SSP1331-T Silicone AMS 3301
SSP1331-T is a 40-durometer silicone that meets the physical requirements for AMS 3301. It resists weathering and petroleum-based lube oils.
SSP makes AMS grade silicones meet Aerospace Material Specifications (AMS) from SAE International. These elastomers come in a range of durometers and are tested to AMS 3301, 3302, 3345, 3356E, 3325, 3305J, 3303, or 3304 requirements.
SSP makes aerospace silicones that meet SAE International Aerospace Material Specifications. We offer a full Certificate of Analysis (COA) with every batch for traceability.
Note: SSP also makes MIL-DTL-25988 fluorosilicones, and some prints call out this material as AMS 25988.
The table below describes the AMS silicones that SSP can supply as sheets, rolls, or ready-to-mold compounds, or that we can fabricate into custom molded gaskets or O-rings.
| AMS | SSP Grade | Notes |
| AMS 3301 | SSP1331T | SSP331T is a 40-durometer silicone that meets the physical requirements for AMS 3301. It resists weathering and petroleum-based lube oils. |
| AMS 3302 | SSP1773 | SSP1773 is a 50-durometer silicone that meets the physical requirements for AMS 3302. It's available in red, gray, and brown. |
| AMS 3303 | SSP352 | SSP352 is a 60-durometer silicone that meets the physical requirements in AMS 3303 and AA 59588 Class 2A and 2B, Grade 60. It can be pigmented. |
| AMS 3304 | SSP389 | SSP389 is a 70-durometer, peroxide-catalyzed, heat-cured silicone that meets AMS 3304 and AA 59588, Class 2A and 2B, Grade 70 requirements. |
| AMS 3305J | SSP2554 | SSP2554 is an 80-durometer silicone rubber that meets the physical requirements for AMS 3305J. It resists weathering and petroleum-based lube oils. |
| AMS 3325 | SSP2496 | SSP2496 is a 60-durometer silicone that meets the fuel resistance requirements in AMS 3325. This AMS silicone can be pigmented as required. |
| AMS 3332 | SSP2534 | SSP2534 is a 20-durometer aerospace silicone that meets the requirements of AMS 3332. This AMS silicone is available with a full COA for traceability. |
| AMS3345 | SSP1778 | SSP1778 is a 50-durometer silicone that meets AMS 3345 requirements. It's supplied as a ready-to-mold compound and can be pigmented. |
SSP1331-T is a 40-durometer silicone that meets the physical requirements for AMS 3301. It resists weathering and petroleum-based lube oils.
SSP1773 is a 50-durometer silicone that meets the physical requirements for AMS 3302. It’s available in red, gray, and brown
SSP1778 is a 50-durometer, heat-cured elastomer that’s designed to meet the AMS 3345 specification.
SSP2496 is a 60-durometer silicone that meets the fuel resistance requirements in AMS 3325. This AMS silicone can be pigmented as required.
SSP2534 is a 20-durometer aerospace silicone that meets AMS 3332 requirements. Full certificate of analysis (COA) available for traceability.
SSP2554 is an 80-durometer silicone rubber that meets the physical requirements for AMS 3305J. It resists weathering and petroleum-based lube oils.
SSP352 is a 60-durometer silicone that meets AMS 3303 and AA 59588 Class 2A and 2B, Grade 60. It’s supplied in different form factors and colors.
SSP389 is a 70-durometer, peroxide-catalyzed, heat-cured silicone elastomer that meets the requirements of A-A-59588, Class 2A and Class 2B, Grade 70. Find out if this silicone rubber is right for your application.
AMS silicones meet Aerospace Materials Specification (AMS) standards from SAE International, which was known formerly as the Society of Automotive Engineers (SAE). AMS specifications have four-digit numbers (e.g., AMS 3345) and are part of large and comprehensive database of aerospace materials.
When AMS standards are revised, a sequential letter is appended to the numbered designation (e.g., AMS 3345G). Sometimes, AMS specifications are written as a long alphanumeric string (e.g., AMS3345G) without any spaces.
Aircraft silicones and aviation silicones aren’t the only materials that have AMS numbers, but AMS silicones are used widely in this industry because they resist weathering and petroleum-based lube oils. They also remain flexible over a wide temperature range and resist heat aging.
In addition, AMS silicones can be pigmented so that their colors match larger product designs. Typically, these materials are supplied as sheets, strips, tubing, extrusions, and molded shapes.
| AMS Number | Durometer | Description |
AMS 3301 | 40 | General-purpose |
AMS 3302 | 50 | Heat and weather resistant |
AMS 3303 | 60 | General-purpose |
AMS 3304 | 70 | Heat and weather resistant |
AMS 3305 | 80 | General-purpose |
AMS 3325 | 60 | Fuel and oil resistant |
AMS 3332 | 20 | Extreme low temperature |
AMS 3356E | 60 | Lubricating oil and compress set resistant Electrical grade |
SAE International writes AMS numbers without a space between the letters “AMS” and the three numbers that follow. While AMS3304 is the proper way to describe this material, AMS 3304 and AMS-3304 are also written on project requirements and drawings.
AMS silicones are silicone elastomers that meet Aerospace Material Specifications (AMS) published by SAE International. These specifications define requirements for chemical composition, physical properties, and manufacturing processes to ensure materials used in aircraft and spacecraft meet strict performance and safety standards.
SSP supplies AMS silicones that meet the requirements of AMS 3301, AMS 3302, AMS 3303, AMS 3304, AMS 3305J, AMS 3325, AMS 3332, and AMS 3345, among others. Each grade corresponds to a specific durometer and performance profile.
SSP provides AMS silicones as sheets, rolls, ready‑to‑mold compounds, and can also fabricate custom molded gaskets or O‑rings.
Yes. SSP supplies all AMS silicones with a full Certificate of Analysis (COA) for batch‑level traceability, supporting aerospace and defense quality requirements.
Most AMS silicones operate from approximately –85°F to +401°F (–65°C to +205°C) depending on durometer and grade. These ranges are typical for AMS 3301–3304 materials.
Each AMS grade corresponds to a specific durometer and performance profile:
AMS 3301 – 40 durometer, resistant to weathering and petroleum‑based lubricating oils.
AMS 3302 – 50 durometer, similar resistance profile, available in multiple colors.
AMS 3303 – 60 durometer, also meets AA‑59588 Class 2A/2B Grade 60.
AMS 3304 – 70 durometer, peroxide‑cured, meets AA‑59588 Class 2A/2B Grade 70.
AMS 3305J – 80 durometer, high‑strength, weathering and oil‑resistant.
Yes. AMS 3325 silicones are engineered specifically for fuel resistance, making them suitable for aerospace fuel‑system sealing.
Yes. AMS 3332 is a 20‑durometer aerospace silicone available with full COA traceability.
Yes. SSP manufactures AMS silicones in the United States and provides full documentation for aerospace compliance.
Yes. Several AMS grades—including AMS 3302, AMS 3303, AMS 3325, andAMS 3345—can be pigmented as required.