HG patio cleaner is a highly concentrated cleaner that has been specially designed for the cleaning of dirty and stained concrete – paving slabs and gravel. Pour water over the patio first – paying special attention to the grout. Brush away any puddles. Pour the contents of the bottle and 4 litres of water in to a container which a scrubbing-brush will fit into. A washing up bowl is ideal. Dip the scrubbing-brush into the container and apply the liquid – scrubbing as you go. Now allow a few minutes for the product to work. Then scrub a little while longer and before the liquid dries – rinse the surface thoroughly with water.