 25L - Concentrated Biocide & Green Growth Remover. Spray and Leave Roof Tile Cleaner, Patio Cleaner & Algae Remover. For Use on Concrete, Wood, Decking & Stone - Image 3](https://m.media-amazon.com/images/I/71f9n9+ISNL.jpg) ![SmartSeal Green Clear Pro - 25L - Concentrated Biocide & Green Growth Remover. Spray and Leave Roof Tile Cleaner, Patio Cleaner & Algae Remover. For Use on Concrete, Wood, Decking & Stone - Image 4](https://m.media-amazon.com/images/I/71Br7ynRWyL.jpg) ![SmartSeal Green Clear Pro - 25L - Concentrated Biocide & Green Growth Remover. Spray and Leave Roof Tile Cleaner, Patio Cleaner & Algae Remover. For Use on Concrete, Wood, Decking & Stone - Image 5](https://m.media-amazon.com/images/I/71jtq-BTiEL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: Can it be effective for red & black algae on cream-rendered exterior walls, without damaging the render finish?** A: Green Clear PRO can be used to kill and remove red and black algae on cream coloured render. A soft brush can be used to remove organic growth on badly contaminated areas. **Q: How would your product be applied to a house roof?** A: Green Clear PRO is usually applied by a sprayer. In the case of house roofs, depending on access, it can be sprayed from a ladder or scaffolding. If the roof is not that high, then it can be applied using a sprayer and an extendable lance. **Q: Does it also clear weeds, please?** A: Green Clear may kill some types of weeds, but is not regarded as a weed killer. It would be best to purchase a specific weed killer for that purpose. **Q: Is this product animal/bird friendly?** A: We would not classify the Green Clear Pro as animal or bird-friendly immediately after application. Once dry, it is totally safe for birds and other animals to walk on. **Q: Is the product acidic?** A: No, Green Clear is not acidic. ## Customer Reviews ### ⭐⭐⭐⭐⭐ This is brilliant and a fraction of the price of the bigger brands and works at lower temps *by M***N on 5 May 2026* This works, you can use it above 0 degrees C, Moss clear you need to use above 8 deg C so you can get this on your green stuff earlier on the year and it will work. I sprayed this on our render, decking and patio, within 24 hours the algae had started to clear, the rest of it was gone within a week and it seemed to continue workign beyond that as these things continued to clear. ### ⭐⭐⭐⭐⭐ Great item *by R***T on 21 August 2025* Excellent customer service quickly delivered. Great product. ### ⭐⭐⭐⭐⭐ Did not bring promised results *by S***N on 21 April 2021* It didn’t work in my garden. Moss is as healthy as before ## Frequently Bought Together - SmartSeal Green Clear Pro - Powerful Green Algae Remover - Easy To Apply Best Mould, Lichen & Black Mould Remover - Perfect Roof Cleaner & Driveway Cleaner - (25 Litres) - 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/90561603-smartseal-green-clear-pro-25l-concentrated-biocide-and-green-growth](https://www.desertcart.hr/products/90561603-smartseal-green-clear-pro-25l-concentrated-biocide-and-green-growth) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-07-11*