Compatibility Rating
At 20°C (68°F)
Poor
Not recommended - significant degradation expected
At 50°C (122°F)
Poor
Not recommended - significant degradation expected
Why is Viton (FPM) rated this way to Sodium Hydroxide Caustic Soda?
Viton (FPM) is not recommended for use with Sodium Hydroxide Caustic Soda. Significant degradation or failure is expected.
⚠️ When NOT to use Viton (FPM)
Avoid using Viton Fluoroelastomer with ketones, esters, amines, and hot water/steam. Excellent for fuel and oil applications.
Comparison Table — All Materials for Sodium Hydroxide Caustic Soda
| Material | 20°C | 50°C |
|---|---|---|
| HDPE | A | A |
| LDPE | A | A |
| PP | A | A |
| PTFE | A | A |
| PVDF | B | B |
| FEP | NR | NR |
| ECTFE/ETFE | NR | NR |
| EPDM | A | NR |
| Viton (FPM) | D | D |
| NBR | C | D |
| Silicone | NR | NR |
| SS 316 | B | B |
| SS 304 | B | B |
| Aluminium | D | D |
| PVC Rigid | NR | NR |
| PVC Flexible | NR | NR |
| PMP | NR | NR |
| Polystyrene | NR | NR |
| SAN | NR | NR |
| Polycarbonate | D | D |
| PETG | D | D |
| Acetal (POM) | C | C |
| Nylon (PA) | A | C |
| Polysulfone | NR | NR |
A=Excellent · B=Good · C=Fair · D=Poor · NR=No Data
🌡️ Temperature Note
Maximum service temperature for this material is 200°C. Always verify compatibility at your specific operating conditions.
🔄 Better Alternative?
Consider: PTFE for chemical universality. View all materials for Sodium Hydroxide Caustic Soda →
FAQ
Is Viton (FPM) resistant to Sodium Hydroxide (Caustic Soda)?
Viton (FPM) has Poor (D) resistance to Sodium Hydroxide (Caustic Soda) at 20°C. Not recommended - significant degradation expected.
Can I store Sodium Hydroxide (Caustic Soda) in Viton (FPM) containers?
Use caution - Viton (FPM) is rated D (Poor) for Sodium Hydroxide (Caustic Soda) at room temperature.