BestSolv® Zulu Engineered Fluid

Replacement for 3M™ Novec™ 649

BestSolv 55 Gal Drum
Part #NameSizeOrdering
23700055BestSolv® Zulu-5555 gal. drum
23700025BestSolv® Zulu-055 gal. pail

Product Description

BestSolv® Zulu Engineered Fluid is a high-purity (99.99% pure) fluorinated ketone fluid that excels as an electronics cooling and heat transfer fluid.

This product is an exact molecule, drop-in replacement for 3M™ Novec™ 649.


Recommended Applications

BestSolv Immersion Cooling
BestSolv Heat Transfer Fluid
BestSolv Semiconductor Thermal Fluid
BestSolv Data Center Cooling Fluid
  • Heat transfer and thermal management applications where non-flammability or environmental factors are a concern
  • Electronics cooling (single or dual phase)
    • Power electronics such as IGBTs or inverters
    • Transformers and other equipment (SF6 replacement)
  • Immersion cooling for data centers and computers
  • Organic rankine cycle
    • Diesel engines
    • Generators
    • Geothermal applications
    • Solar applications

Features and Benefits

  • Drop-in replacement for Novec™ 649
  • Not an HFC, BestSolv® Zulu is a fluoroketone chemical clean agent that leaves no residue
  • Replacement for previous fluids: Sulfur hexafluoride (SF₆), and hydrofluorocarbons (HFCs), such as HFC-134a, HFC-245fa
  • Non-flammable
  • Electrically non-conductive
  • Low Global Warming Potential (GWP)
  • Zero Ozone Depletion Potential (ODP)
  • Clear, colorless, low odor
  • High molecular weight

Composition & Properties

CompositionFluorinated Ketone (99.99%)
CAS # 756-13-8
3M™ Novec™ Replacement TypeExact Molecule
Approved Applications

Thermal Management

Immersion Cooling

Fire Suppression

Magnesium Cover/Shield Gas

Boiling Point120 °F / 49 °C
Pour Point-162 °F / -108 °C
Specific Gravity1.60 g/mL @ 25 °C
Vapor Pressure40.9kPa / 307 mmHg @ 25 °C
Critical Temperature336 °F / 169 °C
Critical Pressure1.88 MPa
Viscosity0.64cPs @ 25 °C
Specific Heat1103 J/kg-K@ 25 °C
Latent Heat of Vaporization @ Boil Point88-kJ/kg
Dielectric Constant1.8 @ 1kHz
Dielectric Strength48kV
Flash PointNone


BestSolv® is distributed exclusively by Best Technology Inc.