Super-concentrated with 3 times the cleaning power of ordinary wash. Each tablet makes 1 gallon of top quality cleaner. Easy to use, simply add 1 tablet to 1 gallon of water or drop in reservoir of clean water Dissolves completely to remove bugs, road film, dirt, and grime. Leaves windshields sparkling clean. Economical solution, 303 Instant Windshield Washer Tablets significantly reduce the amount of plastic containers in landfills.