Skip To Content


    Cool-Gard II Extender is the only treatment that should be used with Cool-Gard II.
    • Use Cool-Gard II Extender to replenish the level of protective additives in Cool-Gard II systems only if the Test Strips indicate the need.
    1.08 lbs.
    16 oz. (473mL)
    Deere Notes
    Engine Coolant Conditioner - COOL-GARD II EXTENDER

    Related Products


    We are committed to protecting your privacy and we don’t sell your personal information to anyone. Our refined Privacy Policy addresses collection and use of personal information. Like most websites, this one uses cookies for functional and analytical purposes. To learn more, please read our updated Privacy Policy. Click “OK” to acknowledge the notice of the updated Privacy.