Gunk Concentrated Windshield Wash and De-Icer with Ammonia makes 1 gallon of de-icer or 6 gallons of windshield wash solvent. It's small size and weight helps environment through less transportation-emissions. As an anti-freeze, it helps protect windshield washer systems from damaged caused by temperatures as low as -31-degree Fahrenheit. Streak free ammonia formula. This solvent is easy to use by just pouring some or all into the fluid tank and adding clean water. 50 state compliant. California Prop 65 Warning: This product can expose you to chemicals including Methanol which is known to the State of California to cause birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov. -