40 Below Radiator Treatment

  • Keyser Manufacturing’s 40 Below 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, race car or anything with a high performance motor.
  • 32oz container

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


SKU: 530 4032



Proposition 65 Warning

Additional Items

Related Products

More Like This

Reviews (0)


There are no reviews yet.

Only logged in customers who have purchased this product may leave a review.

You were not leaving your cart just like that, right?

Enter your details below to save your shopping cart for later. And, who knows, maybe we will even send you a sweet discount code :)