• Available in both 16 ounce and 32 ounce.
• Keyser Manufacturing’s 40 Below coolant additive is designed to reduce temperatures by up to 40 degrees F.
• The additive maintains coolant temperature between 180-210 degrees F when (1) 32 oz. can is added to a full system (mixture of 80 percent distilled water/20 percent ethylene glycol).
• 40 below can be used with anti-freeze, but for best results use without
• Under no circumstances should you ever use or mix with Dexcool
• 40 Below works wonders in your street rod, RV, racecar, marine or anything with a high performance motor

NOTE: Shipping to Continental United States Only. No P.O. Boxes. 

SKU: 530 403X