Redline WaterWetter, 12 oz.
Redline WaterWetter, 12 oz.
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Red Line Synthetic Oil

Redline WaterWetter, 12 oz.

Key item features

  • UNIQUE AGENT - for cooling systems that doubles the wetting ability of water
  • RUST AND CORROSION PROTECTION - allows for use of straight water in racing or reduced antifreeze levels in warm climates
  • DIRECTIONS FOR USE - one bottle for most passenger cars and light trucks, treats 3 to 5 gallons or 13.2 to 15.9 liters, vehicles with larger cooling systems should use two bottles, small cooling systems should use 1oz (3 to 4 capfuls) per quart
  • POPULAR FOR USE IN - new or used antifreeze (including DEX-COOL and long-life versions) to improve the heat transfer of ethylene and propylene glycol systems, satisfies ASTM D2570 and ASTM D1384 corrosion tests for glycol-based antifreezes
  • WHY RED LINE - Established in 1979, Red Line Products perform & protect better than any on the market. No compromises
Current price is $15.99
Price when purchased online
  • Free shipping
  • Free 30-day returns

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Arrives by Sat, May 30
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Sold and shipped by R/A Hoerr Incorporated
4.503411675511751 stars out of 5, based on 1319 seller reviews(4.5)
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$22.99
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Shipping, arrives by Fri, May 29 to Columbus, 43215
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Customer ratings & reviews

4.7 out of 5 stars
stars71 ratings56 reviews
How item rating is calculated
  1. 5 stars79% (56)
  2. 4 stars10% (7)
  3. 3 stars8% (6)
  4. 2 stars0% (0)
  5. 1 star3% (2)

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Showing 1-3 of 56 reviews

Apr 12, 2026
William
Sold and shipped byR/A Hoerr Incorporated
5 out of 5 stars review

Verified Purchase

My humble opinion

This stuff is amazing. I did not know that if you use it with straight distilled water, you get maximum cooling effect which antifreeze does not provide protection against heat, but remember you will need to change your radiator water once a year to ensure corrosion protection, although this product has corrosion in inhibitors.

Incentivized Review
Helpful?6SQMAQFYWO0Y49712943
Aug 31, 2025
WalmartCustomer
Sold and shipped byR/A Hoerr Incorporated
5 out of 5 stars review

Verified Purchase

Great coolant option for track day

My son needed this for a motorcycle track day that you had to remove the standard coolant. Ran super well and simple exchange of water coolant and the Redline WaterWetter. He said it helped with performance and no issue with how the bike ran. Will order more for the next track run later this fa..

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Helpful?6SQMAQFYWO0Y49712943
Nov 18, 2023
Rswoodys
Sold byAdvance Auto Parts
5 out of 5 stars review

Verified Purchase

Redline Water Wetter - Coolant

I added 3 cap fulls to 500ML of water it seems to work well, I used it in a radiator of a GX 4 high pressure air compressor 45000 psi the motor will get super hot without radiator cooling with water and the Redline Water Wetter seems to have decreased temperature about 25 to 30 degrees Fahrenheit

Helpful?6SQMAQFYWO0Y49712943