We formulate Cool Down coolant additive not just for gasoline engines. It also works great as a diesel coolant additive.It improves the performance of coolantand issafe for all radiator systems. It's ideal for racing, street, RV and tow vehicle applications. Our product reduces cylinder head temperatures up to 75F and decreases engine temperature up to 30F! Cool Down increases coolant flow for better heat transfer. Furthermore, it lubricates all vital components and is approved by most race sanctioning bodies. One 16oz. bottle treats cooling systems of 12-20 quarts. For straight water applications, we recommend adding 50% more Cool Down. Additionally, diesel applications require twice the normal amount of Cool Down.

Treatments last for one year or 30,000 miles, whichever comes first. We do suggest changing your coolant every 2 years. When using as a diesel coolant additive, we recommend using twice the suggested amount for full protection of wet sleeve cylinder liners. Another key point is that you should use 2 oz. of Cool Down for every quart of coolant for Powersports applications.


Stay Frosty Glycol-free Race-Ready racing coolantas well asStay Frosty Hi-Performance engine coolant.

Advantages Of Cool Down

• Reduces cylinder head temps 75F and overall coolant temps by up to 30F
• Improves coolant flow for better heat transfer
• Lubricates all vital components
• Protects sensitive aluminum alloys

Frequently Asked Questions

Can you mix this coolant additive with antifreeze?
Yes, you can. Cool Down works great with antifreeze. It is formulated for use with todays OAT and HOAT-formula engine coolants. We recommend changing your coolant every 2 years.

How do I use Cool Down?
Just open the bottle and add the contents straight into the radiator or coolant reservoir. If you have access to a radiator cap, pouring Cool Down directly into the radiator is the preferred method. One 16 oz. bottle will treat cooling systems of 12-20 quarts.

Will your coolant additive work in cold weather climates?
If used as directed, it shouldnt disrupt the freeze protection provided by traditional antifreeze that contains glycol.