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Red Line Water Wetter (liquid)

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Brand: Red Line Synthetic Oil

Red Line Cooling System Water Wetter improves the ability of coolant to wet heat transfer surfaces by 50%. This provides significantly better coolant contact in the cylinder head and can reduce coolant and head temperature by as much as 20° Fahrenheit. Can be used with 100% water in racing but does not protect magnesium from corrosion or alter the freezing point significantly. Use one ounce per quart or one bottle in a cooling system of 12-20 quarts capacity.

Red Line Water Wetter passes the ASTM D2570 Simulated Service Corrosion Test (the most severe test developed for automotive coolants) with a significant margin to spare. This test circulates coolant for 1094 hours at 190°F through a simulated engine block with test samples of metals commonly found in automotive cooling systems. The weight lost due to corrosion is then calculated for each sample. An independent test lab showed that a 3.1% volume concentration of Water Wetter in tap water (not distilled water) protected copper, brass, steel, cast iron, cast aluminum, and 30a solder -- better than the test requirements, and better than the competition!

Corrosion Protection Test Results: Red Line Water Wetter versus the competition View the actual ASTM D2570 test results comparing Water Wetter's corrosion protection to that of a competing product. The tests were performed by an independent laboratory.

Now available in a convenient, pre-mixed 1/2 gallon jug! Red Line Super Cool with Water Wetter (Part No. RL009) mixes just the right amount of Water Wetter with purified, deionized water for optimum results.

Note: Due to import restrictions, we are not able to ship this product to Mexico.

Enter desired order quantities below, then click the "Add selected quantities to cart" button.

Order Qty
Part No.

1699-12 OZ
Condition: New

Red Line Water Wetter (liquid), 12 oz bottle

1 to 11: $9.95

12 to 47: see in cart

48 & up: see in cart

In Stock


by PowerReviews
Red Line Water Wetter (liquid)

(based on 4 reviews)

Ratings Distribution

  • 5 Stars



  • 4 Stars



  • 3 Stars



  • 2 Stars



  • 1 Stars




of respondents would recommend this to a friend.

Reviewed by 4 customers

Displaying reviews 1-4

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A Life Saver for Over 20 Years

By Rick

from Raleigh, NC

Verified Buyer

Comments about Red Line Water Wetter (liquid):

Have been using this product for over 20 years. I would highly recommend it.

Service and delivery comments:

Packaging was great.

  • Was this a gift?:
  • No

Water wetter

By gilpin27

from Black Hawk, Colorado

Verified Buyer

Comments about Red Line Water Wetter (liquid):

Could have bought it cheaper from another site but bundled it with my order for convenience. The best thing about Pegasus is in stock items


Highly recommend this product

By Rob

from Boston, MA

Verified Buyer

Comments about Red Line Water Wetter (liquid):

Red Line Water Wetter is the additive we use in all of our race engines

(2 of 2 customers found this review helpful)



By Crossle45

from Chicago, Il.

Verified Buyer

Comments about Red Line Water Wetter (liquid):

This little bottle of "magic" has resolved all my system water cooling problems for many years.

Displaying reviews 1-4

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