We threw together some of the shots from our “Green Concrete” patio cleaning adventure. The process was simple. I mixed the product 10:1 with water in a pump-up sprayer (also could have used the siphon tube on the pressure washer). Then i wet the concrete and applies the mixed product to the wet concrete. I gave the product about 5 minutes to work and then fired up the pressure washer. I have never seen such dirt, grim, and algae come off so easily. The difference is clear with Krud Kutter products. They clean what ordinary cleaner simply can’t and are safe, fast, and effective!