Best Radiator Conditioners & Protectants (April 2024) - Rated by CherryPicks' Experts

At a Glance: Our Top Picks

Top 1

AUTOPROFI Radiator Conditioner - Made in Germany TUEV Approved

9.9
CPR Score
Top 2

Design Engineering 040202 Radiator Relief Cooling System Flush, 16 oz.

9.7
CPR Score
Top 3

RMI-25 Cooling System Treatment 8 ounce

9.6
CPR Score
Tips


Our team has analyzed 69 products of different Oils & Fluids brands, including Fram, ATP Automotive, Prestone, Design Engineering, VP Racing Fuels, Bar's Leaks, Gunk, AUTOPROFI, Pro-Blend, Motor Power Care, LTGJJ, Wonder, RMI-25 And Cyclo. The following list of top 12 Radiator Conditioners & Protectants is prepared for the customers by analyzing 69 Radiator Conditioners & Protectants reviews and comparing different features. 

* Cherrypicksreviews.com is reader-supported, Our editor review, and recommend the best products based on extensive data analysis, if you click on the product links, we may earn a commission through qualifying products purchased.

The Best Radiator Conditioners & Protectants Rated by CherryPicks

Market Overview
Radiator Conditioners & Protectants Reviewed
  • Reviews Analyzed: 1,435 Items
  • CPR Avg. Rating: 9.4 / 10
12 Products Evaluated
  • Highest Price: $120.32
  • Lowest Price: $3.69
  • Avg. Price: $41.63
Price Disclaimer

Top 12 Radiator Conditioners & Protectants on Amazon (Verified You can Buy)

Top 1

AUTOPROFI Radiator Conditioner - Made in Germany TUEV Approved

AUTOPROFI

Ratings for AUTOPROFI (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
European Parts -

Features

Radiator Conditioner protects against rust, corrosion and lime scale
Lubricates valves, thermostats and the water pump
Top 2

Design Engineering 040202 Radiator Relief Cooling System Flush, 16 oz.

Design Engineering
40202
0.0 x 0.0 x 0.0 Inches
1.1023 Pounds

Ratings for Design Engineering (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com -
Performance Parts Racing 9,618

Features

Concentrated cleansing agent that effectively removes rust and mineral deposits
Dissolves oily residue build-up left behind in old antifreeze and coolant mixtures
Show More
Top 3

RMI-25 Cooling System Treatment 8 ounce

RMI-25

Ratings for RMI-25 (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
RMI-25 Dealer -
Top 4

VP Racing Fuels Radiator System Additive - Cool Down, 16 Ounces (3 Pack). Safe for All Radiators. Decreases Engine Temps Up To 30 Degrees F.

VP Racing Fuels
3x2085
0.0 x 0.0 x 0.0 Inches
0.0 Pounds

Ratings for VP Racing Fuels (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Spreetail 37
HRP / Power Oil Center 1,296
J J Motorsports -

Features

Cool Down coolant additive improves the performance of coolant and is safe for all radiator systems. It's ideal for racing, street, RV and tow vehicle applications
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
Show More
Top 5

Prestone AS105 Radiator Flush and Cleaner - 22 oz. - 2 Pack

Prestone
PRESTONE - AS105 - 2/PACK
1.375 Pounds

Ratings for Prestone (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
G.P.S. 360
Capital Supply 2,771
SportingDoc 88
Multi Brands 305 -
B and S Supply 1,809

Features

Prestone AS105 Radiator Flush and Cleaner - 22 oz. - 2 Pack
Top 6

ATP Automotive AT-202 ATF Protectant Synthetic Transmission Additive

ATP Automotive
AT-202
7.0 x 4.5 x 4.0 Inches
0.5004 Pounds

Ratings for ATP Automotive (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com -
Engines Stores ✅✅ 9,761
alineauto -

Features

Synthetic formula protects transmission by reducing internal heat & wear
Resists fluid thermal breakdown, oxidation, varnish and sludge
Show More
Top 7

Bar's Leaks 1196 Radiator Stop Leak - 11 oz. , Grey

Bar's Leaks
1196
1.6 x 2.4 x 5.0 Inches
0.5 Pounds

Ratings for Bar's Leaks (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com -
Moofin 298
Staples Auto Parts -
Jamlyn-Supply 555
Bicyclingfanatic -

Features

Works with all types and colors of anti-freeze coolant
Stops and seals coolant leaks
Show More
Top 8

Cyclo - Coolant Booster

Cyclo
C53-EACH
3.0 x 1.75 x 8.0 Inches
0.875 Pounds

Ratings for Cyclo (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Discount Car Care Products -

Features

Extends coolant life
Restores additives contained in a full gallon of quality anti-freeze
Show More
Top 9

Design Engineering 040204 Radiator Relief Coolant Additive for Diesels, 16 oz.

Design Engineering
40204
10.0 x 4.0 x 2.0 Inches
1.1023 Pounds

Ratings for Design Engineering (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Amazon.com -

Features

Blended for extreme use
Decrease coolant temperature up to 30 degrees
Show More
Top 10

Motor Power Care Cooling System Flush and Conditioner kit Radiator

Motor Power Care
R110
2.0 x 3.0 x 4.0 Inches
1.0 Pounds

Ratings for Motor Power Care (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
MotorPower Care -

Features

radiator flush and conditioner
cooling system flush conditioner
Show More
Top 11

Gunk TITESEAL C551B Radiator Repair Powder - 2 oz.

Gunk
C551B
1.0 x 1.0 x 1.0 Inches
0.18 Pounds

Ratings for Gunk (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
Hearthshire 105
Gatzies 1,206
alineauto -
Sirr0und 4,204
Craigsparts -

Features

TITESEAL is a local family owned company based out of Charlotte, NC. For more than 75 years, LIQUID WRENCH products, developed by the people who use them, has earned the trust of hard-working tradesment and the active DIYer through consistent, superior performance and a commitment to innovation.TITESEAL
Top 12

Fram SP3781 Liquid Coolant Additive

Fram
SP3781
0.0 x 0.0 x 0.0 Inches
2.0 Pounds

Ratings for Fram (CPR Score)

Seller CPR Rank Amazon Fulfilled Prime Free Shipping
BarMac Automotive -

Top 10 Radiator Conditioners & Protectants - Verified to Buy (Apr. 2024)

Top 10 Radiator Conditioners & Protectants Brands on Amazon

Here is the list of top-rated brands that were evaluated by CherryPicks.

  • AUTOPROFI
  • Design Engineering
  • RMI-25
  • VP Racing Fuels
  • Prestone
  • ATP Automotive
  • Bar's Leaks
  • Cyclo
  • Motor Power Care
  • Gunk

Top 10 Radiator Conditioners & Protectants Sellers: CPR Seller Rank List

CPR sellers rank is based on CherryPicks-AI bestselling ranking system that helps us analyze each seller's sales trends. The List of top seller ranks is our in-house data, essential for our product ranking to help you make the right shopping choice.

Rank Name Yearly Feedbacks Avg. Ratings
🥇 Spreetail 20,224 4.7
🥈 SportingDoc 13,665 4.9
🥉 Hearthshire 12,364 4.8
4 Moofin 7,058 4.8
5 G.P.S. 6,146 4.9
6 Jamlyn-Supply 4,628 4.9
7 Gatzies 2,822 4.6
8 HRP / Power Oil Center 2,704 4.9
9 B and S Supply 2,189 4.6
10 Capital Supply 1,607 4.9
View or download top Radiator Conditioners & Protectants seller & rating report
Spreetail [20224] SportingDoc [13665] Hearthshire [12364] Moofin [7058] G.P.S. [6146] Jamlyn-Supply [4628] Gatzies [2822] HRP / Power Oil Center [2704] B and S Supply [2189] Capital Supply [1607] Spreetail 28% SportingDoc 19% Hearthshire 17% Moofin 10% G.P.S. 8% Jamlyn-Supply 6% Gatzies 4% HRP / Power Oil Center 4% B and S Supply 3% Capital Supply 2%

[Get] Radiator Conditioners & Protectants Deals (✅Exclusively for Prime)

What does "Amazon Fulfilled" Mean?

Amazon Fulfilled refers to products handled by Amazon's logistics, which indicates that the product is stored, packed, and shipped by Amazon from one of its fulfillment centers.

When you order a product that is "Amazon Fulfilled," Amazon takes care of the storage, packing, shipping, and customer service for that product. This often ensures quicker delivery and better customer service compared to products that are not fulfilled by Amazon. It also means that the product is eligible for Amazon's return policy.

What does "Prime" Mean?

"Prime" refers to Amazon Prime Member (Join Amazon Prime Now), which indicates eligibility for Prime benefits. When you see "Prime" next to a product on Amazon, This generally means that if you are  an Amazon Prime member, you can get free two-day shipping on that product, and sometimes even same-day or one-day shipping depending on your location.

Prime members also have access to other benefits, including 2-Day ShippingExclusive Member DealsPrime VideoBuy With PrimeAmazon MusicPrime Gaming, and more.

Shop Prime Radiator Conditioners & Protectants Deals

What does "Free Shipping" Mean?

"Free Shipping" means that you will not be charged additional fees for the shipping of that product. However, unlike "Prime," which usually guarantees fast two-day shipping, "Free Shipping" doesn't necessarily mean fast shipping.

Sometimes there might be a minimum purchase requirement to qualify for free shipping if you are not a Prime member. For Prime members, the "Free Shipping" usually refers to the free two-day shipping that is one of the benefits of the Prime membership.


Why Should You Trust Us?

Now hundreds and thousands of Oils & Fluids supplies are available on Amazon, Picking the right one is not easy, and that may take a lot of your time, Right? and What is the best Radiator Conditioners & Protectants to buy for new April 2024?

CherryPicks’s Methodology for Evaluating Radiator Conditioners & Protectants

We developed the CherryRatings-AI system to identify and score reviews and the CherryPicks-AI ranking system that uses TensorFlow framework to generate the best list, It will help us evaluate Oils & Fluids items that sell on Amazon. The score of items is based on over ten parameters such as analyzing customer review content, product reviewing rating statistics, brand reputation evaluation, comparing product price with features, etc, You can visit How We Rank to learn more in detail.

We collected and analyzed 69 of Radiator Conditioners & Protectants reviews based on our selection criteria. It helped us shortlist the top qualified and rated Radiator Conditioners & Protectants for Oils & Fluids, We found that most customers choose Radiator Conditioners & Protectants with an average price of $41.63, and the top brands are Fram, ATP Automotive, Prestone, Design Engineering, VP Racing Fuels, Bar's Leaks, Gunk, AUTOPROFI, Pro-Blend, Motor Power Care, LTGJJ, Wonder, RMI-25 And Cyclo. 

Then our expert-level editors reviewed all those quality items and selected the top 12 Radiator Conditioners & Protectants for you, We have researched hundreds of sellers and picked the top sellers for Oils & Fluids, including Spreetail, SportingDoc, Hearthshire, Moofin, G.P.S., Jamlyn-Supply, Gatzies, HRP / Power Oil Center, B and S Supply, Capital Supply, Sirr0und And Performance Parts Racing. The AUTOPROFI Radiator Conditioner - Made in German... are available for purchase right now, and The seller of #1 rank product has received honest feedback from 0 consumers with an average rating of 0.0.

We've helped a lot of satisfied users get the right Automotive product based on their needs, and save lots of time for them to pick Radiator Conditioners & Protectants to buy.


Written By Paulo Santos Goncalves

Paulo S. Goncalves is a student of mechanical engineering with hands-on experience in automotive repair — a skill he picked up in his early days. He would be helping you make the best choice regarding automative parts and products here on this site.