Rubber: Butyl (IIR) Low Compression Set and Low Moisture/Gas Permeability 65 to 75 Type A Hardness for Seals in Desiccated or Other Systems Requiring Resistance to Gas and/or Water Vapor Permeation
|Publication Date:||1 July 2019|
This specification covers a butyl rubber in the form of molded rings, compression seals, O-ring cord, and molded-in-place gaskets for aeronautical and aerospace applications. For sheet, strip, tubing, extrusions, and molded shapes use AMS3941 specification.
This butyl elastomer is intended for applications requiring resistance to gas and/or water vapor permeation, but usage is not limited to such applications. This butyl elastomer has a typical service temperature range of -53 to 250 °F (-47 to 121 °C) for static seals. The service temperature range of the material is a general temperature range, but the presence of particular fluids and specific design requirements may modify this range. Each application should be considered separately. It is the responsibility of the user to determine that this specification is appropriate for the environments (temperature range, fluids exposure, etc.) in which it is sought to be used.
Order of Precedence
Nothing in this document supersedes applicable laws and regulations unless a specific exemption has been obtained. This specification is in addition to and in no way limiting, superseding, or abrogating any contractual obligation as required by the applicable procurement documents. In the event of conflict in requirements, the order of precedence shall be:
1. Procurement Document or Contractual Agreement and all statutory and regulatory requirements (excluding this document).
2. Applicable purchaser's drawing or SAE Parts Standard.
3. Specification referenced on the drawing.
4. This document.
5. All specifications referenced in this document.
Safety Hazardous Materials
While the materials, methods, applications, and processes described or referenced in this specification may involve the use of hazardous materials, this specification does not address the hazards which may be involved in such use. It is the sole responsibility of the user to ensure familiarity with the safe and proper use of any hazardous materials and to take necessary precautionary measures to ensure the health and safety of all personnel involved.