40 Below Radiator Treatment

  • 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

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Proposition 65 Warning

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