The Latest in
Immersion Cooling
Fluid Innovation

Through our fluid-agnostic strategy, we’re building a diverse portfolio of single-phase immersion cooling fluids with our trusted network to accelerate the widescale adoption of immersion cooling.


Submer’s Fluid Portfolio

By partnering with industry leaders through our fluid validation program, we’re taking things a step further in terms of fluids optimized for specific performance requirements and applications. 

Which fluid fits your project best?

Our experts are on hand to guide you on your immersion cooling journey.

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A Peek Inside Our Portfolio

 Whether it’s optimization, validation, or standardization, the Submer stamp of approval never compromises on sustainability or performance for liquids used in immersion cooling.

  • Thermal Performance

    Submer supported fluids are tested to meet strict performance criteria.

  • Safety

    All our supported fluids are kind to people, hardware and the environment.

  • Compatibility

     All our fluids undergo rigorous compatibility tests with common materials and components.

  • Longevity

    All the fluids in our portfolio are tested to last at least 10 years under standard operating conditions.



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Frequently Asked Questions

Still got questions for us?

  • 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.

  • What does Submer’s fluid validation process consist of?

    Submer’s Fluid Validation Program consists of a series of tests applied to all our approved fluids to ensure they meet the performance, safety, and environmental criteria required by our customers and industry standards. These tests include checks on dielectric properties, fire safety, material compatibility, longevity, and thermal performance, conducted according to IEC, ASTM, and ISO test methods. This comprehensive validation allows Submer to deliver turnkey immersion solutions with your preferred immersion cooling fluid.

  • 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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