The Spear & Jackson Ready to Use Spray and Leave is the perfect solution for effectively cleaning various surfaces such as paths, patios, driveways, steps, headstones, garden ornaments, and more. Its powerful formula is specifically formulated to eliminate mould, algae, and everyday dirt from affected areas, while also targeting and destroying the spores produced by algae. By doing so, it helps to prolong the time it takes for algae to reappear. This innovative product is designed to withstand outdoor elements like wind and rain, gradually washing away contamination over several months. In fact, it can continue working for up to a year, ensuring long-lasting cleanliness and protection.