Aqua Charge Windshield Washer Ultra Concentrate. Methanol free, simply dye and cleaning solution! Add Methanol for a freezing point of -20°F, normal freezing point of Aqua Charge is 32°F (13 gallons of Methanol per 55 gallon mixture). Trusted since 1991. Note: This is NOT a ready to Use. This is ULTRA CONCENTRATED, designed to make 55 GALLONS of FINISHED product.