• A stiff methyl silicone/Teflon? grease
  • Stable across a broad temperature range
  • Typical vapor pressure of 10-8 torr
  • Resistant to chemicals


  • Provides more tack and excellent lubricating and sealing ability under extreme operating conditions
  • For extreme high vacuum and pressure systems
  • Specific applications include: glass and ceramic stopcocks, ground glass joints, and high temperature gaskets, valves, seals and O-rings
Meets or exceeds the ASTM E 595 low outgas specifications outlined in NASA SP-R-0022A and European Space Agency PSS-014-702, with a TML of ≤1% and CVCM of ≤0.1%

Product Details

Property Average Result
Viscosity 1,100,000 cP (1,100,000 mPa*s)
Specific Gravity 1.14
Volatile Content 0.34 %
Appearance Gray
Flow Rate 2.7 in (68.58 mm)
Operating Temperature -40 °C / 230 °C
Comment A stiff methyl silicone/Teflon grease for high vacuum and pressure systems.

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For over 40 years, the NuSil brand has offered a wide range of high-purity silicones. Our team is ready to collaborate with you to provide silicone solutions to satisfy your unique requirements. For additional guidance during your selection process, or to order a sample, contact NuSil today.

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The test data shown for this material is the average value for typical properties. All of these properties may not be tested on a lot to lot basis and cannot be used to draft specifications. Please contact NuSil for assistance and recommendations in establishing limits for product specifications.