• A clear, two-part, pourable RTV silicone
  • 100: 0.5 Mix Ratio (Base: Curing Agent)


  • For applications requiring low outgassing and minimal volatile condensibles under extreme operating conditions to avoid condensation in sensitive devices
  • As a sealing, caulking, adhesive or potting material in electronic and space applications where high vacuum environments are encountered
  • As a diluent for reducing the viscosity of other tin condensation controlled volatility silicones because of its low viscosity
  • For applications requiring a broader operating temperature range
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
Cure System Alkoxy
Viscosity 5,000 cP (5,000 mPa*s)
Lap Shear 45 psi (0.31 MPa)
Durometer 21 Type A
Appearance Clear
Cure 7 days / RTV
Elongation 150 %
Mix Ratio 100:0.5
Refractive Index 1.40
Specific Gravity 1.01
Tack Free Time 7.5 hours
Tensile 80 psi (0.55 MPa)
Work Time 6.5 hours
Comment Diluent for Tin Condensation CV Silicones

What Is Space Grade?

Discover what it takes to make silicones worthy of the distinction "Space Grade" and the rigorous testing that these materials undergo.

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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.