Choosing between Silicone and NBR O-rings isn’t just a technical decision—it affects system life, cost, and compliance. So, which one should you choose?
Silicone O-rings are ideal for high heat and sterile environments, while NBR O-rings dominate oil-resistant industrial applications.
Let’s compare the differences and use cases to guide your selection.
What’s the difference between Silicone and NBR O-rings?
Silicone resists heat and UV, while NBR excels with oils and fuels. Your environment determines the right fit.
| Besonderheit | Silikon O-Ring | NBR O-Ring |
|---|---|---|
| Temperaturbereich | -50 °C bis 250 °C | -40 °C bis 120 °C |
| Am besten für | Heat, food, medical | Oil, fuel, hydraulics |
| Chemische Beständigkeit | UV, ozone, dry heat | Oil, fuel, water |
| Kosten | Höher | Erschwinglicher |
Explore Silicone O-Ring specs | Learn more about NBR performance
Which O-ring material performs better in heat or oil?
- Verwenden Silikon O-Ringe for high-temperature, sterile, or outdoor conditions.
- Verwenden NBR O-Ringe in fuel, hydraulic, or lubricated environments.
| Eigentum | Silikon | NBR |
|---|---|---|
| Hitzebeständigkeit | ✅ Excellent (up to 250°C) | ❌ Moderate (up to 120°C) |
| Ölbeständigkeit | ❌ Schlecht | ✅ Ausgezeichnet |
| Wetterbeständigkeit | ✅ Ausgezeichnet | ❌ Schlecht |
How do industries apply Silicone and NBR O-rings?
Silikon O-Ringe:
- Medizinische Geräte
- Food & beverage systems
- Aerospace assemblies
NBR O-Ringe:
- Fuel injection systems
- Hydraulikzylinder
- Automotive gaskets
Compare NBR to FKM O-Rings for more oil-based solutions.
What factors should you consider before choosing?
Use this simple checklist:
-
Temperatur:
- Over 120°C → Silicone
- Under 120°C → Proceed to step 2
-
Media Exposure:
- Oil/fuel → NBR
- UV, dry heat, ozone → Silicone
-
Cost Sensitivity:
- Budget-critical → NBR
- Long-term performance → Silicone
Need custom specs? Try our O-Ring-Maker-Werkzeug.
What do customers say about these materials?
- “NBR O-Rings sealed our diesel pumps perfectly.” – Automotive client
- “Silicone survived 200°C sterilization cycles with no cracks.” – Medical OEM
Tipp: Verwenden this guide to understand sealing fundamentals.
Abschluss
Silicone and NBR serve different needs—match material to environment and you’ll seal with confidence.
Choose the right O-ring for your system
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