Prestone AS246-6PK Ice and Frost Shield Vehicle Glass Treatment, 32 oz. (Pack of 6) Prevents morning frost, light ice, and snow from sticking to windshield and wiper blades Dramatically reduces the time, effort, and hassle it takes to clear your winter window glass Provides durable protection without compromising visibility Can be used on a daily basis without altering your vehicle's windshield Imparts a balance of hydrophobic and hydrophilic characteristics to create an invisible shield between environment and automotive glass