When heat rises, most seals fail. If your standard O-rings can’t handle the pressure—or the temperature—your system is at risk. Choosing the wrong material leads to leaks, equipment damage, and costly downtime.
That’s where a high temperature O-ring kit comes in. Built with heat-resistant materials like Viton and PTFE, these kits provide reliable, long-lasting sealing performance under extreme thermal stress.
What Material Is Best for High Temperature O Rings?
Viton and PTFE are top choices for high-temp sealing.
- Viton (FKM): Flexible, oil- and chemical-resistant, handles up to 200°C.
- PTFE: Ultra-high temperature tolerance up to 260°C but more rigid.
Heat-Resistant O Ring Materials Comparison
| Material | Temp Range | Heat Resistance | Chemical Resistance | Flexibility | Best Use |
|---|---|---|---|---|---|
| Viton (FKM) | -20°C to +200°C | ★★★★☆ | ★★★★☆ | Flexible | Dynamic seals |
| PTFE | -200°C to +260°C | ★★★★★ | ★★★★★ | Rigid | Static seals |
| Silicone | -60°C to +200°C | ★★★★☆ | ★★☆☆☆ | Very soft | Low-pressure |
| NBR | -40°C to +120°C | ★★☆☆☆ | ★★★☆☆ | Flexible | Standard use |
If you’re operating in environments over 120°C, Viton is your go-to upgrade. For stationary, ultra-high-temp sealing, PTFE is best.
🔥 How Hot Can Viton O Rings Get?
Viton O-rings can withstand continuous temperatures up to 200°C (392°F).
They are ideal for:
- Automotive engines
- Hydraulic pumps
- Boiler systems
- Chemical processing lines
One of our European customers in food packaging machinery reduced seal failures by 80% after switching to Viton.
👉 Try our Fuel Injector O Ring Kit for high-temp fuel delivery lines.
💨 Are O Rings Suitable for Steam Applications?
Yes—if made from Viton or PTFE.
Standard NBR will swell and fail in steam. But:
- Viton handles wet steam up to 200°C.
- PTFE is excellent for static, high-pressure steam systems.
👉 Need durable solutions for equipment repair?
Check out our Hydraulic O Ring Kit Guide.
🤔 What’s the Difference Between Viton and PTFE O Rings?
| Feature | Viton (FKM) | PTFE |
|---|---|---|
| Max Temperature | 200°C | 260°C |
| Flexibility | Excellent | Rigid |
| Oil/Chemical Resist | High | Highest |
| Common Use | Engines, hydraulics | Boilers, aggressive fluids |
For most industrial systems, Viton provides the perfect balance of strength and flexibility. PTFE is ideal for static environments needing extreme resistance.
🛠️ Can You Use High Temperature O Rings in Hydraulic Systems?
Absolutely. Viton is a common upgrade in hydraulic sealing.
Hydraulic manifolds and pumps demand seals that resist both heat and high pressure. Viton seals:
- Don’t break down under synthetic fluids
- Reduce downtime from leakage
- Offer excellent compression set resistance
👉 Browse our O Ring Assortment Kits—ready for retrofitting or OEM builds.
Still unsure about size standards?
→ Read: Metric vs Inch O Ring Guide
📦 What’s Included in Our High Temp O Ring Kits?
We offer:
- 382 PCS Inch Kit
- 428 PCS Metric Kit
Each available in Viton or NBR variants.
| Kit Version | Sizes | Cross-Sections | Material Options | Ideal For |
|---|---|---|---|---|
| 382 PCS (Inch) | 30 | 1.78–5.33 mm | NBR / Viton | U.S./JPN machines |
| 428 PCS (Metric) | 30 | 1.50–3.00 mm | NBR / Viton | ISO/DIN systems |
👉 Every kit comes in a durable plastic box, organized by size and ready for immediate fieldwork.
Conclusion: Choose the Right Heat-Resistant Sealing Kit
High-temperature O-rings aren’t just about survival—they’re about system efficiency and uptime.
Whether you’re dealing with hot hydraulic oil, engine heat, or steam, our Viton and PTFE kits ensure confidence.
📩 Request a Quote
Looking for OEM, bulk, or private label high-temp kits?
- 📧 Email: [email protected]
- 📱 WhatsApp: +86 17622979498
We respond within 24h and ship globally.
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