McKee's 37 Anti-Frost Windshield Washer Fluid keeps your windshield clear and clean in harsh winter weather. The advanced washer fluid removes dirt and road film with no streaks or smears. It actually prevents re-icing. Also, it can be used on headlight lenses. If you have ever thought, only if the windshield is not iced over this morning. Well, that can actually happen. Use McKee's 37 Anti-Frost Windshield Washer Fluid regularly. Your windshield will be coated to prevent re-icing. Just add a quart of this concentrated cleaner to your existing washer fluid. It is compatible with other washer fluids.