YQXPOLYMER
Material Selection
Specialty elastomer selection guide comparing CSM, ECO, CO, GECO, NBR, EPDM, CR, ACM, HNBR and FKM by application requirement.
Quick Answer
Choose elastomers by the dominant requirement—not by a single “best rubber” ranking. CSM is strongest where weather/ozone/chemical durability dominate; epichlorohydrin rubbers are strongest where fuel/oil resistance and low permeability must be balanced.
Choose by requirement
| Requirement |
YQXPOLYMER starting pathway |
What to compare |
| Outdoor weather / ozone |
CSM |
EPDM, CR depending chemical and cost requirements |
| Fuel / vapor permeability |
CO / ECO / GECO |
NBR, HNBR, FKM depending temperature and fuel |
| Oil-resistant dynamic sealing |
ECO / GECO |
NBR, ACM, HNBR, FKM |
| Chemical + outdoor exposure |
CSM |
CR, EPDM, FKM depending chemical |
| Low-temperature + fuel balance |
ECO / PECO / selected GECO |
NBR/HNBR/FKM by exact grade |
Material comparisons
CSM vs EPDM
Weathering plus chemical/oil trade-offs.
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CSM vs CR
Chemical and long-term outdoor durability.
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CSM vs NBR
Weather/chemical performance vs oil-focused economy.
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CSM vs FKM
Outdoor/chemical versatility vs premium high-temperature sealing.
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ECO vs NBR
Permeability and aging vs cost and broad availability.
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ECO vs ACM
Fuel/permeability balance vs hot-oil automotive positioning.
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ECO vs HNBR
Permeability/ozone balance vs mechanical/heat performance.
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ECO vs FKM
Cost/performance balance vs premium chemical/heat capability.
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CO vs ECO vs GECO
Choose the epichlorohydrin polymer structure first.
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