Stinger Ultra Blue Glass Cleaner Concentrate is a dark blue, highy concentrated glass cleaner. Designed to remove dirt, grime and bugs on glass, mirrors and chrome. Product is biodegradable, ammonia free and willnot smear of leave streaks. Works excellent in washer fluid resevoirs in warm weather states or during the summer only in Northern states. Ideal for fleets and rental car companies as an economical alternative to standard washer fluid chemicals.