Formula 1 Windshield Wash Concentrate (237 ml)Formula 1, the world's largest car care brand, now brings to you a much needed cleaning solution for your car windshield. The Formula 1 windshield wash concentrate now gives you a clear streak free view of the road. Simply squeeze some concentrate into the measuring chamber of the bottle and add to tap water. One bottle of can make over 5 gallons of windshield wash. Its powerful cleaners remove road film, dirt and insects to improve vision.