
Top rated Coolant for water coolers
Here's a ranking of the top rated products in this category. To give you a quick overview, we've also added some key information about the products.
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

2. EKWB EK-CryoFuel
EK-CryoFuel is the most chemically stable coolant, providing enthusiasts and gamers with the good level of performance and thermal efficiency with emphasis on color stability. EK-CryoFuel coolant is a pure, non-toxic coolant based on the patent-pending chemical formula that prevents the formation of deposits in the liquid cooling circuit. Users of liquid cooling systems can be assured that the EK-CryoFuel coolant, with its very low viscosity, will not clog or damage water blocks and other parts of the circuit when used with EK-DuraClear or EK-ZMT hoses. EK-CryoFuel also contains synergistic corrosion inhibitors to protect metals commonly found in computer fluid cooling systems.

3. EKWB EK CryoFuel Mystic Fog
EK CryoFuel Mystic Fog by EK Water Blocks is a high-quality coolant additive specifically designed for water cooling systems. This coolant not only provides excellent cooling performance but also offers 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.

4. Alphacool Ultra Pure Water
Water produced especially for Alphacool directly from a high-quality reverse osmosis system. Purified by 5 special filters (one of which is a special reverse osmosis filter), the water is absolutely free of salts, metals and germs, i.e. all those components that are found in normal tap water. The process eliminates chlorine, odours, heavy metals such as lead, copper, cadmium, mercury, etc. Agricultural chemistry, hormones, antibiotics, pesticides, fungicides, herbicides, drug residues, carcinogenic organic chlorine compounds, radioactive substances, asbestos fibres, tar compounds, nitrites, nitrates, bacteria, viruses, fungal spores, cysts. This means that the water leaves no residue whatsoever during evaporation and no limescale deposits are formed. On the contrary: Due to the low PH value of 6.0 - 7.0, Ultra Pure Water even absorbs deposits (up to a certain amount), so that the cooling system remains permanently clean.

5. Aqua Computer Double Protect Ultra
The manufacturer does not compromise on coolant fluids either, ensuring reliable corrosion protection for long-term stable operation with high reliability. This prevents the accumulation of metal in the fluid and, in turn, the thinning of metal components (copper, aluminum, etc.) in the water circuit.

6. Corsair Hydro X Series XL5 Performance Coolant
Corsair Hydro X Series XL5 Performance Coolant brings your custom cooling system’s color scheme to life, available in a wide choice of vibrant translucent colors. Premixed and ready to use right out of the bottle, XL5 Performance Coolant includes anti-corrosion and anti-bacterial inhibitors that keep your custom cooling system running clean and cool. Formulated to protect copper, brass, and nickel fittings and blocks, XL5 Performance Coolant brings vivid color and cool temperatures to your custom cooling system.

Corsair Hydro X Series XL5 Performance Coolant
1000 ml, Ready-mix
7. 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 while adding vibrant colors and cool temperatures to your cooling system.

Corsair Hydro X Series XL5
1000 ml, Ready-mix
8. 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. The 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 longevity.

9. Alphacool Ice water Crystal Red
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. The 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 longevity.
- Permanently usable
- Very good thermal conductivity
- Very low electrical conductivity
- Compatible with most plastics such as PVC, NBR, acetal, plexiglass, and nylon
- Compatible with most metals such as copper, silver, nickel, and brass
- Non-hazardous material (not subject to labeling under CLP regulation)
Due to the intensity of the colors, clothing or other materials that come into contact with the dye may become discolored. Please be careful during application to avoid spills.

Alphacool Ice water Crystal Red
1000 ml, Ready-mix
10. Alphacool Ice water Crystal Blue UV
With the Alphacool Ice Water Crystal, the water cooling pioneer Alphacool fulfils the wishes of many modders and enthusiasts: crisply beautiful colours, great effects in Plexi coolers, hoses and expansion tanks as well as longevity and compatibility with the materials used. The Alphacool Ice Water Crystal series has been tested for more than 1.5 years for all possible applications in the Alphacool laboratory as well as by external testers and modders and has been found to be very good and durable.
If you want to give your PC an extra portion of luminosity, you can use the Alphacool Crystal UV ice water. The UV reactivity with UV LEDs or cathodes is outstanding.
With the Alphacool ice water you give your water cooling an optical highlight with best cooling performance and longevity.
Permanently applicable
Very good thermal conductivity
Very low electrical conductivity
Compatible with most plastics such as PVC, NBR, Acetal, Plexi and Nylon
Compatible with most metals such as copper, silver, nickel and brass
No dangerous goods (not subject to labelling according to CLP Regulation)
Due to the intensity of the colors, clothing or other materials that come into contact with the color may discolor. Please be careful not to spill anything during use.

Alphacool Ice water Crystal Blue UV
1000 ml, Ready-mix