Cleans virtually anything outdoors. Perfect for cleaning stains from algae, mold and mildew. It's your best option for cleaning wood decks, gutters, stucco, patio furniture, canvas awnings, vinyl fences...you name it! And best of all...It's clean, when YOU want it clean! No more pressure washing and saves water; simply spray on and rinse off. Does not harm your plants and grass. It is great for prepping the surface before painting, staining and varnishing, to ensure a nice, clean surface.