Formulated to meet or exceed the performance requirements of every major car and truck manufacturer in order to provide maximum protection.

  • Global Coolant
    Features a patented technology made for all cars worldwide, regardless of make, model, year or original antifreeze color.

    50/50 product fullstrength product Find a Store
  • Long Life Coolant
    Compatible for use with all automobiles and light-duty trucks, regardless of make, model, year or original antifreeze color.

    50/50 product fullstrength product Find a Store
  • Cool Coolant
    Compatible for use in GM® Cars and Trucks requiring DEX-COOL® Coolant.

    50/50 product fullstrength product Find a Store
  • Conventional Coolant
    The original blue bottle that started it all offers maximum antifreeze coolant protection against scale, rust, corrosion, freeze-up and boil-over.

    50/50 product fullstrength product Find a Store
  • OET EUROPEAN VEHICLE EXTENDED LIFE BLUE
    Engineered for use in all European vehicles requiring a BLUE SILICATE-ENHANCED HOAT extended life antifreeze + coolant.

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  • OET EUROPEAN VEHICLE COOLANT EXTENDED LIFE PINK
    Engineered for use in all European vehicles requiring a PINK SILICATE-FREE OAT extended life antifreeze + coolant.

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  • OET EUROPEAN VEHICLE EXTENDED LIFE VIOLET
    Engineered for use in all European vehicles requiring a VIOLET SILICATE-ENHANCED OAT extended life antifreeze + coolant.

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  • OET ASIAN VEHICLE EXTENDED LIFE RED/PINK
    Engineered for use in all Asian vehicles requiring a RED or PINK PHOSPHATE-ENHANCED OAT extended life antifreeze/coolant.

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  • OET ASIAN VEHICLES EXTENDED LIFE GREEN
    Engineered for use in all Asian vehicles requiring a GREEN PHOSPHATE-ENHANCED OAT extended life antifreeze/coolant.

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  • OET ASIAN VEHICLES EXTENDED LIFE BLUE
    Engineered for use in all Asian vehicles requiring a BLUE PHOSPHATE-ENHANCED OAT extended life antifreeze/coolant.

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  • SIERRA
    Formulated with propylene glycol to make it safer than conventional antifreeze for pets and wildlife.

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FIND THE RIGHT ANTIFREEZE/COOLANT FOR YOUR VEHICLE:

 


WHAT IS ANTIFREEZE?

Antifreeze, also known as engine coolant, is a glycol based liquid that is used in the radiator of a vehicle’s engine to maintain its temperature.

WHAT DOES ANTIFREEZE DO?

Antifreeze, as its name implies, prevents the water in an engine’s radiator from freezing in colder temperatures. When referenced as a coolant, the liquid functions as a convective heat transfer to prevent overheating of a vehicle’s engine.

WHERE DOES ANTIFREEZE GO?

Antifreeze goes into the radiator of a vehicle’s engine. Click here to visit the PEAK® DIY Hub to learn more about antifreeze and radiator flushes.

WHAT IS ANTIFREEZE MADE OF?

Antifreeze has different chemical compositions depending on the type of antifreeze used. Inorganic Acid Technology (IAT) antifreeze can be either ethylene glycol (EG) or propylene glycol (PG). Organic Acid Technology (OAT) antifreeze is primarily ethylene glycol (EG) based. Hybrid Organic Acid Technology (HOAT) antifreeze is a combination of Inorganic Acid Technology (IAT) and Organic Acid Technology (OAT).

WHAT COLOR IS ANTIFREEZE?

Antifreeze colors include red, orange, yellow, pink, blue and green. Different colored antifreeze is used to identify the type of antifreeze being used. Inorganic Acid Technology (IAT) antifreeze is green in color. Organic Acid Technology (OAT) antifreeze is orange, red, green, pink or blue. Hybrid Organic Acid Technology (HOAT) antifreeze is orange or yellow in color.

HOW DO YOU CHECK YOUR ANTIFREEZE? HOW MUCH ANTIFREEZE DO I USE?

Antifreeze can be checked by opening the radiator cap and seeing whether the liquid reaches the Full line.

HOW DO YOU DISPOSE OF ANTIFREEZE?

Antifreeze can be disposed of legally and safely by taking it to any major auto parts store.


Steps to Checking the Condition and Level of Your Engine Coolant

Notes: 1) Before starting, locate the radiator, coolant overflow reservoir, and pressure cap. The reservoir will be located at a high location on either side of the engine and may be near the radiator or at the back of the engine near the windshield. 2) The cooling system pressure cap may be on a remote overflow reservoir if not on the radiator.

 

Pressure Cap on or Near the Radiator (Typical on older vehicle models)

CAUTION: DO NOT REMOVE PRESSURE CAP WHEN ENGINE IS HOT.

 

1- With the engine off and cool, remove the pressure cap from the radiator.
2- The coolant level should be at the top of the radiator, ideally flush with the bottom of the pressure cap seat.
3- If the coolant level is low, add either 50/50 pre-mixed antifreeze/coolant or a 50/50 mix of antifreeze/coolant concentrate and good quality water until the coolant level reaches the cap seat. Replace the pressure cap.
4- Next, check owner’s manual for recommended cooling system maintenance, and note the guidance given for the level of antifreeze/coolant to be kept in the reservoir.
5- Locate the fill line on the side of the overflow reservoir. If the coolant level is low, remove the reservoir cap and add either 50/50 pre-mixed antifreeze/coolant or a 50/50 mix of antifreeze/coolant concentrate and good quality water until the coolant level reaches the level marked on the tank. Replace the cap.

 

Pressure Cap on the Overflow Reservoir (Typical on newer vehicles)

 

CAUTION: DO NOT REMOVE PRESSURE CAP WHEN ENGINE IS HOT.

 

1- Make sure the engine is off and cool. Check owner’s manual for recommended cooling system maintenance, and note the guidance given for the level of antifreeze/coolant to be kept in the reservoir.
2- Locate the fill line on the side of the tank. If the coolant level is low, remove the pressure cap and add either 50/50 pre-mixed antifreeze/coolant or a 50/50 mix of antifreeze/coolant concentrate and good quality water until the coolant level reaches the level marked on the tank. Replace the pressure cap.
Periodically check coolant level and freeze protection.

 

For more information and videos on engine coolant maintenance, check out our DYI videos.

PEAK offers two Coolant strengths:

50/50 is a blend of coolant/antifreeze and deionized water. The pre-diluted formulas are great for topping off or complete flush and fill.

FULL  STRENGTH is used by those who wish to dilute the fluid themselves, or for “balancing” the ration in the cooling system.