How to Use PatioClean - PatioClean is used for more stubborn stains as you need the EXTRA strength solution, which is 50% stronger than the heavy duty solution and may be diluted with up to 6 parts water and 1 part PatioClean. To use PatioClean you can apply the solution and leave and within minutes you will begin to see results. Take the hard work out of cleaning your drive, block paving, fences, walls, brick work, stonework, paths, patios decking, gravelled areas and even roofs. Use neat to shift old and stubborn deposits or dilute for routine maintenance. Even when PatioClean still outperforms the rest and can treat up to 10m² per litre. Spruce up the grounds around your home this Spring and make your home the envy of your neighbours. Important Notes: This product is not for use on lawns, flowerbeds, vegetable plots or around trees and shrubs. Keep people and pets away from the treated area for 2 days.