Restore your home's charm with this SmartSeal Xtreme Roof Cleaner. This roof cleaner is a high-quality cleaning product that can give a new look to any old and dull surface. It offers a simple and effective method of cleaning without the need for intense pressure washing. It contains four powerful, active ingredients that can easily remove black and white spots, algae, lichens, and moss from any tiled roof. Diluting 5L of the product with an equal amount of water can cover up to 40m2. This roof tile cleaner is proven, tested, and trusted. It can be applied using a sprayer or watering can. Instructions for use: 1. Remove any loose debris or heavy build-up of moss. 2. Wet the surface with water. 3. Dilute the product at a ratio of 1:1. 4. Apply generously to the roof using a water can or pump sprayer. 5. Leave on the surface for approx 60 minutes. 6. Keep the surface damp for 60 minutes. 7. Rinse off with water. Quantity: 5L. Pack of two.