Part No. 4000's


Pencool® 4000 Nitrite Free Cooling System Treatment is formulated specifically for Extended Life Coolants. The Nitrite Free formula can be used as a booster to extend antifreeze life, increase corrosion protection to help maintain your system, and increase vehicle longevity and uptime.
Features and Benefits:

  • Use as a booster to extend antifreeze life (ELC, OAT & NOAT)
  • Increases corrosion protection
  • Protects all metals commonly found in cooling systems
  • Protects against cavitation and wet sleeve liner pitting
  • Ideal for marine and non-glycol (water only) applications requiring ELC technology
  • Increase uptime, reduces maintenance expense and engine wear
  • Add 4.2% to make water only coolant
  • Passes the D4340 test for aluminum protection
  • Use PTK103 for testing in water only system
  • Yellow color, will not change color of OE coolant

Note: Not for use with conventional coolants requiring nitrite supplementation

Part # Quantity Net Contents Container
400016 12 / Case 16 fl. oz. Bottle
400005 1 / Case 5 Gallons Pail
400055 1 / Case 55 Gallons Drum

This product can expose you to chemicals including Ethylene Oxide, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to