Create a captivating outdoor space with this Pro-Kleen Patio and Driveway Cleaner. The super-fast and effective way to get your patio, driveway, block paving, concrete flags, steps and paths looking brand new once again. Apply the solution to the affected area, leave for two hours (or overnight if possible), and then wash down with a hose. It begins destroying dirt and grime as soon as it's applied, and areas that haven't been cleaned for a long time may require a second treatment. Directions for use: Use the cleaner with a watering can or a pressure sprayer for maximum coverage, and agitating with a brush can help speed up the process. Only when dry may children and pets be reintroduced to the area. Do not use when rain is expected in the following eight hours. Quantity: 20L.