NuTherm® S165 Silicone Heat Transfer Fluid Operating Temperature Range: –80°C to 150°C (Closed Systems Only)

Product Benefits:

• Ultra-low viscosity
• Clear, colorless, odorless
• Low surface tension
• Wide service temperature Range (-80°C to 150°C)
• Hydrophobic
• Thermally stable & long lasting
• Low volatility
• Compatible w/ most seals, O-rings, gaskets, and elastomers

Download TDS:

• NuTherm®-S165-TDS.pdf

Download (m)SDS:

• NuTherm®-S-165-US-EN-2026-02-22-sds.pdf

Description:

NuTherm® S165 is a low-viscosity, linear polydimethylsiloxane (PDMS) silicone heat transfer fluid engineered for extremely low-temperature applications requiring superior pumpability, chemical stability, and long service life. This crystal-clear, colorless, odorless silicone oil delivers reliable performance in closed-loop thermal control systems across a wide temperature range.

Derived from ultra-pure PDMS chemistry, NuTherm® S165 exhibits:

• Very low pour point
• Low viscosity-temperature change (low V.T.C.)
• Exceptional low-temperature stability
• Hydrophobic behavior (insoluble in water)
• Long operating life and oxidative stability

At -40°C, NuTherm® S165 maintains a viscosity of only 6 cSt, making it ideal for circulation systems with limited pump capacity at low temperatures.

Applications:

NuTherm® S165 is recommended for:

• Low-temperature heat transfer systems
• Environmental/thermal test chambers
• Cryostats & refrigerated baths
• Freeze-drying equipment
• Calibration and metrology baths
• Low-temperature recirculating chillers
• Closed-loop low-temperature circulation baths
• Thermostatic control systems requiring ultra-low viscosity fluids

Note: NuTherm® S165 must be used in closed systems, where air exposure is minimized.

NuTherm® S165 Physical Properties

NuTherm® S165

Availability: 5-gallon pails, 55-gallon drums, 275-gallon tote-bins, and bulk tankers.

Shipment: Non-Hazardous for transport via DOT, IMDG, and IATA.

Storage: Keep containers sealed to prevent contamination. Store between 5 to 35°C (40-95°F).

Disposal: Dispose of in accordance with local, state, and federal regulations.