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Top rated Coolants for water coolers

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1. EKWB EK-CryoFuel, 1000ml ready-mix - Clear

Ready-to-use transparent coolant for water cooling systems from EKWB. The bottle contains 1000 millilitres of finished mixture from the EK CryoFuel series with bio growth inhibitors and corrosion protection with high material compatibility.

The features of the EK-CryoFuel coolant at a glance:
Compatible with copper, brass, aluminum, stainless steel, acetal (POM), acrylic, rubber (NBR, EPDM, Neoprene)
Incl. bio growth inhibitors
With corrosion protection
90% biodegradable within 10 days 

What our customers think

Pro

  • The colour is awesome
  • Never get deposits
  • No residues in the system

Contra

  • Heavy deposits after just a few months
  • Rather expensive
  • if not at temperature rather milky than clear

2. Alphacool Ultra Pure Water

Through five special filters, including a reverse osmosis filter, the water is completely freed from salts, metals, and germs that are commonly found in tap water. The purification process removes chlorine, odors, heavy metals such as lead, copper, cadmium, and mercury, as well as agricultural chemicals, hormones, antibiotics, pesticides, fungicides, herbicides, pharmaceutical residues, carcinogenic organic chlorinated compounds, radioactive substances, asbestos fibers, tar compounds, nitrites, nitrates, bacteria, viruses, fungal spores, and cysts.

As a result, the water leaves no residues during evaporation and does not form limescale deposits. Furthermore, Ultra Pure Water, due to its low pH value of 6.0 to 7.0, can even absorb deposits (up to a certain extent), ensuring that the cooling system remains permanently clean. 

What our customers think

Pro

  • Clear, pure distilled water without artificially added additives
  • Distilled water
  • Nope.

Contra

  • becomes cloudy
  • not packaged in a protective atmosphere
  • Does not protect against corrosion

3. Aqua Computer Double Protect Ultra

DP Ultra is the result of extensive testing and contains specially coordinated active ingredients that guarantee optimal protection against corrosion and optimal cooling performance.

Manufacturing is carried out under high-quality standards using the highest quality, absolutely pure active ingredients, entirely in Germany.

DP Ultra has been specifically developed for use in PC cooling systems with copper and aluminum components and is only extremely low in electrical conductivity. The active ingredients also reduce bubble formation and optimize heat transfer at surfaces through improved flow behavior of the coolant, resulting in optimal cooling performance in your system. DP Ultra is a clear and nearly odorless solution.

DP Ultra was developed directly by Aqua Computer in collaboration with Dr. Tobias Voigt. Compared to other available ready-made mixtures, DP Ultra achieves very good cooling performance and improves flow behavior due to its ingredients.

DP Ultra is pre-dosed and ready to use. We recommend an annual replacement of the coolant.

Note: Please be aware that the colored Double Protect Ultra ready-made mixtures in the canister may appear visually different than in the tube. Please refer to the second image, which shows the mixture in the tube for comparison. 

4. Corsair Hydro X Series XL5

Corsair Hydro X Series XL5 Performance Coolant brings your custom cooling system's color scheme to life and is available in a wide range of vibrant, translucent colors. The pre-mixed and ready-to-use XL5 Performance Coolant contains corrosion and antibacterial inhibitors that keep your cooling system clean and cool. It is designed to protect fittings and blocks made of copper, brass, and nickel, delivering vivid colors and cool temperatures to your cooling system. 

5. Alphacool Ice Water Crystal Green

With the Alphacool Eiswasser Crystal, the water cooling pioneer Alphacool fulfills the wishes of many modders and enthusiasts: vibrant colors, stunning effects in plexiglass coolers, tubes, and reservoirs, as well as durability and compatibility with the materials used. The Alphacool Eiswasser Crystal series has been tested for over 1.5 years in various applications, both in the Alphacool lab and by external testers and modders, and has been found to be very good and long-lasting.

For those who want to add an extra touch of brightness to their PC, the Alphacool Eiswasser Crystal UV can be used. Its UV reactivity with UV LEDs or cathodes is outstanding.

With the Alphacool Eiswasser, you give your water cooling an optical highlight with excellent cooling performance and durability. 

6. Aqua Computer Double Protect Ultra 5l canister

DP Ultra is the result of extensive testing and contains specially coordinated active ingredients that guarantee optimal protection against corrosion and excellent cooling performance. It is produced under high-quality standards and using the highest quality, completely pure active ingredients, entirely in Germany. DP Ultra has been specifically developed for use in PC cooling systems with copper and aluminum components and is only minimally electrically conductive. The active ingredients also reduce bubble formation and optimize heat transfer at surfaces by improving the flow behavior of the coolant, leading to optimal cooling performance in your system. DP Ultra is a clear and nearly odorless solution. DP Ultra was developed directly by Aqua Computer in collaboration with Dr. Tobias Voigt. Compared to other available ready-to-use mixtures, DP Ultra achieves very good cooling performance and improves flow behavior due to its ingredients. DP Ultra is pre-measured and ready to use. We recommend an annual replacement of the coolant. 

7. Aquatuning AT-Protect

Ready-to-use coolant that can be added directly from the bottle to the cooling system without mixing with water. Specifically developed for closed water cooling systems, it provides effective and long-lasting corrosion protection for PC cooling systems that use different materials (e.g., copper, brass, plastics, seals). The included corrosion inhibitors work effectively and preventively, protecting the system over an extended period.

The dosage is very simple, as AT-Protect can be used undiluted to fill a water cooling system. To maintain the exact dosage, AT-Protect should not be further diluted. AT-Protect is odorless, colorfast, non-flocculating, and glows in its characteristic color when exposed to UV light.

AT-Protect-UV-green does not contain Glysantin or glycol, thus it does not reduce the water's heat absorption. Therefore, it is particularly suitable for high-performance PC water cooling systems.

Warning: Contains ethylene glycol. Keep out of reach of children, rinse immediately with water in case of contact, and seek medical attention.

Note: Since this concentrate contains dyes, it may discolor clothing or other materials upon contact. It should also be noted that dyes may fade over time, which can reduce the intensity of the color. 

What our customers think

Pro

  • Beautiful colour
  • 5 litres at once
  • High quality

8. Aquatuning AT-Protect Crystal Blue

Ready-to-use coolant that can be added directly from the bottle into the cooling system without mixing with water. Specifically developed for closed water cooling systems, it provides effective and long-lasting corrosion protection for PC cooling systems that use different materials (e.g., copper, brass, plastics, seals). The included corrosion inhibitors work effectively and preventively, protecting the system over an extended period.

The dosing is very simple, as AT-Protect can be used undiluted to fill a water cooling system. To maintain the exact dosage, AT-Protect must not be diluted further (e.g., with water). AT-Protect is odorless, colorfast, non-flocculating, and glows in its characteristic color when exposed to UV light (LEDs, cathodes).

AT-Protect-UV-green does not contain Glysantin or glycol, and therefore does not reduce the water's heat absorption. This makes it particularly suitable for high-performance PC water cooling systems.

Warnings: Contains ethylene glycol. Keep out of reach of children, rinse immediately with water in case of contact, and seek medical attention.

Note: Since this concentrate contains dyes, it is possible that it may stain clothing or other materials upon contact. We also want to point out that dyes may fade over time, which can lead to a decrease in color intensity. 

9. EKWB EK CryoFuel Mystic Fog

EK CryoFuel Mystic Fog by EK Water Blocks is a high-quality water additive specifically designed for water cooling systems. This coolant not only provides excellent cooling performance but also boasts remarkable color stability that lasts over time. With a formulation that is 90% biodegradable, EK CryoFuel Mystic Fog represents an environmentally friendly choice. The liquid is compatible with various plastics such as acetal, acrylic, and rubber, and contains bio-growth inhibitors to prevent the growth of microorganisms. These features make the product ideal for enthusiasts and gamers who value performance and sustainability. Using EK CryoFuel Mystic Fog ensures not only efficient cooling but also an appealing aesthetic in your system, as the color particles do not sediment and the fresh coloration is maintained for a long time.

- Long color stability with intense brightness
- Compatible with acetal, acrylic, and rubber
- Contains bio-growth inhibitors
- Corrosion protection for long-lasting performance
- 90% biodegradable within 10 days. 

What our customers think

Pro

  • looks bombastic
  • Packaging was good
  • Fortunately, EK has much better liquids

Contra

  • A little "boring"
  • A little expensive
  • This piece of dirt has destructive potential!

10. Der8auer Delid Die Mate X

The Delid-Die-Mate X by der8auer is an innovative tool specifically designed for the safe and precise removal of the Integrated Heat Spreader (IHS) from CPUs. This product is aimed at tech enthusiasts and overclocking fans who want to maximize the performance of their processors. By allowing users to replace the Thermal Interface Material (TIM), it improves thermal conductivity and optimizes cooling performance. The Delid-Die-Mate X offers user-friendly handling and ensures that the delicate silicon cores of the CPU remain protected during the delidding process. With this tool, users can enhance the efficiency of their water cooling systems and significantly improve the thermal performance of their CPUs. It is an essential aid for anyone looking to unlock the full potential of their hardware.

- Enables safe removal of the IHS from CPUs
- Improved thermal conductivity through TIM replacement
- User-friendly design for precise handling. 

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