A-A-55759 Silicones
ElastaPro makes A-A-55759 silicones. The U.S. government uses this Commercial Item Description (CID) to buy commercially available items.
What is A-A-55759?
A-A-55759 is a CID for silicone rubber sheet. It is published by the General Services Administration (GSA) and specifies the requirements for solid silicone rubber sheets used in various applications. The standard covers different classes and grades of silicone rubber sheets. The table below describes these specification grade silicones.
| Class | Description | Grades |
| Class 1A | Low temperature resistant | 40, 50, 60, 70, and 80 |
| Class 1B | Low temperature resistant and low compression set at high temperature | 40, 50, 60, 70, and 80 |
| Class 2A | High temperature resistant | 25, 40, 50, 60, 70, and 80 |
| Class 3A | Low temperature, tear and flex resistant | 30, 50, and 60 |
| Class 3B | Tear and flex resistant | 30, 50, 60, 80, and 80 |
A-A-55759 vs. ZZR65
The table below compares AA-59588 to the ZZR765 specification that it replaced.
| A-A-55759 1A | ZZR765 |
| A-A-55759 1B | ZZR765 |
| A-A-55759 3A | ZZR765 |
| A-A-55759 3B | ZZR765 |
Additional Information
-
CID:
A-A-55759 is a Commercial Item Description, meaning it’s a standard used by the US government to purchase commercially available items.
-
Silicone Rubber:
The material covered by this CID is silicone rubber, a type of elastomer known for its flexibility and resistance to temperature extremes, ozone, and weather.
-
Sheet:
The CID specifically addresses silicone rubber in sheet form, which can be used for various purposes, including gaskets, seals, and other fabricated parts.
-
Shape 15:
The “Shape 15” designation within the CID refers to a specific form or shape of the silicone rubber sheet.
-
Applications:Silicone rubber sheets meeting A-A-55759 are used in a variety of applications, particularly where a resilient, temperature-resistant material is needed.
