Camco 30873 Xtreme Blue Concentrated Windshield Washer Tab - 5 Tabs Makes up to 5 gallons of premium washer fluid (one tab makes one gallon) Biodegradable, non-toxic and safe for rubber or clear coats Dissolves quickly For enhanced cleaning power add one tab to a gallon of water, a gallon of +32 degree windshield washer fluid or your vehicles washer fluid resevoir Removes road film, bugs, dirt and grime