Top 10 Best Radiator Coolant Additive In [2022]

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You can trust our selection for Radiator Coolant Additive Reviews. Because We have worked hard studying and analyzing 45785 reviews for Radiator Coolant Additive and rating them. It was a difficult job to list only ten products for Radiator Coolant Additive where thousands of them available online. I hope it will help you to take final decision for Best Radiator Coolant Additive.

NoProductScoreAction
1Royal Purple 01600 Purple Ice Super-Coolant Radiator Additive - 12 oz9.8Buy on Amazon
2Prestone Super Radiator Anti-Rust (AS170Y)9.4Buy on Amazon
3Lubegard 96430 Heavy Duty 2-in-1 Coolant Treatment9.4Buy on Amazon
4VP Racing Fuels Radiator System Additive - Cool Down9.4Buy on Amazon
5Red Line (80204) Water Wetter - Coolant Additives - 12 Oz Bottle9.2Buy on Amazon
6Royal Purple 01600 Purple Ice Radiator Coolant Additive 12 oz. Bottle Pack of 49.2Buy on Amazon
7Mishimoto - MMRALC Liquid Chill Radiator Coolant Additive8.8Buy on Amazon
8VP Racing Fuels Radiator System Additive - Cool Down8.6Buy on Amazon
9Design Engineering 040200 Radiator Relief Coolant Additive for All Water Cooled Engines8.4Buy on Amazon
10Keyser’s Pro Blend 40 Below - Engine Coolant Additive8.2Buy on Amazon

Comparison Chart for Best Radiator Coolant Additive

In this article we've included our suggestions for the Radiator Coolant Additive after analyzing 45785 reviews.

Disclaimer: As An Amazon Associate I Earn From Qualifying Purchases.

Table Of Content:

1. Royal Purple 01600 Purple Ice Super-Coolant Radiator Additive – 12 oz

  • OPTIMIZES PROTECTION
  • Prevents erosion and electrolysis
  • Compatible with all coolants types
  • Contains lubricants to protect the water pump
  • Fit type: Vehicle Specific

2. Prestone Super Radiator Anti-Rust (AS170Y)

3. Lubegard 96430 Heavy Duty 2-in-1 Coolant Treatment

  • Provides 2-in-1 corrosion protection and temperature reduction
  • Provides complete protection from corrosion and chemical electrolysis
  • Protects wet sleeve cylinder liners from cavitation erosion
  • Prevents build-up of scales, deposits and slime that cause overheating
  • Significantly extends life of water pump impellers and seals

4. VP Racing Fuels Radiator System Additive – Cool Down

  • Cool Down coolant additive improves the performance of coolant and is safe for all radiator systems.
  • Reduces cylinder head temperatures up to 75°F and decreases engine temperature up to 30°F! Cool Down increases coolant flow for better heat transfer.
  • Lubricates vital components and approved by most race sanctions.
  • Treatments last for one year or 30,000 miles, whichever comes first.
  • Open the bottle and add contents straight into the radiator or coolant reservoir.

5. Red Line (80204) Water Wetter – Coolant Additives – 12 Oz Bottle

  • Cutting edge technology – We at red line created this industry, pushing bubbles out of the way to ensure efficient & effective engine cooling.
  • Ultimate cooling performance – Coolant additive with a unique agent that lowers temperatures by reducing and eliminating bubbles or vapor barrier that form on hot metal surfaces.
  • Perform & protect – Waterwetter protects from rust & corrosion, allowing the use of straight water in racing or reduced antifreeze levels in warm climates.
  • Easy to use – Use one bottle for most cars & light trucks, treats 3 to 5 gallons.
  • Why red line – Established in 1979, red line products perform & protect better than any on the market.

6. Royal Purple 01600 Purple Ice Radiator Coolant Additive 12 oz. Bottle Pack of 4

7. Mishimoto – MMRALC Liquid Chill Radiator Coolant Additive

  • Formulated to prevent future corrosion and reduce existing build-up
  • Decreases high coolant temperatures and does not require mixing
  • Net Weight: 4 fl oz. / Note: Non-corrosive 100% recyclable
  • Truck & SUV: 2 bottles / Sport Compact Cars: 1 bottle / ATV & Dirt Bike: 1oz per qt
  • Mishimoto Lifetime Warranty
  • Net Weight: 4 fl. oz./118ml
  • Non-corrosive
  • 100 percent recyclable
  • Made in USA

8. VP Racing Fuels Radiator System Additive – Cool Down

  • Cool Down coolant additive improves the performance of coolant and is safe for all radiator systems.
  • Reduces cylinder head temperatures up to 75°F and decreases engine temperature up to 30°F! Cool Down increases coolant flow for better heat transfer.
  • Lubricates vital components and approved by most race sanctions.
  • Treatments last for one year or 30,000 miles, whichever comes first.
  • Open the bottle and add contents straight into the radiator or coolant reservoir.

9. Design Engineering 040200 Radiator Relief Coolant Additive for All Water Cooled Engines

  • No mixing required; just add to cooling system and reduce engine operating temperature up to 30 degrees Fahrenheit.
  • Formulated with a corrosion inhibitor and reduces pre-existing scale build-up
  • For use in all water cooled engines
  • Compatible with water and all anti-freeze mixtures
  • Safe with all alloys – 100% biodegradable, non-corrosive and non-toxic additive
  • Fit type: Vehicle Specific

10. Keyser’s Pro Blend 40 Below – Engine Coolant Additive

  • coolant, radiator, 40 degrees, problend, nascar, additive, reduce temperature

Radiator Coolant Additive Buying Guide


Does the thought of finding a great Radiator Coolant Additive stress you out? Has your mind been juggling between choices when it comes to buying Radiator Coolant Additive in general, specifically regarding which model to choose?
If that’s the case, know that you’re not alone. Many people find it tough to buy the perfect Radiator Coolant Additive for themselves. We understand the stress associated with the buying process!
Since you’re here, you are obviously curious about Radiator Coolant Additive Reviews. You’ve been bombarded with information, so you need to find a reputable source with credible options before you make any decisions on which product would be best for your needs.
There are many sources that’ll provide you with that information- buying guides or ratings websites, word-of-mouth testimonials from friends or family members, online forums where users share their personal experiences, product reviews specifically found all over the internet and YouTube channels. Only thorough research will ensure that you get the right product.
But that’s not always easy, right? That's why we've taken time to compile a list of the best Radiator Coolant Additive in today's market, on your behalf, so that there will be no more worries for you.
How did we come up with the list, you ask? How did we create this buying guide?
  • First, our algorithms collected as much information available about these products from trusted sources.
  • We employed both Artificial Intelligence and large data volume to validate all collected information.
  • Then our AI ranked them on their quality-to-price ratio using industry-standard criteria that let us pick the best Radiator Coolant Additive currently on the market!
The products aren’t chosen randomly. We consider several criteria before assembling a list. Some of the criteria are discussed below-
  1. Brand Value: What happens when you go for a not-so-reputable brand just because the price seems cheap? Well, the chance of getting a short-lasting product goes higher. That’s because the renowned brands have a reputation to maintain, others don’t.
Top Radiator Coolant Additive brands try to offer some unique features that make them stand out in the crowd. Thus hopefully, you’ll find one ideal product or another in our list.
  1. Features: You don’t need heaps of features, but useful ones. We look at the features that matter and choose the top Radiator Coolant Additive based on that.
  2. Specifications: Numbers always help you measure the quality of a product in a quantitative way. We try to find products of higher specifications, but with the right balance.
  3. Customer Ratings: The hundreds of customers using the Radiator Coolant Additive before you won’t say wrong, would they? Better ratings mean better service experienced by a good number of people.
  4. Customer Reviews: Like ratings, customer reviews give you actual and trustworthy information, coming from real-world consumers about the Radiator Coolant Additive they used.
  5. Seller Rank: Now, this is interesting! You don’t just need a good Radiator Coolant Additive, you need a product that is trendy and growing in sales. It serves two objectives. Firstly, the growing number of users indicates the product is good. Secondly, the manufacturers will hopefully provide better quality and after-sales service because of that growing number.
  6. Value For The Money: They say you get what you pay for. Cheap isn’t always good. But that doesn’t mean splashing tons of money on a flashy but underserving product is good either. We try to measure how much value for the money you can get from your Radiator Coolant Additive before putting them on the list.
  7. Durability: Durability and reliability go hand to hand. A robust and durable Radiator Coolant Additive will serve you for months and years to come.
  8. Availability: Products come and go, new products take the place of the old ones. Probably some new features were added, some necessary modifications were done. What’s the point of using a supposedly good Radiator Coolant Additive if that’s no longer continued by the manufacturer? We try to feature products that are up-to-date and sold by at least one reliable seller, if not several.
  9. Negative Ratings: Yes, we take that into consideration too! When we pick the top rated Radiator Coolant Additive on the market, the products that got mostly negative ratings get filtered and discarded.

These are the criteria we have chosen our Radiator Coolant Additive on. Does our process stop there? Heck, no! The most important thing that you should know about us is, we're always updating our website to provide timely and relevant information.
Since reader satisfaction is our utmost priority, we have a final layer of filtration. And that is you, the reader! If you find any Radiator Coolant Additive featured here Incorrect, irrelevant, not up to the mark, or simply outdated, please let us know. Your feedback is always welcome and we’ll try to promptly correct our list as per your reasonable suggestion.

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