The first set of SAE J2643 Standard Reference Elastomers (SRE) was developed in 2004. It was composed of a group of 10 compounds covering multiple elastomer families. Since then, more advanced materials from many elastomer families have been introduced to the automotive industry. The purpose of this study is to add a few more reference compounds to SAE J2643, to enhance the portfolio on FKM, AEM and ACM to reflect advancements in elastomer technology, and make it suitable for a variety of fluids, such as transmission fluid and engine oil.Fourteen standard elastomer compounds were involved in this study, covering various materials currently used in automotive powertrain static and dynamic sealing applications. Participants include OEMs, major rubber manufacturers, a fluid additive company and an independent lab. Manufacturers of each test compound provided formulations, designated ingredients from defined sources, and detailed mixing and molding procedures. All fourteen compounds were molded at Akron Rubber Development Lab (ARDL), the only approved mixing facility for SAE J2643 SRE compounds. Testing specimens were also die-cut by ARDL to minimize sample preparation variation.Two fluids were utilized for the study: ASTM SF105 fluid and General Motors Company DEXRON®-VI automatic transmission fluid (ATF). Elastomer specimens were aged in the designated fluids per ASTM D471. This paper only reports test results for the ASTM SF105 fluid. The DEXRON®-VI results will be reported internally within General Motors Company.