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The 10 Best Cooling System Additives to Buy – September 2020 edition

Looking for the best Cooling System Additives?

Discover now our comparison of the best Cooling System Additives. It is never easy to choose from the wide range of offers. On the market, you will find an incalculable number of models, all at different prices. And as you will discover, the best Cooling System Additives are not always the ones at the highest prices! Many criteria are used, and they make the richness and relevance of this comparison.
To help you make the best choice among the hundreds of products available, we have decided to offer you a comparison of the Cooling System Additives in order to find the best quality/price ratio. In this ranking, you will find products listed according to their price, but also their characteristics and the opinions of other customers. Also discover our comparisons by categories. You won’t have to choose your products at random anymore.

No. 1
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. 2
Royal Purple ROY01600 PURPLE ICE SUPER COOLANT, 12 oz, 1 Pack
  • Prevents erosion and electrolysis
  • Compatible with all coolants types
  • Contains lubricants to protect the water pump
  • Fit type: Vehicle Specific
No. 3
Lubegard 96001 Kool-It Supreme Coolant Treatment, 16 oz.
  • Protects all metals from chemical electrolysis
  • Provides unsurpassed cooling system corrosion protection
  • Enhances heat transfer and reduces operating temperatures
  • Prevents deposits and contamination which lead to overheating
  • Only coolant protectant with built-in pH indicator; pH indicator for use in straight water applications
No. 5
EVANS Cooling Systems EC61001 Heavy Duty Waterless Engine Coolant, 128 fl. oz.
  • Specially formulated for use in all heavy duty diesel, CNG, and LNG engines, in both stationary and vehicle applications Especially effective in severe-duty service such as vocational and off-road
  • Ready to use Requires no supplemental coolant additive (SCA) additions Contains no phosphates, silicates, borates, amines, or nitrite
  • Has a high boiling point of 375 Degree F and provides low temperature protection to -40F Will not vaporize, eliminating boilover and after-boil Generates low system pressures, prevents coolant loss, and reduces strain on cooling system components
  • Contains no water, effectively eliminating corrosion, wet-sleeve liner and water pump cavitation erosion Minimizes the potential for corrosion and electrolysis issues, and reduces maintenance costs
  • During installation ensure that all of old water-based coolant and water is removed before installing this product
No. 6
Hy-Per Lube HPC100-3PK High Performance Super Coolant - 16 oz, (Pack of 3)
  • Reduces Engine Cylinder Heat Temperatures
  • Allows Safe Advancement of Ignition Timing Resulting in More Horsepower
  • Prevents Overheating in High Performance and High Load Engines
  • Complete Protection from Rust, Corrosion and Electrolysis
  • Compatible With All Types of Antifreeze, does not contain ethylene glycol
SaleNo. 7
Bar's Leaks Cooling System Repair - 16.9 oz
  • 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
No. 8
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. 9
SUBARU Genuine Cooling System Conditioner Coolant Head Gasket 12 Pack Case SOA635071
  • Used only with cars with green coolant .
  • Subaru Genuine Coolant Cond. SOA635071 X12 ( Case discount)
  • 1993-2008 Impreza Wrx STI
  • 1998-2008 Forester
  • 1990-2008 LEGACY and Outback

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Last update on 2020-09-29 at 12:33 / Affiliate links / Images from Amazon Product Advertising API