Coolant is a mixture of water and antifreeze. Antifreeze lowers the freezing point of the mixture and raises the boiling point, and it contains additives that prevent corrosion, and lubricate pump seals. Ethylene glycol is the main ingredient of antifreeze, with the additives making up 10% or less of the total. A 50/50 mixture is generally recommended, and this provides freezing protection down to -34°F (-36.7°C) and boiling protection up to 265°F (129°C).

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    • (0 reviews)
      # sp94168
      Super Duty Antifreeze by Be Cool®. Volume: 1 Gal Quantity: 2 Great time-saving components to simplify your radiator installation. These accessories can help you achieve a clean, professional look.
      High quality at an affordable priceBuilt to match your exact requirements
      $29.99 - $56.63
    • (0 reviews)
      # sp95678
      Cooling System Lubricants by GUNK®. Cooling System Lubricant contains powerful cleaning agents and neutralizer that quickly dissolve rust, scale, grease, and corrosion deposits. It is completely safe for use with aluminum and all other...
      Green, Translucent4.5 to 6.0 pH
      $351.94 - $725.26
    • (1 review)
      # sp6401
      Premium Antifreeze/Coolant by Beck Arnley®. For one hundred years, Beck/Arnley has been providing premium OE quality parts for vehicles. Beginning with motorcycle parts in 1914 and transitioning to import vehicles in the 1950’s, brand...
      OE quality products from top original equipmentTop quality materials
      $13.39 - $29.17
    • (0 reviews)
      # sp24358
      Engine Coolant and Antifreeze by AISIN®.When you’re low on oil, coolant or some other fluid, you may be tempted to just run down to the local auto parts chain store. But before you waste your time and gas only to find high prices and...
      Convenient ready to use formula. No need to add water.Specialized inhibitors maximize temperature protection in today's high output engines.
      $14.07 - $15.41
    • (0 reviews)
      # sp126256
      Antifreeze by Vaico®. Original equipment manufacturer quality. Quality results from the consistent pursuit of an customer-focused strategy. Clients wishes are in the center of business. Vaico aim: the best quality for your...
      Targeted additives guarantee optimum lubricationApproved by OE manufacturer standards
      $8.21 - $30.37
    • (1 review)
      # 681879367
      Universal Purple Ice™ High Performance Radiator Coolant Additive by Royal Purple®. 12 oz. Purple Ice® is a high performance coolant additive and radiator fluid conditioner. Its advanced 2-in-1 corrosion inhibitor and wetting agent...
      Reduces surface tension of a coolant allowing more heat to transfer outside the radiator resulting in more horsepowerReduces hot spots in the engine and cylinder heads, reducing the possibility of engine failure
      $8.99 - $134.24
    • (0 reviews)
      # 81781219
      Universal Coolant Inugel Ultra by Motul USA®. 1.05 Quart. Concentrated formula (down to -54°C / -65°F) Concentrated anti-freeze to dilute with water.
      Protects the cooling system from freezing and metallic parts from corrosionProvides an excellent thermal exchange and therefore improves engine cooling efficiency
    • (0 reviews)
      # mpn358955803
      Universal MoCool Non-glycol Cooling Additive by Motul USA®. 16.9 oz. A non-glycol based radiator additive for use in racing applications where a glycol based product cannot be used. Engines run cooler up to 30°F (15°C). Improves...
      Cooling system optimal protection against corrosionRecommended for magnesium, aluminium alloys cases, cast iron, copper, brass and bronze systems
    • (0 reviews)
      # 197282578
      Universal Flex-a-Chill™ Radiator Coolant Additive by Flex-a-Lite®. Flex-a-Chill™ coolant additive is compatible with all types of antifreeze, and it provides 100-percent corrosion protection with straight water. It utilizes...
      Provides corrosion protection for aluminumPrevent scale and blockage
      $13.45 - $160.68
    • (0 reviews)
      # mpn358594818
      Universal Radiator Relief™ Additive by Design Engineering®. 16 oz. 1 Piece. Includes Rust and Corrosion Inhibitors. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art...
      High quality at an affordable priceExpertly made from premium materials
    • (0 reviews)
      # 97614914
      Universal CSP Coolant System Protector by Driven Racing Oil®. Includes Rust and Corrosion Inhibitors. 12 Oz, 12 x 12 oz. Bottle. Joe Gibbs Driven CSP Coolant System Protector offers cast iron and aluminum insurance. Your radiator, water...
      Boiling Point / Boiling Range: > 104 °C / 219 °FColor: Brown
      $8.99 - $107.89
    • (0 reviews)
      # mpn2807450211
      Universal Racecool High Performance Coolant Additive 1 Quart by Heatshield®. RACECOOL performance coolant is specifically formulated for today's high performance applications, including aluminum components. The best answer is that...
      Capable of reducing running temperatures by as much as 15°FWill not leave residue like antifreeze, completely dries
    • (0 reviews)
      # mpn154347100
      Universal 11 fl. oz 10 Minute Radiator Flush by Motor Medic®. Plastic Bottle. Dual action formula especially designed to remove grease and scum plus loose rust and scale. Especially useful when changing anti-freeze or engine coolant.
      Designed and manufactured using innovative technologiesWill help boost the performance of your vehicle
    • (0 reviews)
      # mpn157725236
      Universal 11 fl. oz. Radiator Anti-Rust & Water Pump Lube by Motor Medic®. Plastic Bottle. Stops cooling system rust, scale, and corrosion in all types of water-cooled engines. Protective fi lm prevents new rust forming. Neutralizes...
      Designed and manufactured using innovative technologiesWill help boost the performance of your vehicle
    • (0 reviews)
      # mpn4482724119
      Universal 2 oz. Radiator Repair by Motor Medic®. Plastic Bottle. A non-metallic solder. Use super heavy duty radiator cleaner to clean your cooling system thoroughly. Use water pump lubricant and rust inhibitor to keep it clean.
      Designed and manufactured using innovative technologiesWill help boost the performance of your vehicle
    • (0 reviews)
      # mpn4482724122
      Universal 5.5 oz. Multi-Purpose Radiator Sealant and Conditioner by Motor Medic®. Plastic Bottle. Multi-Purpose Radiator Sealant and Conditioner treats the entire cooling system. This product is made of high-quality materials to serve...
      Designed and manufactured using innovative technologiesWill help boost the performance of your vehicle
    • (0 reviews)
      # mpn4482724115
      Universal Liquid Kool™ 32 oz. Cooling System Protector by Motor Medic®. Plastic Bottle. Starts working immediately. Easy to use. Keeps cooling system cleaner. Prevents acid and corrosion build-up. Great for air conditioned cars.
      Designed and manufactured using innovative technologiesWill help boost the performance of your vehicle
    • (0 reviews)
      # mpn126712088
      Universal Radiator Complete Care by Prestone®. 22 oz. Radiator Complete Care is formulated with patented Grafted Polymer Technology to extend and protect water pump life by reducing friction and protecting against corrosion in just 1...
      Extends and protects water pump lifeFormulated with patented Grafted Polymer Technology
    • (0 reviews)
      # mpn126712081
      Universal Radiator Flush and Cleaner by Prestone®. 22 oz. Radiator Flush and Cleaner helps remove rust deposits and oily residue in an easy one step process. premium formulation helps maximize cooling system efficiency. Flush maximizes...
      A strong chelating compound binds rust and other corrosion deposits to help flush them out of the system prior to installing new antifreezeIntended for vehicles with heavier build ups of rust and radiator and heater core deposits
    • (0 reviews)
      # mpn359115871
      Universal 40-Below Radiator Treatment 32 oz by Pro-Blend®. 40 Below radiator treatment reduces coolant temperature up to 40 degrees. Originally developed for NASCAR racing conditions. 32 oz. can.
      For keeping your vehicle run more efficientlyDesigned to help prolong your vehicle parts’ life
    • (0 reviews)
      # 89258802
      Universal Cool-Aide Concentrate, 16 oz by Maxima Racing Oils®. Cool-Aide is an additive formulated to reduce engine temperatures and provides significantly better contact on heated surfaces allowing for greater and more efficient heat...
      Powerful concentrateApproved for racing on paved surfaces
      $8.10 - $94.81
    • (0 reviews)
      # 156438560
      Universal Dye-Lite™ Engine Coolant and Auto Body Leak Check Dye by Tracer Products®. TP-3900 fluorescent dye quickly finds leaks in radiators, hoses, water pumps and fittings. Just add 1 oz of the dye to a cooling system and allow it...
      High quality at an affordable priceExpertly made from premium materials
      $9.93 - $48.55
    • (0 reviews)
      # 156438562
      Universal Rite-Blend™ Extended Life Coolant Dye by Tracer Products®. Tracer Products has made life easier for technicians who service cars and trucks by introducing its new TP-3940 Dye-Lite® Rite-Blend™ blended fluorescent leak...
      High quality at an affordable priceExpertly made from premium materials
      $23.18 - $27.41
    • (0 reviews)
      # mpn4494301645
      Universal 16 oz. Pour-N-Go Head Gasket Sealer by BlueDevil®. The 16 oz. Pour-N-Go BlueDevil Head Gasket Sealer is formulated for the Do-it-Yourself customer who has limited time, or is not mechanically inclined. BlueDevil Pour-N-Go Head...
      Easy to use Pour-N-Go! Do-it-yourself formulaPermanent leak repair and sealant for head gaskets, heater cores, freeze plugs, and cooling system leaks
    • (0 reviews)
      # mpn4494301637
      Universal 16 oz. Radiator and Block Sealer by BlueDevil®. BlueDevil Radiator & Block Sealer is an easy-to-use formula that will repair and seal leaks in radiators and/or engine blocks.Radiator sealer does not contain solid or fibrous...
      Permanent repair for radiator and block leaksWorks effectively on plastic, aluminum and/or metal radiators
    • (0 reviews)
      # mpn4494301642
      Universal 32 oz. Head Gasket Sealer by BlueDevil®. BlueDevil Head Gasket Sealer will repair and seal leaks in blown head gaskets, warped or cracked heads, heater cores, and freeze plugs. BlueDevil head gasket sealant contains no solid...
      Good for Head Gaskets, Warped or Cracked Heads, Heater Cores, and Freeze PlugsContains no solid or particulate matter that can harm a vehicles engine
    • (0 reviews)
      # mpn4494301643
      Universal 32 oz. Radiator Flush by BlueDevil®. BlueDevil Radiator Flush restores efficiency to vehicles by helping remove grease, rust, grime or any other build up that occurs during normal vehicle use. Specially formulated coolant...
      Extends Vehicle LifeAdvanced Cleaning Power
    • (0 reviews)
      # mpn358502353
      Universal Dike Temporary Radiator Stop Leak 16 oz by C&R Racing®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind, this product will...
      High quality at an affordable priceExpertly made from premium materials
    • (0 reviews)
      # mpn358502354
      Universal Safe Coolant Corrosion Inhibiter Additive 16 oz by C&R Racing®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind, this product...
      High quality at an affordable priceExpertly made from premium materials
    • (1 review)
      # mpn3064649391
      Universal 16 oz UltraCool Advanced High Performance Cooling Additive by Zirgo®. 1 Piece. Keep your ride cool and preserve it's vintage cooling system with Zirgo™ high performance UtlraCool™ cooling system additive. It can reduce...
      Made in the USAMaximum Cooling Performance

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    Although they are just a small percentage of the liquid, it is the additives that differentiate between the different types of antifreeze. IAT (Inorganic Acid Technology) is the traditional green antifreeze, and has silicate or phosphate additives for protection. However, these additives deplete quickly, requiring this type of coolant to be replaced frequently. OAT (Organic Acid Technology) antifreeze uses additives mostly comprised of organic acids, while HOAT (Hybrid Organic Acid Technology) has both organic and inorganic additives. OAT and HOAT antifreeze are considered long-life coolants and are the type specified for most modern vehicles. The types of coolant should not be mixed, as the additives in one may not be compatible with the other. For optimal protection, always use the type of antifreeze specified by the vehicle manufacturer.

    Even long life coolants eventually wear down and are not able to provide freezing and boil over protection, and the additives become depleted. Most vehicle manufacturers have a recommended coolant replacement interval. When replacing the coolant, it’s a good idea to flush the cooling system, especially if there is evidence of scale and mineral buildup. A radiator flush product should be used as it will remove more rust, scale and sediment than plain water alone. Follow the directions on the flush container label, which may entail draining and filling the system several times. Always properly dispose of used coolant and wipe up any spills. Ingesting ethylene glycol can be fatal and children and animals are attracted to its sweet smell. Coolant also picks up metal particles like iron, aluminum, brass, copper, and lead, as it circulates through the cooling system, which classifies it as a hazardous waste.

    High performance engines that make lots of horsepower also tend to generate a lot of heat, and it’s not uncommon for vehicles with these engines to run hotter than their owners would like. Excessive heat can cause expensive engine damage, but the cure for the problem can be as simple as including a coolant additive when filling your system. These additives contain agents that reduce air bubbles and air pockets so there is complete coolant contact with all internal surfaces. This increases the coolant’s heat transfer abilities resulting in a cooler running engine. These additives also include rust and corrosion inhibitors to prevent buildup that can reduce cooling system efficiency.

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    Guides & Articles

    Useful articles fast to read and guides easy to understand written by mechanics and car enthusiasts to turn your shopping experience with CARiD into a pleasure

    • Replacement Engine Cooling Parts
      October 27, 2014
      Antifreeze Explained: What It Does And Why It's...
      "Antifreeze" is a chemical, primarily consisting of ethylene glycol, which when mixed with water serves to lower the freezing point and raise the boiling point of the...
      by Michael Grayen
    • Replacement Engine Cooling Parts
      February 07, 2014
      Servicing Your Vehicle's Cooling System
      Everyone knows that your vehicle's engine needs its oil and filter changed at regular intervals. Most folks also know that there are other items which need regular...
      by Timothy Zahl

    Antifreeze & Additives Reviews

    Average rating:  4.5  4.5 - 13 reviews
    4.5 of 5
    Good Stuff
    My Nissan van loves this coolant.
    DPosted by Dewayne (Stanton, CA) / July 2, 2017
    2011 Nissan Quest
    Was this review helpful for you? Yes
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