Quick Answer
Seal and gasket materials are selected by fluid compatibility, compression set, temperature, pressure, motion and service life—not by chemical resistance alone.
Engineering requirements
- Fluid/chemical
- Continuous and peak temperature
- Static vs dynamic seal
- Compression set target
- Pressure and extrusion gap
- Hardness and mechanical targets
Recommended material families
| Material | Role / reason |
|---|---|
| ECO / GECO | Fuel/oil-resistant sealing with balanced flexibility and dynamic performance. |
| CO | Barrier and fluid-resistant specialty sealing. |
| CSM | Chemical/weather-resistant sheet, gasket and outdoor sealing applications. |
Why material selection matters
For static outdoor/chemical gaskets CSM may be attractive; for fuel/oil sealing ECO/GECO/CO may offer a better performance balance.
What to confirm before selecting a grade
- No. Compression set, hardness, temperature and dynamic behavior are equally important.
- When weather, ozone and chemical exposure are important and the compound meets compression and mechanical requirements.
Application note: The final elastomer and compound must be validated in the actual medium, temperature, pressure, dynamic condition and regulatory environment. Published generic resistance rankings are screening tools, not a substitute for application testing.