SSP-1331-T is a 40-durometer silicone that meets the physical requirements for AMS 3301. It resists weathering and petroleum-based lube oils.


AMS 3301 Silicone Rubber, 40 Durometer

SSP-1331-T is a 40-durometer silicone rubber that meets the physical requirements in the AMS 3301 specification. It is used typically for parts that operate from -85°F to 400°F (-65°C to 205°C). SSP-1331-T remains flexible over this temperature range but is not limited to such applications. This AMS 3301 silicone also resists weathering and petroleum-based lubricating oils. SSP-1331-T is supplied as a ready-to-mold compound or as compression molded sheet stock. It’s available in black, red, or gray. 

AMS 3301 Specification

The AMS 3301 specification covers silicone rubber in the form of sheets, strips, tubing, extrusions, and molded shapes. SAE International, a professional association and standards-developing organization, defines Aerospace Material Specifications (AMS) like AMS 3301.

AMS 3301 Shelf Life

The shelf life for catalyzed SSP-1331-T is two months. Store below 80°F. Cold storage will extend shelf left.

AMS 3301 Spec and SSP-1331-T Test Data

The table below compares typical values for SSP-1331-T against the AMS 3301 spec. The test data for this military and aerospace silicone was generated with Bis(2,4 Di -Chlorobenzoyl) Peroxide catalyst system.



Typical Values

Shore A

35 - 45


Tensile Strength, psi

700 min


Elongation %

250 min


Tensile Stress @ 100%

200 max


Tear-B, ppi

55 min


Comp Set (70/150°C), %

25 min


Specific Gravity



Fluid Immersion  (IRM901 Oil)

Shore A change, points

-15 max


Tensile change, %

-25 max


Elongation change, %

-20 max


Volume Change, %

15 max


Heat Age 70 hours @ 225°C

Shore A change, points

10 max


Tensile change, %

-20 max


Elongation change, %

-40 max





Low Temperature Brittle Point @ -65°C

Pass 5 of 5



AMS 3301 Data Sheet

Download the SSP-1331-T data sheet and compare this PDF against the AMS 3301 specs from SAE International.

Contact SSP to request a quote, or for additional information about this silicone rubber.