Red Line 80204 Water Wetter Review

Antifreezes and Coolants

Red Line 80204 Water Wetter Review

Thanks for taking the time to read our review of the popular Red Line​​​ 80204 Water Wetter. This particular bottle has a 12 ounce capacity.

It is a wetting agent designed to work in cooling systems. Its purpose is to reduce the temperature of the coolant by as much as 30 degrees Fahrenheit.

The purpose of that is that it helps protect from rust and corrosion protection in plain water for racing engines. It simply provides much better heat transfer properties than standard antifreeze.

It will work well with modern aluminum, cast iron, copper, brass and bronze systems.

All our product recommendations are based on our independent research which we conduct online by reading the many reviews we find at online websites. This review contains affiliate links and we may receive a commission for purchases made.

You can read our affiliates page to find out more and also read about how we write our reviews

Who Are Red Line Oil?

Red Line Oil are better known by racers and enthusiasts. They make products that perform and protect. They formed in 1979, as Red Line Synthetic Oil and began creating lubricants for the racing industry.

These days they make more than 100 quality products, including motor oils, gear oils, assembly lubes, fuel additives and our popular Water Wetter cooling additive for the automotive, motorcycle, marine and industrial markets.

They are based in California.

Who Would Buy Red Line Water Wetter?

When we read all of the online buyer reviews it was easy to see that the people who bought this winch used it for a better way to control the heat built up in engines.

Those who buy it tend to keep buying it as they have had a lot of success with this particular product, when compared to other similar products on the market.

Vehicles all generate power by combustion and that process generates a lot of heat. The engine is kept cool in a vehicle by a mixture of water and antifreeze through your engine and radiator to transfer heat away from the engine.

The radiator releases the heat outside through the vents in the radiator into the atmosphere. However as temperature in the engine increases, "hot spots" will form. These spots can cause what are called vapor bubbles.

These small bubbles build up and will reduce the surface area between the water and the engine. The less area there is, then the less area the heat has to transfer from the engine to the water.

In simple terms the water coolant system becomes less effective and less efficient.

This Red Water Wetter is designed to reduce the surface tension of water. That helps a lot in reducing the size of the bubbles, and helps reduce hot spots. It sounds silly to say that it makes water wetter, but the reality is that it does.

As a result it also helps prevent corrosion and rust in your cooling system.

How Buyers Rate Red Line 80204?

This type of water wetter is bought at various online websites. We research those websites and read the reviews that are left by those online buyers.

For this section we look at the ratings given, and then work out an average rating based on all of those reviews. We then score this rating and express it as a percentage with a maximum score of 100%.

  • Anything over 90% is an excellent product
  • Anything between 80-90% is a very good product
  • Anything from 70-79% is a good product but will have some complaints
  • Anything from 60-69% could still be a goof product but there will be more complaints
  • Anything under 60% we would never show as there will be too many complaints
Buyer Satisfaction
  • Overall Buyers gave this water wetter a 90% buyer satisfaction rating
  • 71% of all buyers gave this a full 5 star rating
  • 5% of all buyers gave this wetter a bad rating

What Buyers Say About the Red Line 80204

As with the buyer rating above we also read the online reviews as that gives us a better understanding of what the product is really all about. There is a lot of information to read.

We summarize all of that information and put it together in an easy to read format. We have found that the easiest way to do that in our product reviews is in a simple pros and cons table.


  • 71% of all buyers gave this winch a 5 star rating
  • May regular buyers have been using this product for years and state that it works really well at reducing temperatures
  • Many buyers say this is a must use product especially in diesel engines


  • 5% of all buyers gave this coolant a bad review
  • A few buyers said they used it and it did nothing for their coolant temperature

Red Line 80204 Specification

Some buyers really do like to know the specification of any product that they may be buying. With a product like a winch, we think that is even more important to understand.

That being the case we have put together a full specification just below.

  • This is mixed with water at the rate of one ounce per quart of water, so a 12 ounce bottle of this will do 3 gallons of water
  • It is compatible with all coolants
  • Ideally it should be added to the radiator
  • It needs to be used along with antifreeze
  • Please note that this is NOT designed to fix faulty cooling systems as it is designed to help reduce hot spots and as such make your coolant system more efficient

Red Line 80204 Video Explanation

Here is the water wetter explained on video:

Top 3 Features of the Red Line 80204

Most coolants and antifreeze are pretty standard products. What we like to do in this section is to point out what we believe to be the top three features of this product. We have included those just below.

Feature 1 - Affordable

This is an affordable product when compared to others on the market. One bottle is pretty much all you need to make this work. You need to do this once a year, so not a huge layout for such good results.

Feature 2 - Effective and Easy to Use

According to the many buyers this works like a treat. It not only reduces the temperature of the coolant, but also protects from rust and corrosion in the cooling system.

You simply add it directly to the radiator of your vehicle which will then add it to the mix of water and antifreeze.

Feature 3 - Strong Buyer Satisfaction

Overall 90% buyer satisfaction is a very good rating. What we also think is important is that it has maintained this high rating over a number of years. That proves to us that the product is consistently good, and as such, is made to a high standard.

Our Verdict on the Red Line 80204 Water Wetter

Hopefully you have enough information to be able to make your mind up if this is the right product for you.

The reviews are consistently high and there are very few buyer complaints. That is always a very good thing to see.

We also think it is important to point out that this is not a product that is designed to fix leaking radiators or leaking cooling systems.

This water wetter is about reducing vapor bubbles and hot spots in the water inside your cooling system.


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