--- product_id: 55380196 title: "Algae & Mould Remover | Concentrated Patio & Path Cleaner | Stone-Safe Biocide for Paving Slabs & Outdoor Areas | 1L" brand: "hg" price: "216.57 DT" currency: TND in_stock: true reviews_count: 8 category: "Hg" url: https://www.desertcart.tn/products/55380196-algae-and-mould-remover-concentrated-patio-and-path-cleaner-stone store_origin: TN region: Tunisia --- # Safe for plants when diluted 1L concentrated formula Visible results in 36 hours Algae & Mould Remover | Concentrated Patio & Path Cleaner | Stone-Safe Biocide for Paving Slabs & Outdoor Areas | 1L **Brand:** hg **Price:** 216.57 DT **Availability:** ✅ In Stock ## Summary > ✨ Transform your outdoor space—fast, safe & spotless! 🌿 ## Quick Answers - **What is this?** Algae & Mould Remover | Concentrated Patio & Path Cleaner | Stone-Safe Biocide for Paving Slabs & Outdoor Areas | 1L by hg - **How much does it cost?** 216.57 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/55380196-algae-and-mould-remover-concentrated-patio-and-path-cleaner-stone) ## Best For - hg enthusiasts ## Why This Product - Trusted hg brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Powerful Biocide Action:** Eradicates algae, mould & lichen fast for pristine outdoor spaces - • **Fast-Acting & Long-Lasting:** See visible results in just 36 hours and enjoy slower regrowth - • **Garden-Friendly When Diluted:** Protects your greenery while keeping outdoor surfaces spotless - • **Economical Large Area Coverage:** Cleans up to 200m² with a single bottle—ideal for big patios & driveways - • **Broad-Spectrum Surface Compatibility:** Perfect for stone, concrete, tiles, roofs, fences & more ## Overview HG Algae & Mould Remover is a concentrated 1L biocide designed to quickly eliminate algae, mould, lichen, and fungus from a wide range of outdoor surfaces including stone, concrete, tiles, and wood. Delivering visible results within 36 hours, it covers up to 200m² per bottle and, when diluted properly, is safe for surrounding plants and grass. This fast-acting cleaner not only restores but also helps prevent regrowth, making it the go-to solution for maintaining pristine patios, paths, and exterior areas. ## Description Product Description HG Algae and Mould Remover is an effective algae and mildew remover for a variety of outside surfaces. Algae, fungi and mould can build up on patios, walls, roof tiles and concrete surfaces, such as patios, headstones and fencing posts. This effective HG stone and algae cleaner is the ideal patio cleaner, leaving stone pathways, driveways and even plant pots looking their best. This biocide penetrates deep into the surface of the concrete, covering up to 200m2, and helps protect your brickwork against algae building up again. Once diluted, the biocide cleaner won’t kill your plants, so you can keep your garden looking fantastic all year round. Includes: 1 x HG Algae and Mould Remover (1L) How to use: 1. For best results, scrub as much moss as you can from the patio or concrete first 2. Dilute in a watering can or plant sprayer with water, in a ratio of 1:20 3. Apply in dry weather, when there is no rain forecast for the next two days Keep multi surface cleaner out of reach of children. Use biocides safely. Always read the label. Discover HG professional's wide range of specialist household cleaning products and all-purpose cleaner sprays for your home, office and outside space. Directions Dilute 1:20 with water, apply with watering can, broom, scrubbing-brush or plant spray. Apply during dry weather. Do not rinse off. Safety Warning Use biocides safely. Always read the label and product information before use. Box Contains 1 x HG Moss, Algae and Mould Remover 1L Review: Great result with a brush. - Very effective on patio tiles but better to use with a brush to scrub the tiles. Review: Better than expected - Reading the other reviews you wouldn't think this would work well however i used it on my stone flags with good results. Definitely cleaner and has killed the algae . First i treated with ratio as described so 1:20, then i think i used 1:10 for flags with excessive algae. I know i'll have to retreat in 6 months or so but will do nicely for now. also used on a fence but probs needs another spray as it hasnt all cleared.. ## Features - Causes serious eye damage. - Causes skin irritation. - Harmful to aquatic life with long lasting effects. - Use biocides safely. Always read the label and product information before use. - Very toxic to aquatic life. - Powerful Algae & Mould Remover Biocide: HG Algae & Mould Remover is a high-performance outdoor biocide that kills and removes algae, mould, lichen and fungus from a wide range of exterior surfaces for long-lasting cleanliness - Multi-Surface Outdoor Cleaner: Ideal patio cleaner and path cleaner for use on stone, concrete, masonry, tiles, roofs, walls, fences, boats, caravans and other outdoor hard surfaces affected by organic growth - Fast Acting Results in 36 Hours: Delivers visible cleaning results quickly, removing green algae and black mould growth within approximately 36 hours for effective and efficient outdoor surface restoration - Treats Large Areas up to 200m²: Highly economical concentrated formula covers up to 200m² when diluted, making it suitable for large patios, driveways and exterior spaces while remaining easy to apply - Prevents Regrowth & Plant Safe When Diluted: Helps slow down regrowth of algae and mould for longer-lasting protection. When correctly diluted, it is safe for surrounding grass and plants, making it ideal for garden use ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B000IU3VTE | | Active Ingredients | AQUA, DIDECYLDIMONIUM CHLORIDE, ISOPROPYL ALCOHOL | | Active ingredients | AQUA, DIDECYLDIMONIUM CHLORIDE, ISOPROPYL ALCOHOL | | Best Sellers Rank | 16,267 in Garden ( See Top 100 in Garden ) 72 in Moss Control 7,923 in Home Care & Cleaning | | Brand | HG | | Brand Name | HG | | Coverage | Broad-spectrum coverage for moss, algae, and mould | | Customer Reviews | 4.3 out of 5 stars 409 Reviews | | Global Trade Identification Number | 08711577002916 | | Included Components | HG Algae and Mould Remove | | Item Form | Liquid | | Item Weight | 848 g | | Item form | Liquid | | Item weight | 848 g | | Liquid Volume | 1000 Millilitres | | Liquid volume | 1000 Millilitres | | Manufacturer | HG Hagesan (UK) Ltd | | Model Number | 181100106 | | Number of Packs | 1 | | Part Number | 181100106 | | Unit Count | 1000.0 millilitre | ## Product Details - **Active ingredients:** green algae - **Brand:** HG - **Item form:** Liquid - **Item weight:** 1.87 Pounds - **Liquid volume:** 1000 Millilitres ## Images ![Algae & Mould Remover | Concentrated Patio & Path Cleaner | Stone-Safe Biocide for Paving Slabs & Outdoor Areas | 1L - Image 1](https://m.media-amazon.com/images/I/61t9zkblCCL.jpg) ## Questions & Answers **Q: Can you use on porcelain slabs?** A: If your porcelain slabs are acid sensitive then this product is not recommended. Instead use HG Extreme Power Cleaner to remove the algae and mould. **Q: Can it be used near artificial grass?** A: Dear Madam- our product contains a bleaching element that could damage the artificial grass. **Q: Could this be used on a wooden staircase without damaging the wood?** A: Sorry, I can't be of any help to you. Ive used it only on a wooden fence outside where it worked very well and did no damage to that. **Q: Is it safe near a pond** A: That depends what you have in the pond. This is an algae and mould remover. So it will kill algae. I would not expect that it will do pond life any good at all as it will be similar in action to bleach. From memory, the label indicates that it is a hazardous material. If you want to use it to remove algae from around the border of a pond then you should try to prevent the HG liquid from getting into the pond. I would cover the pond with polythene and tape the edges to stop the liquid and any vapour from getting to the pond surface, particularly if you have fish in the pond. Why not scrub the algae away with a stiff brush and plain cold water? ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great result with a brush. *by A***R on 14 July 2026* Very effective on patio tiles but better to use with a brush to scrub the tiles. ### ⭐⭐⭐⭐⭐ Better than expected *by A***N on 23 March 2024* Reading the other reviews you wouldn't think this would work well however i used it on my stone flags with good results. Definitely cleaner and has killed the algae . First i treated with ratio as described so 1:20, then i think i used 1:10 for flags with excessive algae. I know i'll have to retreat in 6 months or so but will do nicely for now. also used on a fence but probs needs another spray as it hasnt all cleared.. ### ⭐⭐⭐⭐ Does a good job of removing algae, but not a dedicated "cleaner" *by J***M on 6 January 2025* Decent product, our patio gets so slippery with algae and surface dirt it's a real hazard. This product makes the surface safe again. I wouldn't say it's the best cleaner as the patio still looks a bit stained, but I will find something else for that. Priority was to get rid of the slipperiness. ## Frequently Bought Together - HG Algae & Mould Remover, Outdoor Path & Patio Cleaner, Green Algae Remover & Headstone Cleaner, Gentle on Stone Surfaces, Biocide Paving Slab Cleaner - 1 Litre - HG Mould Spray, Effective Mould Spray & Mildew Cleaner, Removes Mouldy Stains From Walls, Tiles, Silicone Seals & More - 500ml , Pack of 1 - HG Patio-Tile Cleaner, Concentrated Floor Tiling Cleanser for Terrace Stones, Cleans Dirty, Dull Gravel & Concrete Outdoor Floor Paving Tiles, Fast Acting – 1 Litre (183100106) --- ## 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.tn/products/55380196-algae-and-mould-remover-concentrated-patio-and-path-cleaner-stone](https://www.desertcart.tn/products/55380196-algae-and-mould-remover-concentrated-patio-and-path-cleaner-stone) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-08-15*