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Dimethyl Silicone Oil

High Viscosity Silicone Fluids

Chemical Name:Polydimethylsiloxane Fluid / PDMS Silicone Oil
Product Category:Pure Silicone Fluids  – Silicone Fluids
Structural Formula:silicone-oil-63148-62-9-_11_65_b_116566
CAS No.:CAS No.63148-62-9
Molecular Formula:C₆H₁₈OSi₂
Molecular Weight:162.38 g/mol

Polydimethylsiloxane Fluid / PDMS Silicone Oil

High Viscosity Pure Silicone Fluids are clear, colorless, and odorless linear Polydimethylsiloxane fluids / PDMS Silicone Oils that range in viscosities from 5,000cSt to 100,000cSt (centistokes) @ 25°C. They are characterized by their low pour points, high flash points, wide service temperature range, low viscosity change at temperature (low VTC), excellent lubricity, high dielectric strength, RI Values between 1.3970 to 1.4000, and inertness to virtually all substrates.

Viscosity (cSt)5,000cSt10,000cSt12,500cSt30,000cSt60,000cSt100,000cSt
Specific Gravity0.9750.9750.9750.9750.9750.975
Refractive Index1.40351.40351.40351.40351.40351.4035
Pour Point-50°C-48°C-48°C-42°C-42°C-41°C
Flash Point (open cup)315°C315°C315°C315°C315°C321°C
Thermal Expansion (cc/cc °C)0.000960.000960.000960.000960.000960.00094
Thermal Conductivity g/cal/cm/sec °C0.000380.000380.000380.000380.000380.00038
  • High Viscosity PDMS Silicone Oils
  • High Flash Points
  • Low pour points
  • Wide Service Temperature Range
  • Low viscosity change at temperature (low VTC)
  • RI Matching Fluids for RI Value 1.4035
  • High Dielectric Strength
  • High Damping Action
  • High Oxidation Resistance
  • Stable under high rates of pressure
  • Stable under high rates of shear
  • Excellent Lubricity

Applications Include:

  • Damping Fluids for Gauges, Instrument & Electronics
  • O‐Ring, Gasket & Valve Lubricant
  • Cable Lubricant
  • Dielectric Fluids
  • Down‐Hole Fluids for Oil & Gas Exploration
  • Hydraulic Fluids
  • Flow Control Fluid
  • High Pressure Fluid
  • Refractive Index Matching Fluids
  • RI Matching Fluids for LED and Optics
  • VOC Exempt Fluids for Renewable Energies
  • Lubricants for Plastic Parts
  • Lubricants for Rubber Parts
  • Fluid for Touch Screen Technology
  • Vibration Control Fluid
  • Calibration Fluid

Packaging Specifications

Packaging Specifications
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High Viscosity Silicone Fluids : Guide

High Viscosity Silicone Fluids are widely used in Flow Control, Temperature Control and Motion Control technologies. In comparison to conventional oils, they offer a distinct advantage for instruments, gauges and devices that are subject to extreme temperatures and high pressures.

Due to their high damping action, low viscosity change at temperature, wide service temperature range and inertness, High Viscosity Fluids are widely as damping fluids to reduce vibration and amplitude of motion.

High Viscosity Silicone Fluids possess excellent lubricity, high tack, and are compatible with virtually all plastic and rubber materials. As such, there are widely used to lubricate O‐rings, gaskets, valves and seals.

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