• Two-part, gray, thermally conductive silicone
  • Based on a dimethyl silicone polymer
  • Uses a platinum-catalyzed addition cure
  • 20:1 Mix Ratio (Part A:B)


  • For applications requiring low outgassing and minimal volatile condensables under extreme operating conditions to avoid condensation in sensitive devices
  • To provide moderate heat transfer between electrical/electronic components and their heat sinks
  • Use to adhere openings in modules or housings where grooves and other configurations require a non-flowable to limited flow material
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
Thermal Conductivity 1 W/(mK)
Cure System Platinum
Tensile 650 psi (4.48 MPa)
Appearance Gray
Cure 24 hours / RTV
Dielectric Strength 430 volts/mil (16.77 kV/mm)
Durometer 85 Type A
Elongation 15 %
Lap Shear 375 psi (2.59 MPa)
Mix Ratio 20:1
Specific Gravity 2.4
Tack Free Time 4 hours
Tear 55 ppi (9.7 kN/m)
Volume Resistivity 140,000,000,000,000 ohmcm
Work Time 2.5 hours
Comment *22) 1.0 W/mK, *4) Primed Lap Shear 375 psi (2.6 MPa)

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.