SSP’s AA 59588 Class 2A 2B, Grade 40 silicone is independently tested and meets the full requirements in A-A-9588.
Specialty Silicone Products (SSP) submitted samples of two 40-durometer military / aerospace silicones to independent ISO 17025 accredited test laboratories. These samples were tested against commercial and military standards.
SSP-220 met the physical and mechanical requirements of A-A-59588, Class 2A and 2B, Grade 40.
SSP-267 met MIL-DTL-25988C, Type 2, Class 2, Grade 40 physical requirements.
The following sections describe the products and summarize the test results.
SSP’s AA 59588 Class 2A 2B, Grade 40 silicone
SSP-220 is a 40-durometer (Shore A), peroxide-catalyzed, heat-cured silicone with high temperature resistance and low compression set that meets the physical and mechanical requirements of A-A-59588, Class 2A and 2B, Grade 40. The A-A-59588 standard supersedes ZZ-R-765 and meets SAE-AMS-3301 for general-purpose, 40-durometer silicone rubber.
SSP submitted a sample of SSP-220 to Smithers Rapra, a global leader in rubber testing. The table below shows how the sample passed the following tests.
| Standard | Description | Test Result |
| ASTM D2240 | Shore A Hardness | Pass |
| ASTM D412 | Properties in Tension for Vulcanized Rubber and Thermoplastic Elastomers | Pass |
| ASTM D792 | Specific Gravity | Pass |
| ASTM D395 | Compression Set | Pass |
| ASTM D573 | Heat Resistance | Pass |
| ASTM D2137 | Low Temperature Brittlepoint | Pass |
| ASTM D471 | Effects of Fluids | Pass |
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