ASTM E595 Silicone
ElastaPro makes ASTM E595 silicone for high-vacuum environments. These low outgassing silicones can be used in spaceflight, aerospace, defense, electronics, optics, medical devices, and other sensitive applications.
Because they have a total mass loss (TML) of ≤1.00% and a Collected Volatile Condensable Material (CVCM) of ≤0.10%, these specification grade silicones can also meet NASA requirements. NASA STD-6016 specifies a TML of ≤1.00% and a CVCM of ≤0.10%.
Solid Silicone Sheet and Uncured Silicone Compound
Choose solid silicone sheet or uncured silicone compound that’s specifically formulated and processed to minimize the release of volatile compounds under vacuum and/or heat to prevent the contamination of sensitive components such as lenses, sensors, and electronic circuits.
- Solid sheet materials are post-cured to ensure minimal volatile content and stability. They are easy to die cut and provide a superior sealing and gasketing solution. Thicknesses range from 0.010″ to .0500″ and widths up to 36″ are available.
- Uncured silicone compound can be molded, extruded, or calendered.
Four ASTM E595 Silicones
ElastaPro offers four ASTM E595 silicones in different durometers (hardness) on the Shore A scale.
- ESS40LO is a 40-durometer low outgassing silicone.
- ESS50LO is a 50-durometer low outgassing silicone.
- ESS60LO is a 60-durometer low outgassing silicone.
- ESS70LO is a 70-durometer low outgassing silicone.
Key Characteristics
- Extreme High & Low-Temperature Resistant -85ºF to +525ºF (Intermittent)
- Meets ASTM E595 Outgassing Requirements
- Total Mass Loss (TML) ≤1.00%
- Collected Volatile Condensable Material (CVCM) ≤0.10%
- Post-cured to ensure minimal volatile content and stability
- UV / Ozone Resistant
- Peroxide Free, odorless, and tasteless
- FDA compliant per FDA 21 CFR 177.2600
Material Properties
The table below contains material properties for ElastaPro’s four ASTM E595E silicones.
Properties | Test Method | ESS40LO | ESS50LO | ESS60LO | ESS70LO |
Specific Gravity, g/cc | ASTM D297 | 1.10 | 1.13 | 1.15 | 1.19 |
Durometer, Shore A | ASTM D2240 | 40 ± -5 | 50 ± -5 | 60 ± -5 | 70 ± -5 |
Tensile Strength, psi | ASTM D412 | 1100 | 1200 | 1250 | 1250 |
Elongation, % | ASTM D412 | 900 | 900 | 750 | 650 |
Tear, pp Die B | ASTM D624 | 200 | 175 | 180 | 200 |
Contact ElastaPro to request a quote or for more information.