With AutoSport RainAway, you'll enjoy clearer vision and reduced glare on dark, rainy nights. It goes on easily and bonds with glass to repel even heavy rain. You'll also enjoy reduced wiper chatter and have an easier time scraping away snow and ice in winter. One 16 oz. bottle can treat most car or SUV windshields and windows four times! Each treatment lasts 3-6 months, too, so it's a much better value than other brands.