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Applications > Food and Pharma > Chemical Resistance
Kalrez® perfluoreolastomer parts last longer and seal more effectively than other elastomers due to their exceptional chemical resistance and thermal stability.
The overall chemical resistance of EPDMs, silicone elastomers and fluoroelastomers (FKM) is limited by their respective polymer structures. Kalrez® parts, on the other hand, offer the same universal chemical resistance as PTFE, but unlike PTFE, they have elastomeric properties, which help them maintain their sealing capabilities. The table below lists the chemical compatibility of Kalrez® perfluoroelastomer parts and other elastomers used as sealing materials in the pharmaceutical and food handling industries.
Elastomer Chemical Compatibility*
| Chemical |
Kalrez® 6221/6230 |
EPDM |
SI |
FKM |
| Acetic Acid |
A |
A |
A |
B |
| Acetone |
A |
A |
C |
U |
| Citric Acid |
A |
A |
A |
A |
| Hydrogen Peroxide |
A |
B |
B |
B |
| Isopropyl Alcohol |
A |
A |
A |
A |
| Methyl Ethyl Ketone |
A |
A |
U |
U |
| Mineral Oil |
A |
U |
B |
A |
| NaOH |
A |
A |
B |
B |
| Nitric Acid |
A |
B |
B |
A |
| Sodium Hydrochlorite |
A |
B |
B |
A |
| Soybean Oil |
A |
C |
A |
A |
| Steam (<150°C [302°F]) |
A |
A |
C |
U |
| Steam (>150°C [302°F]) |
A |
C |
U |
U |
| Toluene |
A |
U |
A |
A |
| Xylene |
A |
U |
U |
A |
| Maximum Service Temp |
260°C (500°F) |
135°C (275°F) |
200°C (392°F) |
200°C (392°F) |
A = Little or no effect
B = Slight swelling and/or loss of physical properties
C = Moderate to severe swelling and/or loss of physical properties / limited functionality
U = Not suitable or recommended
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- Up to 260°C (500°F)
- Applicable for Stage II sterilization processes
- Extremely low to non-detectable levels in aggressive water sytems
- Well suited for ozonated deionized water service
- Very low swell and loss of mechanical properties after repeated steam cycling
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