Essential Guide of Cooling System Additives – October 2021 Edition

Looking to find the best Cooling System Additives?

We researched 21 Cooling System Additives, tested 6, and we have done 16 hours of research. The best Cooling System Additives doesn’t have to be complicated to be great. Our first pick is exactly that. No more, no less. It also costs less than any other products we tested.

The best

No. 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

Intro

Here’s your guide to choosing the best Cooling System Additives. As there is a great number of models with varying prices, you may find it difficult to figure out which one is right for you. For this reason, we decided to make a top 10 of the Cooling System Additives of different brands and prices based on the best value for money. This ranking was created to help you find the best Cooling System Additives depending on your needs and budgets. Our selection criteria are provided to give you a complete picture of the items offered. Get ready to find the Cooling System Additives that’s right for you!

Our picks

No. 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
No. 2
Red Line Water Wetter 12 oz (Pack of 2)
  • Convenient, pre-mixed coolant for motorcycles, ATVs, karts, etc.-pour and go
  • Blended with purified, deionized water and proper WaterWetter percentage
  • Reduces rust, corrosion and electrolysis, cleans and lubricates water pump seals
  • Compatible with all antifreeze and coolant
  • Satisfies ASTM D2570 and ASTM D1384 corrosion tests for glycol-based antifreezes
No. 3
Hayden Automotive 526 Remote Transmission Oil Cooling System
  • Plate and fin design
  • Self contained cooler/fan combination for remote mounting
  • Ultra compact design
  • Advanced stator fan design to evenly distribute cooling
  • Can be operated with thermostatic or manual controls

Why you should trust us

This guide represents more than 10 years of experience in researching, testing, and writing about many subject. Our people are experts in all of their fields.
We alors spent 16 hours reading any article we could find on the internet and all the customer reviews at various retailer sites such as those of Amazon, Home Depot or Wallmart. We found many website that was a valuable resource with involved buying guides and detailed Cooling System Additives information.
As for me, I’m very familiar with the Cooling System Additives since I got it from 2 years.

Top 10

No. 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
No. 2
Red Line Water Wetter 12 oz (Pack of 2)
  • Convenient, pre-mixed coolant for motorcycles, ATVs, karts, etc.-pour and go
  • Blended with purified, deionized water and proper WaterWetter percentage
  • Reduces rust, corrosion and electrolysis, cleans and lubricates water pump seals
  • Compatible with all antifreeze and coolant
  • Satisfies ASTM D2570 and ASTM D1384 corrosion tests for glycol-based antifreezes
No. 3
Hayden Automotive 526 Remote Transmission Oil Cooling System
  • Plate and fin design
  • Self contained cooler/fan combination for remote mounting
  • Ultra compact design
  • Advanced stator fan design to evenly distribute cooling
  • Can be operated with thermostatic or manual controls
SaleNo. 4
Genuine Ford Fluid VC-8 Diesel Cooling System Additive - 16 oz.
  • Replaces fluorescent green-colored V119 premium antifreeze/coolant meeting Ford specification ESE-M97B44-A
  • Replaces yellow-colored Motorcraft gold antifreeze/coolant meeting Ford specification WSS-M97B51-A1
  • Designed to replace additives depleted between coolant change-outs
  • Now dyed yellow to eliminate engine coolant color change when mixing
  • Genuine OEM
No. 7
Red Line (80204) Water Wetter - Coolant Additives - 12 Oz Bottle
1,893 Reviews
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. Larger cooling systems should use 2 bottles; Small cooling systems should use 1oz per quart
  • Why red line - Established in 1979, red line products perform & protect better than any on the market. No compromises
SaleNo. 8
Bar's Leaks Cooling System Repair , grey , - 16.9 oz -1150
  • Stops Cooling System Leaks
  • Compatible with all brands of anti-freeze including conventional green or blue and extended life red/orange or yellow (OAT/HOAT) coolant
  • Premium Carbon Fiber Formulation For Extended Protection
  • Country Of Manufacture: United States
No. 10
Motorcraft VC8 Diesel engine coolant additive - 1 Pint(473 ml)
  • In all heavy-duty, diesel engine cooling systems equipped with green-colored Motorcraft Premium Engine Coolant meeting Ford Specification ESE-M97B44-A
  • In all heavy-duty, diesel engine cooling systems equipped with yellow-colored Motorcraft Premium Gold Engine Coolant meeting Ford Specification WSS-M97B51-A1
  • Designed to replace additives depleted between coolant change-outs
  • Now dyed yellow to eliminate engine coolant color change when mixing

How we tested

We search all the field to find the best Cooling System Additives and all the type for it and get the best alternatives, priced decently, and easy to use. After that we tested all the main parameters we use : These things can separate the great Cooling System Additives from the good.

  • Easy To use
  • Options
  • Quality
  • Longevity

How we picked

We search for all the field to find the best Cooling System Additives and all the type for it and get the best alternatives, priced decently, and easy to use.
The main parameters we use : These things can separate the bad Cooling System Additives from the good.

  • Price
  • Easy To use
  • Customer reviews
  • Quality
  • Longevity
  • Dimensions

Current Offers

SaleNo. 1
Genuine Ford Fluid VC-8 Diesel Cooling System Additive - 16 oz.
  • Replaces fluorescent green-colored V119 premium antifreeze/coolant meeting Ford specification ESE-M97B44-A
  • Replaces yellow-colored Motorcraft gold antifreeze/coolant meeting Ford specification WSS-M97B51-A1
  • Designed to replace additives depleted between coolant change-outs
  • Now dyed yellow to eliminate engine coolant color change when mixing
  • Genuine OEM
SaleNo. 2
Bar's Leaks Cooling System Repair , grey , - 16.9 oz -1150
  • Stops Cooling System Leaks
  • Compatible with all brands of anti-freeze including conventional green or blue and extended life red/orange or yellow (OAT/HOAT) coolant
  • Premium Carbon Fiber Formulation For Extended Protection
  • Country Of Manufacture: United States
SaleNo. 3
Bar's Leaks J-100 DiFM Cooling System Treatment - 5 Grams
  • Seals internal, external and coolant to oil leaks
  • Stops radiator tank seal leaks
  • Inhibits the formation of rust and scale
  • Helps control electrolysis and helps neutralize pH imbalance
  • Lubricates water pump seal
SaleNo. 4
Mishimoto - MMRALC Liquid Chill Radiator Coolant Additive
129 Reviews
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
SaleNo. 5
K-Seal ST5501 Multi Purpose One Step Permanent Coolant Leak Repair
2,936 Reviews
K-Seal ST5501 Multi Purpose One Step Permanent Coolant Leak Repair
  • Permanent coolant leak repair - Just shake, pour and go
  • Mixes with all antifreeze
  • No draining or flushing
  • Fixes cracks and leaks in radiator, head gasket, freeze plugs, cylinder heads, heater core, water pump casing and engine blocks
  • If product did not seal head gasket leak, the system might be Over-pressurized, which causes back pressure and doesn't allow the product to reach the problem area, on this page below under Technical Specification is a PDF Guide with instructions to follow to complete the repair successfully

Conclusion

This guide is here to support you in your choice of Cooling System Additives and is regularly updated so that you can make an informed selection. Nowadays, it’s not that easy to know about each and every product that’s on the market. So we hope that this comparison was able to help you with choosing the best Cooling System Additives according to your criteria. Your comments are most welcome and they will help us improve the ranking.

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Last update on 2021-10-20 at 11:15 / Affiliate links / Images from Amazon Product Advertising API

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