Best Radiator Coolant for Hot Weather

If you want to keep your engine running smoothly in the warmer months, you’ll need to use the right coolant. In this article we will take a close look at several amazing products. These reviews will help you to find the great choice.

Our top choice is the Zerex G05 Antifreeze, which features a pre-mixed formula that makes it ready to use. It also contains nitrite, which helps prevent cavitation of diesel engine cylinders. This option offers reliable performance that you can rely on every single day.

Before you decide on a certain choice to use with your vehicle, we encourage you to learn about the following products.

How We Dig Out The Top Radiator Coolant

As we put together our list , there were certain things we took into consideration. We first looked at the boiling and freezing points of each product. This will let you know just how reliable each one truly is.

We also looked at the ability of each to prevent corrosion, which is incredibly important. If you want to keep the internal components of your vehicle in excellent condition, this is an absolute necessity.

It should offer protection for both metal and plastic parts. This type of formula will virtually guarantee smooth performance on a consistent basis over the long term.

Top 5 Radiator Coolants for Humid Weather in 2023:

PEAK PXAB53 Antifreeze Coolant

Engine Ice TYDS008 High Performance Coolant

Zerex G05 Antifreeze/Coolant

EVANS Cooling Systems EC53001 Waterless Engine Coolant

ACDelco 10-5027 Dex-Cool Engine Coolant

PEAK PXAB53 Antifreeze Coolant

The PEAK PXAB53 Antifreeze Coolant is specifically formulated to protect your vehicle over the long term. It features unique inhibitors that prevent issues with corrosion, which helps you get years of reliable performance.

This option is compatible with American, European, and Asian vehicles of all different makes and models. It has a boiling point of 224 degrees and a freezing point of -34 degrees, and a flashpoint of 241 degrees Fahrenheit. You can therefore expect it to perform well through even the most extreme temperatures all year round.

One of the reasons that we put the PEAK PXAB53 on our list is that it comes pre-diluted. This means that you won’t have to deal with adding any water yourself. You can start using it in your vehicle right away.

You’ll find that this antifreeze coolant is among the most versatile options available on the market right now. It works well with trucks, SUVs, sedans, and other automobiles.

Each container of this gives you 1 gallon of liquid, so you’ll definitely get your money’s worth. It has a 50/50 antifreeze formula that is incredibly effective at preventing engine overheating. This in turn will help you avoid mechanical failures and other problems that can quickly become expensive to have repaired.

If you are searching for a product that will meet all of your needs, this one is definitely worth considering. It offers consistently dependable performance, unlike so many other products on the market.


  • Comes pre-diluted for maximum convenience
  • Works with all different make and model vehicles from all countries
  • Great deal for a 1-gallon container
  • High boiling and freezing points guarantee reliable performance
  • Formulated to help extend overall engine life significantly


  • Some customers say that it came with a broken seal under cap


Engine Ice TYDS008 High Performance Coolant

The Engine Ice TYDS008 High Performance has a biodegradable formula with no phosphate or toxic chemicals. This makes it environmentally-friendly and completely safe for your vehicle.

You can expect a temperature reduction of 10 to -20 degrees Fahrenheit. It has a boiling point of 256 degrees and a freezing point of -26 degrees Fahrenheit. This makes it ideal for a wide range of vehicles. You can use it in pickup trucks, sedans, SUVs, ATVs, and even motorcycles.

This is particularly beneficial for racing, as it meets all ASRA and CCS standards. You’ll be able to use it on any track in the world without any issues whatsoever.

We also really like the fact that this option comes pre-diluted with deionized water. You won’t have to worry about doing any guesswork to dilute it, which is a huge convenience.

One of the reasons we chose the Engine Ice TYDS008 for our list is its consistent performance. You can trust it to keep your vehicle running cool on even the hottest days of the year. It will help keep your engine running strong throughout the entire year.

The propylene glycol in this choice helps prevent problems with your pump gasket as well as seal. It will keep working perfectly even under the most intense, high-load conditions. You can count on it to reduce the temperature of your engine significantly more than most other products available on the market today.


  • Uses propylene glycol to prevent issues with pump gasket
  • Lowers temperature more than most other brands
  • Has an impressively high boiling point
  • Biodegradable eco-friendly formula with no toxins whatsoever
  • Comes pre-diluted with deionized water to save you time
  • Perfect for racing (does not violate any rules or regulations)


  • A few customers say that the price is a bit too high


Zerex G05 Antifreeze/Coolant

The Zerex G05 Antifreeze works equally well with vehicles that have diesel and gasoline engines. It has a low silicate formula with a decreased pH for optimal performance. There are also no phosphates in this product, making it completely safe for your vehicle.

This product will help protect the cylinder liners in diesel engine vehicles to prevent cavitation. It also has certain additives that protect against deposit accumulation from hard water as well as limescale. This ultimately extends the life of your vehicle and keeps your engine running smoothly on a consistent basis.

One of the reasons we included the Zerex G05 on our list is its defoamer system. This innovative formula prevents damage to hoses and all plastic components inside of your vehicle. You can therefore trust that it will work well without causing any problems whatsoever.

We also have to mention that this option is very effective at preventing the formation of rust. The less corrosion that forms inside of your vehicle, the longer it is likely to last. It features an organic inhibitor that combats rust effectively without the use of any toxic or corrosive chemicals.

The virgin ethylene glycol that this option uses gives you extremely high boilover and freezing points. You can therefore trust that it will always give you reliable performance in any weather conditions.


  • Features organic inhibitor to prevent formation of rust
  • Compatible with a wide range of vehicles
  • Defoamer system prevents damage to plastic components
  • High freezing and boiling points for consistently reliable performance
  • Protects diesel engines by preventing cavitation


  • Some customers say that the dilution is slightly off


EVANS Cooling Systems EC53001 Waterless Engine Coolant

The EVANS Cooling Systems EC53001 features a waterless formula that works with all different vehicles. It can be used with both modern and contemporary cars and trucks. It doesn’t matter which type of gasoline you use either. Whether it is light duty diesel or modern gasoline, this product will work perfectly on a consistent basis.

One of the most impressive things about this choice is its 375-degree boiling point. It is formulated to keep working perfectly through even the hottest temperatures. This virtually eliminates the possibility of boilover, making it worth considering.

The incredibly high boilover point means that you won’t have to worry about pre-ignition or engine knock. These are common problems that can arise from extreme heat, and they can do serious damage to your vehicle.

You’ll find that because it doesn’t contain any water, this option is very effective at preventing corrosion. It will also protect against cavitation of the water pump.

Another reason that we put this product on our best list is its uncanny ability to reduce vapor pressure. This ultimately helps prevent serious damage to the internal components of your vehicle’s cooling system. You won’t have to worry about vapor pressure building up and causing excess strain.

If you want to maintain smooth and perfect performance with your engine, this choice has a lot to offer. It will allow you to keep it working at peak horsepower all the time.


  • Works with all different types of vehicles and gasoline
  • Reduces vapor pressure to prevent damage to the cooling system
  • Specifically formulated to prevent corrosion
  • Virtually eliminates the possibility of boilover
  • Waterless formula protects water pump from cavitation
  • Helps maintain engine horsepower as well as fuel efficiency


  • Some customers say that it didn’t prevent overheating with their classic cars


ACDelco 10-5027 Dex-Cool Engine Coolant

The ACDelco 10-5027 Dex-Cool Engine Coolant is formulated for a smooth and long-running engine life. It can keep working up to 150,000 miles.

We really like the anti-corrosion formula of this product. It is designed to protect steel, cast iron, copper, and brass components. This means that you won’t have to worry about the inside of your vehicle becoming rusted out. You can also expect an impressive degree of protection for aluminum parts in your vehicle.

One of the reasons we chose the ACDelco 10-5027 for our list is its non-silica formula. This really helps with preserving the overall functionality of your water pump. You’ll be able to go for longer periods of time before having to replace this part, which will save you money.

You can store this product on the shelf for up to eight years. It is fully compatible with all traditional cooling systems that are used in modern and semi-recent vehicles going back to 1994.

If you have a GM vehicle that you want to protect and preserve as a whole, this coolant is an excellent choice. It will keep your engine running smoothly over the years with minimal issues.

The sheer versatility of this option makes it a viable option for just about everyone. It has a 5/50 pre-mixed formula, so there is no need for manual dilution. You can simply put it in your vehicle without having to do any extra work.


  • Has a shelf life of nearly a decade
  • Offers years of anti-corrosion protection for many different components
  • Formulated to protect the water pump for extended life
  • Can be used with a vast majority of traditional cooling systems
  • Pre-mixed formula doesn’t require any dilution (ready to use)


  • Doesn’t contain any nitrite


Radiator Coolant for Hot Weather Buying Guide

Best Radiator Coolant for Hot Weather

When you are looking for the best radiator fluid for hot weather, there are a few things to keep in mind. You’ll find that the following criteria will help you narrow down your options considerably.



There are certain ingredients that you’ll need to look for before selecting the choice. A lot of modern products contain 50 percent water. There are, however, waterless products that can protect against water pump cavitation.

You’ll quickly discover that some of these products also use ethylene glycol, which keeps the liquid from freezing when exposed to extremely low temperatures. It will also prevent evaporation during very warm weather.

You should also look for such options that use propylene glycol, which offers incredibly efficient overall heat transfer. Some people prefer one that uses this instead of ethylene glycol. This is mostly due to its superior viscosity. It is also completely non-toxic and won’t cause bodily harm if accidentally ingested.

Fuel Compatibility


As you seek out the best, you’ll need to make a point of considering the fuel you use. You’ll find that many of these products are compatible with many different types of fuel, including diesel.

The very best tends to have a versatile formula that works well with just about any vehicle. You will, however, need to think about the fuel you put in your automobile before making a final decision.

Rust Protection


You also need to make sure that you select the one that will protect the internal components of your vehicle. It will prevent the formation of rust on your water pump and other parts.

Many modern products contain certain inhibitors that do a great job of combating corrosion. This will give you more years of use out of your vehicle, which is always a good thing.

Some products use silicates to prevent corrosion, while others use phosphates. The fact is that there isn’t a certain inhibitor that is better than all of the others. Vehicles that are manufactured in Asia have a reputation for inferior heat transfer, which is why they don’t have prodyct that uses silicates.

In Europe, a vast majority of products contains phosphates that combat various minerals that are found in hard water. This does a great job of preventing damage to a variety of internal vehicle components.

Pre-Mixed vs. Unmixed


When you are shopping around for the greatest choice, you’ll need to consider the various types. Some coolants come pre-mixed, while others do not.

A pre-diluted coolant will help you save some time and effort, but this is not always the best option. Many people prefer to add the water themselves. This ultimately comes down to a matter of personal preference.

Boiling and Freezing Points


We highly recommend that you look at the boiling and freezing points for each coolant product you come across. The coolant for hot weather will have a boilover point of at least 256 degrees Fahrenheit. The higher this number is, the less likely the coolant will be to fail you.

If you live in an area that gets very hot in the summer months, it is important to choose the right coolant. It should have a high boiling point so as to ensure reliable performance at all times. Your coolant also needs to have a fairly low freezing point of at least -26 degrees Fahrenheit.



Even the color of the coolant you use in your vehicle will be important. This will be a reflection of the ingredients that are used. For example, coolant that has a green color uses silicates as well as phosphates to prevent rust.

Orange-colored coolants use organic ingredients to combat corrosion. Keep in mind that these coolant products tend to last longer, which will ultimately help you save money.



In order to find the best option, you’ll need to look closely at each one’s formula. It is important to choose one with a high boiling point. This will ensure reliable performance in extreme temperatures. The coolant you choose should also be formulated to prevent corrosion. Feel free to comment down below so we know what you think about our list.

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