Pneumatic Lubricant (ISO VG 32/46/68) Resistant O-Rings
Compatibility ratings for 7 O-ring materials in Pneumatic Lubricant (ISO VG 32/46/68) service
Pneumatic Lubricant (ISO VG 32/46/68) (Oils & Lubricants) compatibility with the seven most common O-ring elastomers, rated on the standard A/B/C/D scale: A = excellent, B = good, C = fair, D = not recommended. This data also appears in our interactive chemical compatibility chart and is available machine-readable at /api/chemicals.json.
| Material | Rating | Guidance |
|---|---|---|
| NBR | A | excellent — recommended for continuous service |
| FKM | A | excellent — recommended for continuous service |
| EPDM | D | not recommended — rapid degradation expected |
| VMQ | C | fair — conditional use, verify with testing |
| PTFE | A | excellent — recommended for continuous service |
| FFKM | A | excellent — recommended for continuous service |
| HNBR | A | excellent — recommended for continuous service |
Why These Ratings
- NBR (A) — documented strengths include “Mineral oils.”
- FKM (A) — documented strengths include “Mineral oils and greases.”
- EPDM (D) — documented weaknesses include “Mineral oils.”
- VMQ (C) — documented weaknesses include “Petroleum oils (general purpose).”
- PTFE (A) — documented strengths include “Fuels and oils.”
- FFKM (A) — documented strengths include “Fuels and oils.”
- HNBR (A) — documented strengths include “Mineral oils.”
Oils & LubricantsService: Concentration & Temperature Notes
Petroleum oils are the easiest service in this catalog for NBR, FKM, HNBR, PTFE and FFKM — all rate A. Two traps remain: EPDM, which swells severely and rates D across every oil row; and synthetic fluids, whose additive chemistry differs from mineral oil — our hydraulic-synthetic row shows EPDM improving to C while NBR drops to B versus mineral hydraulic oil.
Recommended
- NBR O-rings (A)
- FKM O-rings (A)
- PTFE O-rings (A)
- FFKM O-rings (A)
- HNBR O-rings (A)
Use With Caution
- VMQ O-rings (C)
Avoid
- EPDM (D)
Related Chemicals (Oils & Lubricants)
Frequently Asked Questions
Is Pneumatic Lubricant (ISO VG 32/46/68) compatible with FKM (Viton) O-rings?
FKM is rated A for Pneumatic Lubricant (ISO VG 32/46/68): excellent — recommended for continuous service. Ratings are general guidelines; concentration, temperature and exposure time all affect real-world compatibility, so validate critical applications with ASTM D471 immersion testing.
Is Pneumatic Lubricant (ISO VG 32/46/68) compatible with NBR (nitrile) O-rings?
NBR is rated A for Pneumatic Lubricant (ISO VG 32/46/68): excellent — recommended for continuous service. NBR is the lowest-cost elastomer, so when it earns an A or B rating it is usually the economical default; when it rates C or D, do not substitute it for a higher-rated material to save cost.
Can I use PTFE O-rings with Pneumatic Lubricant (ISO VG 32/46/68)?
PTFE is rated A for Pneumatic Lubricant (ISO VG 32/46/68): excellent — recommended for continuous service. Remember that PTFE has no elastic memory — in demanding service it needs spring energization or an elastomer core (FEP/PFA encapsulation) to maintain sealing force.
What is the best O-ring material for Pneumatic Lubricant (ISO VG 32/46/68)?
NBR, FKM, PTFE, FFKM, HNBR are rated A (excellent) for Pneumatic Lubricant (ISO VG 32/46/68) in our compatibility data and are the recommended starting point for material selection. Final selection should also account for operating temperature, pressure and whether the seal is static or dynamic.
Can I use EPDM O-rings with Pneumatic Lubricant (ISO VG 32/46/68)?
EPDM is rated D for Pneumatic Lubricant (ISO VG 32/46/68): not recommended — rapid degradation expected. Always confirm the specific fluid concentration and temperature before specifying EPDM for this service.
Need O-Rings for Pneumatic Lubricant (ISO VG 32/46/68) Service?
Send us your fluid, concentration and temperature — our engineers will confirm the right compound. MOQ 1 piece.