Green Cleaner Extreme is a powerful, concentrated solution created to effectively remove mould and algae from outdoor surfaces and patios. 5 Litres of the product can cover up to 20 m2, and its spray-and-go formula demands no rinsing with results within 2-3 days. Suitable for: Patios, Wood and composite decking, Garden furniture, Tarmac, concrete, block paving, stone, masonry, cladding, brickwork, PVC and aluminium windows, Roof tiles, Guttering, Gravel, Fencing, Conservatories, greenhouses, Boats and sheds Directions of use: This product doesn’t need to be diluted, it is ready to use. It is advisable to clean the area before use: remove any loose dirt so that the area is smooth and ready for application. Green Cleaner must be used on dry surfaces, with no rain forecast for the next 12 hours. Once dry, surfaces are safe for children and pets. You will begin to see results within 2-3 days.