30 Seconds outdoor cleaner cleans algae, mold, and mildew from anything outdoors. 30 Seconds Outdoor Cleaner can be used on a variety of surfaces; wood decks, concrete driveways, sidewalks, stucco, vinyl siding, brick walls, plastic outdoor furniture, you name it. If it's outdoors and dirty from humidity and wet weather, 30 Seconds can clean it all. Spray on and hose off. It's clean when you want it clean.