BestSolv® Engineered Fluids for Heat Transfer and Thermal Management
For manufacturers of semiconductors, maintaining stable process temperatures is critical to product yield and quality. As legacy electronic liquids are phased out, many engineers are actively evaluating a proven Fluorinert alternative that delivers equivalent dielectric performance and thermal stability. In data centers, removing excess heat through immersion cooling dramatically improves efficiency and reduces energy costs. In these environments, selecting a qualified Fluorinert replacement helps maintain uptime, efficiency, and electrical safety without redesigning cooling architectures. With a full range of dielectric fluids, BestSolv® enables engineers to match fluid properties to the exact thermal and electrical requirements of each system.
BestSolv® heat transfer fluids are fluorinated electronic liquids that are safe for direct contact with live electronics and offer a low-maintenance, residue-free alternative to water, glycol, or oil-based cooling systems.
Whether used in cold-plate cooling for semiconductors, immersion cooling for data centers, spray cooling for avionics, or thermal testing for electronic components, BestSolv® thermal management fluids provide efficient heat removal while protecting sensitive circuitry. In high-uptime environments, systems using BestSolv® in reservoirs and recirculation loops can also extend maintenance intervals and improve overall reliability.
BestSolv® Engineered Fluids deliver exceptional cooling performance across a wide operating temperature range—without compromise to worker safety or environmental responsibility. Designed as drop-in solutions, BestSolv® fluids are widely adopted as a reliable Fluorinert substitute for thermal management and dielectric cooling applications. Designed as drop-in replacements for 3M™ Novec™ and Fluorinert™ fluids, BestSolv® products provide the same proven performance with zero ozone depletion potential (ODP), excellent material compatibility, and options that support lower global warming impact.
From supercomputers and semiconductor tools to aerospace and defense electronics, BestSolv® heat transfer fluids deliver both thermal stability and electrical insulation, supporting the performance, safety, and environmental goals of advanced manufacturers worldwide.
BestSolv® Engineered Fluids for Advanced Thermal Management
BestSolv® Engineered Fluids redefine thermal management by giving engineers precise control over heat in next-generation electronic and power systems. Designed for high-efficiency cooling, these non-conductive, non-flammable liquids maintain stable performance under continuous thermal stress while minimizing maintenance and contamination risk. Their versatility allows seamless integration into diverse heat-transfer designs—from immersion cooling to direct contact applications—delivering consistent results across evolving technologies.
Built on decades of industry experience, BestSolv® fluids enable efficient, low-maintenance cooling for systems such as supercomputers, semiconductor tools, power electronics, and aerospace equipment. Each formulation combines high purity with zero ozone depletion potential (ODP), ensuring both performance and sustainability.
With boiling points ranging from approximately 49 °C to 165 °C, the BestSolv® product family gives engineers flexibility to optimize for a wide range of applications. Whether used for immersion cooling, heat transfer, or dielectric testing, these fluids maintain stable performance across wide operating temperature ranges.
For applications demanding maximum electrical insulation and crash-safe operation—such as battery cooling, aerospace, or high-voltage systems—BestSolv® fluids provide an inherently non-flammable and residue-free solution that protects equipment and personnel alike.
BestSolv® Thermal Management / Heat Transfer Fluids
Together, the BestSolv® heat transfer fluids cover the full spectrum of modern thermal management needs, delivering performance, safety, and sustainability without compromise.
BestSolv® Thermal Management Fluids – Operating Range and Boiling Points
The BestSolv® family of heat transfer and immersion cooling fluids delivers dependable, drop-in performance across a broad range of applications. Each fluid is optimized for specific operating conditions—offering precise temperature control, high dielectric strength, and low environmental impact.
| Product | Chemistry Type | Boiling Point (°C) | Typical Operating Range (°C) |
| BestSolv® Zulu | Fluorinated ketone (FK-5-1-12) | 49 | –75 to 40 |
| BestSolv® 7100 | Hydrofluoroether (HFE) | 61 | –105 to 50 |
| BestSolv® 7200 | Hydrofluoroether (HFE) | 76 | –105 to 65 |
| BestSolv® 7300 | Hydrofluoroether (HFE) | 98 | –30 to 85 |
| BestSolv® 3283 | Perfluorocarbon (PFC) | 128 | -55 to 100 |
| BestSolv® 40 | Perfluorocarbon (PFC) | 165 | -45 to 155 |
Selecting a Thermal Management Fluid
When selecting a thermal management fluid, it’s critical to evaluate key performance factors to ensure long-term efficiency and system reliability:
When evaluating a thermal management fluid, consider:
- Operating Temperature Range: Choose a fluid that aligns with your required optimum temperature range, both minimum and maximum process temperatures. This is the primary consideration when selecting a BestSolv® fluid. As long as the selected thermal management fluid meets your required operating temperature range, it doesn’t need to match your previous fluid exactly.
- For systems transitioning away from discontinued chemistries, a well-matched Fluorinert alternative ensures performance continuity while expanding long-term sourcing flexibility.
- Material Compatibility: BestSolv® fluids are designed to be compatible with the most common materials used in thermal management systems.
- Viscosity and Flow Characteristics: Our fluids maintain optimal viscosity across wide temperature ranges, ensuring efficient heat transfer and consistent flow performance even in extreme conditions.
- Thermal Stability & Safety: Every BestSolv® fluid is engineered for high thermal stability and non-flammable operation, delivering safe, dependable performance under demanding thermal loads.
By selecting the BestSolv® fluid that fits your application’s thermal profile, you can achieve optimal performance, longevity, and peace of mind—without being tied to a single legacy chemistry.
Benefits of BestSolv® Engineered Fluids for Thermal Management
BestSolv® Engineered Fluids bring together advanced chemistry and trusted reliability for today’s most demanding cooling and dielectric applications. Each formulation delivers stable, non-flammable performance with high dielectric strength, chemical inertness, and environmental responsibility — ensuring your systems stay efficient, safe, and compliant.
As a modern Fluorinert replacement, BestSolv® fluids provide stable thermal performance, strong dielectric properties, and simplified compliance for advanced electronics cooling.
These specialized electronic liquids are electrically non-conductive and residue-free, making them ideal for direct-contact and immersion cooling where precision and safety are critical. The fluorinated liquid will not damage electronic equipment or integrated circuits in the event of a leak or other failure. Their low viscosity minimizes pumping power in closed-loop chillers, while broad pour-point ranges keep systems running smoothly even at sub-zero temperatures.
Every BestSolv® fluid is engineered to provide:
- Long-term thermal stability for consistent performance.
- Zero ozone depletion potential (ODP).
- Non-corrosive safety and excellent material compatibility across metals, plastics, and elastomers.
- Worker-safe handling with low toxicity and no special containment requirements.
From semiconductor fabrication and data centers to aerospace electronics and power conversion systems, whether used for immersion cooling, heat transfer, or dielectric testing, BestSolv® fluids serve as an effective Fluorinert substitute across a wide range of thermal management systems. BestSolv® fluids deliver the performance, safety, and sustainability modern operations demand.
Performance Comparison of BestSolv® Thermal Management Fluids
| Performance Attribute | BestSolv® HFE Fluids (7100 • 7200 • 7300) | BestSolv® PFC Fluids (3283 • 40) | BestSolv® Fluorinated Ketone Fluid (Zulu) |
| Chemistry Type | Hydrofluoroether (HFE) | Perfluorocarbon (PFC) | Fluorinated Ketone (99.99%) |
| Dielectric Properties | Excellent — suitable for direct-contact cooling | Excellent — superior insulation margin | Excellent — safe for contact with electronics |
| Boiling Point Range | Moderate (61 °C – 98 °C) | High (128 °C – 165 °C) | Low (49 °C) |
| Viscosity | Low — efficient fluid flow | Moderate — optimized for high-power systems | Low — efficient fluid flow |
| Material Compatibility | Excellent with metals, plastics, and elastomers | Excellent with metals and alloys | Excellent with metals and alloys |
| Chemical Stability | High — ideal for frequent cycling and re-use | Exceptional — long-term inertness | Highly stable when in sealed, dry systems |
| Thermal Stability | High — supports two-phase operation | Very high — stable under extreme loads | High — stable under typical operating conditions |
| Non-flammable | ✔ | ✔ | ✔ |
| Residue-Free | ✔ | ✔ | ✔ |
| Zero Ozone Depletion Potential (ODP) | ✔ | ✔ | ✔ |
| Low Global Warming Potential (GWP) | ✔ | — (PFCs have longer atmospheric life) | ✔ |
| VOC-Exempt (U.S. EPA) | ✔ | — | — |
| Typical Operating Range (°C) | –105 to 85 | –66 to 155 | -75 to 40 |
| Typical Applications | Data centers Semiconductor cooling Immersion systems Vapor degreasing | Power electronics Aerospace Supercomputing Reliability testing | Electronics Sealed heat transfer Immersion cooling applications |
Properties of BestSolv® Thermal Management Fluids
Choosing the right BestSolv® Engineered Fluid depends on your system’s thermal load, dielectric requirements, and operating environment. Each fluid is formulated to deliver consistent performance across wide temperature ranges, allowing designers to balance heat-transfer efficiency, safety, and sustainability.
The chart below serves as a quick reference guide for typical boiling points and operating temperature ranges of each BestSolv® thermal management fluid.
For specialized or extreme operating conditions, our Best Technology applications engineers can provide tailored recommendations and fluid compatibility guidance for your specific system design.
Material Compatibility for Thermal Management
BestSolv® Engineered Fluids are compatible with a wide range of materials used in thermal management systems. Their chemical stability, non-corrosive nature, and residue-free performance make them ideal for long-term use in high-performance cooling and electronic environments.
Polymers
Most “hard” plastics—including polycarbonate, polyethylene, and polypropylene—demonstrate excellent compatibility with BestSolv® HFE and PFC fluids. These materials retain structural integrity and dimensional stability even after extended exposure.
Elastomers
Elastomers that are lightly plasticized or non-plasticized perform well with BestSolv® fluids. Highly plasticized elastomers should be tested prior to use, as they may exhibit softening when exposed to low-viscosity HFE fluids.
Metals
Stainless steel, aluminum, copper, brass, and titanium are all compatible with BestSolv® fluids, making them suitable for use in heat exchangers, tanks, manifolds, and precision cooling systems.
Although BestSolv® fluids are chemically inert, slight variations in solvency exist between HFE-based and PFC-based formulations. HFE fluids (such as BestSolv® 7100, 7200, and 7300) have slightly higher solvency than PFCs and may affect soft elastomers or adhesives. For this reason, compatibility testing on non-production components is always recommended before full-scale implementation.
Immersion Cooling with BestSolv® Fluids
Immersion cooling is the process of submerging servers, electronic components, or entire systems in a non-conductive dielectric fluid that absorbs and dissipates heat directly from the hardware.
BestSolv® fluids—particularly Zulu, 7100, 7200, and 7300—are ideal for immersion cooling in data centers, power converters, and semiconductor environments. By replacing air cooling and heat sinks with direct-contact liquid cooling, operators can:
- Reduce cooling energy consumption by up to 90–95%
- Increase power density and processing capacity without thermal throttling
- Lower data center footprint by reducing the need for large air-handling infrastructure
These fluids are non-flammable, residue-free, and VOC-exempt, making them a safe, efficient, and sustainable choice for continuous operation.
Electronics Reliability Testing with BestSolv® Fluids
Immersion is not only used for thermal management but also for testing and validation of sensitive electronic components. With their high dielectric strength, thermal stability, and chemical inertness, BestSolv® 3283 and BestSolv® 40 are excellent candidates for reliability testing, leak testing, and thermal shock testing in military and aerospace applications.
Electronic assemblies can be tested both physically and electrically while immersed, ensuring accurate results without risk of corrosion or residue. After testing, parts dry quickly with no post-cleaning required.
Common test applications include:
- Gross Leak Testing – Non-destructive verification of hermetic seals using fluorinated liquids to detect bubble formation.
- Thermal Shock Testing – Alternating exposure between hot and cold fluid baths to evaluate electronic component durability under extreme temperature cycling.
Both tests align with MIL-STD-883 and MIL-STD-202 protocols for aerospace and defense microelectronics, ensuring that components meet the reliability standards required for mission-critical systems.
Other Uses of BestSolv® Thermal Management Fluids
Semiconductor manufacturing – Consistent temperature control and heat transfer performance are critical in semiconductor fabrication. BestSolv® thermal management fluids deliver exceptional stability over long operating cycles, ensuring precise process control during wafer production, etching, and testing. Their wide operating ranges outperform aqueous coolants such as deionized (DI) water, minimizing risk of thermal fluctuations and corrosion.
Specialized chiller systems – Precise temperature control is critical in specialized machinery, electronics cooling, low-temperature process chillers, and other closed-loop thermal management systems. BestSolv® thermal management fluids, including BestSolv® 7100, can be used as dielectric, non-flammable, low-residue heat-transfer fluids where standard coolants such as water, glycol, or oil may not meet the system’s operating requirements. Their low viscosity, thermal stability, and compatibility with many common system materials make them a practical option for chiller applications that require reliable circulation, clean operation, and stable performance across repeated heating and cooling cycles.
Military and aerospace – Mission-critical electronics in defense and aviation systems demand cooling solutions that combine reliability, cleanliness, and safety. BestSolv® fluids meet these requirements with non-flammable, dielectric performance that ensures uptime and protects sensitive avionics. They are ideal for spray cooling, power electronics, and high-voltage systems, where conventional oils or glycol coolants are unsuitable.
Pharmaceutical and chemical processing – Thermal stability and worker safety are essential in secondary-loop and freeze-drying applications. BestSolv® fluids offer a clean, non-flammable, and non-reactive alternative to traditional solvents and oils, providing consistent temperature control and high safety margins for operators. Their chemical inertness and low toxicity make them a smart choice for controlled environments in pharmaceutical production and precision chemical processing.
For laboratories using HistoChill® and similar tissue-freezing bath systems, BestSolv® 7100 has been successfully revalidated by medical and laboratory customers as a replacement for 3M™ Novec™ 7000. With physical properties comparable to Novec™ 7000, BestSolv® 7100 offers a familiar transition path that can help minimize process disruption. Best Technology supports pathology, histology, and research laboratories with technical documentation, sample availability, and application guidance. Customers should complete their own internal evaluation and validation procedures for the intended use. Contact us to discuss your specific freezing bath configuration and validation requirements.
BestSolv® Medical Device Policy
BestSolv® thermal management fluids are not intended, nor approved, for direct incorporation into pharmaceuticals, cosmetics, or medical devices. These engineered fluids are designed strictly for use in industrial and manufacturing applications, such as cleaning, cooling, and thermal management processes.
Best Technology does not authorize or support the use of BestSolv® products as ingredients, components, or processing aids in finished medical or consumer products intended for direct human contact.
BestSolv® Thermal Management Fluid Data Sheets
For Best Technology’s Technical Data Sheets, please see the BestSolv® Engineered Fluids Technical Data Sheet (TDS) page.
Get Your BestSolv® Fluids Today
Trusted across aerospace, medical device, and electronics industries, BestSolv® Engineered Fluids offer a full range of high-performance fluids designed for reliability, safety, and system compatibility.
- Validated in aerospace and medical manufacturing
- Exceptional cooling performance across a wide operating temperature range
- Backed by SDS, TDS, and expert application support from Best Technology
With proven performance and regulatory alignment, BestSolv® fluids are your long-term solution for heat transfer and thermal management.
📞 Call us today at (612) 392-2414, ext. 2 to find the right BestSolv® fluid for your application.
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BestSolv® Price and Ordering
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