Windex Outdoor Concentrated Cleaner 32 fl oz. Windex Outdoor Concentrated Cleaner is the easy way to clean and shine windows patio furniture brick and other outdoor surfaces! The specially-designed 32 ounce spray bottle conveniently attaches directly to your garden hose. Just spray rinse and let dry to clean stubborn dirt and grime outside your home leaving behind only our famous streak-free shine. The formula will not harm plants. Windex Outdoor Concentrated Cleaner contains no phosphorus and is ammonia-free. Avoid using on automobiles and newly sealed asphalt. Test on small area of painted or wood surfaces before spraying entire area.