CSM vs EPDM vs FKM: Engineering Material Selection
CSM, EPDM and FKM each address different combinations of weathering, chemical exposure, temperature, fuel/oil contact, cost and processing requirements. No single elastomer is the best choice for every environment.
Selection framework
- CSM: often considered where weathering, ozone resistance and selected chemical exposure are important.
- EPDM: often evaluated for water, steam, weathering and electrical-insulation applications, subject to compound design.
- FKM: often selected for higher-temperature and fuel/oil environments where its cost and processing requirements are acceptable.
Service life cannot be predicted from polymer family alone. Compound formulation, cure system, temperature, media, mechanical stress, geometry and maintenance conditions all affect durability.
Technical note: Use polymer-family comparisons for screening only; qualify the actual compound or finished component under defined service conditions.
