Restore your home's charm with this SmartSeal Xtreme Patio Cleaner. This fast-acting, high-performance patio cleaning product contains four powerful active ingredients. It offers a simple way to keep any patio clean without the need for pressure washing. The patio must remain wet throughout the 60 minutes, as the product becomes inactive once dry. Most ingrained organic matter and grime will be removed after one application, but sometimes, a second application may be required to remove all black and white spot algae. Diluted 1:1, 5L of the product can cover up to 40m². It is a proven, tested, and trusted driveway cleaner that can be applied using a sprayer or watering can. Instructions for use: 1. Sweep away loose debris and areas with a heavy build-up of dirt and grime. 2. Wet surface area with water. 3. Dilute the product at a ratio of 1:1. If removing the black spot, don't dilute. 4. Apply product to the surface using a watering can or sprayer. 5. Make sure that the surface area doesn't dry out before rinsing off. 6. Leave on the surface area for up to 60 minutes. 7. Rinse the area with water. Quantity: 5L. Pack of two.