Tailor-Made for
Immersion Cooling 

The SmartCoolant is a dielectric, non-toxic immersion cooling fluid that guarantees enhanced performance and operations. 



SmartCoolant’s Signature Qualities

SmartCoolant is an immersion cooling fluid that ticks all the boxes for a sustainable, high performance liquid.

High Performance

Optimized for low viscosity, high thermal capacity, and high thermal conductivity, our SmartCoolant provides superior cooling performance. 

Safety & Easy Handling

SmartCoolant is made from food-grade components and certified by NSF International as an HT1 food-grade fluid, ensuring safety for human operators. 


Electrically resistant and fully compatible with IT hardware, SmartCoolant protects against short circuits and corrosion and  significantly reduces fire risks due to its high flash point.


Synthetically created to avoid impurities, the SmartCoolant's long-term stability minimizes the need for frequent fluid changes and reduces the risk of unexpected fluctuations.


SmartCoolant is certified as readily biodegradable according to OECD 301 guidelines. Unlike many market alternatives, it breaks down into simpler molecules, preventing long-lasting environmental problems.


SmartCoolant Tech Specs

Discover the physical, chemical, electrical, and environmental properties of our coolant specially crafted for performance and sustainability. 

  • Synthetic

    Fluid type

  • 233 ºC

    Fire point

  • 796 Kg/m3

    Density @20 °C

  • ≤20 mg/kg

    Water content

  • 0.14 W/m·K

    Thermal conductivity @40 °C 

  • 2.26 kJ/kg·K

    Specific heat @40 °C 

  • ≥50 kV

    Breakdown voltage 

  • Readily Biodegradable

    Biodegradability (28 days) 

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Frequently Asked Questions

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  • Is single-phase immersion cooling fluid toxic?

    Submer’s validated fluids are non-toxic, synthetic fluids designed for immersion cooling. Some handling and operation guidelines must be taken into consideration, which are detailed in the safety data sheets.

  • What do I need to be aware of regarding handling immersion cooling fluid?

    For handling, wear the indicated PPEs and follow the guidelines for the safest operation.

    According to your local regulations, spill containments methods for the stored fluid may be required, both to prevent the fluid from accidentally reaching the drainage system and to ensure safe operation.

    Although single-phase immersion cooling fluid is classified as nonflammable and the existing fire suppresion methods are sufficient, an assessment to account for the added load should be run. According to your local regulations and always under a competent entity supervision, other actions might be required.

  • What are the material compatibility considerations for servers with immersion cooling?

    The material compatibility of certain materials must be taken into account, such as rubber and plastics, Thermal Interface Materials (TIM), adhesives, and ink. There are readily available alternatives for all the materials that are not fully compatible – learn more here.

  • Can I buy SmartCoolant separately from Submer pods?

    SmartCoolant cannot be bought separately from Submer pods. Hardware and fluid must go hand in hand with each other to ensure performance, safety and environmental criteria are met.

    Running tests under Submer’s Fluid Validation Program ensures the required quality and compliance levels are met, therefore buying the fluid separately is not possible.

  • Is SmartCoolant flammable?

    The SmartCoolant is inherently non-flammable. The fire point of the fluid is 174 °C as measured by ASTM D92-18 Pensky-Martens open cup method (equivalent to ISO 2592). The flash point, i.e. the temperature at which vapors can ignite but not stay alight, is 159 °C.

    As a hydrocarbon fluid with a fire point of 174 °C, the US NFPA classifies SmartCoolant flammability as 1 on a scale of 0 to 4. This puts the SmartCoolant in the same flammability class as materials like wood and plastic, and less flammable than paper, cardboard, and packing foam (NFPA rating = 2 or higher).

    For the combustion of the fluid to occur, three conditions must be met: (1) the entire body of fluid must reach 174°C, (2) there must be an ignition source (e.g., a spark or open flame), and (3) sufficient oxygen must be present. It is important to note that the simultaneous occurrence of these three conditions is very unlikely.

    In the rare event of a fire, industry standard passive and active fire protection systems are sufficient.

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