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Description
High Temperature Rubber Sheet – Heat Resistant 3-20mm | Industrial Grade Silicone/EPDM | Up to +200°C Continuous
When standard rubber fails under heat, our high temperature rubber sheet delivers reliable performance. Engineered for continuous operation at temperatures up to +200°C with intermittent exposure capability to +250°C, this specialist heat-resistant rubber maintains flexibility, sealing properties, and structural integrity in environments where conventional rubber would harden, crack, or completely fail.
Manufactured from a premium Silicone/EPDM high-temperature compound, this industrial-grade rubber sheet is essential for oven seals, furnace gaskets, automotive exhaust applications, steam systems, and any industrial process involving elevated temperatures. Available in thicknesses from 3mm to 20mm, this is the material trusted by UK engineers for critical high-heat applications.
✓ +200°C Continuous / +250°C Intermittent | ✓ FREE UK Delivery | ✓ Cold Flexibility to -40°C | ✓ 16+ Years trusted supplier | ✓ Technical Guidance Available
Understanding High Temperature Rubber
Standard SBR and natural rubber compounds begin to degrade at temperatures above 70-80°C. Continuous exposure causes:
- Hardening: Rubber becomes brittle and loses flexibility
- Cracking: Surface cracks develop under thermal stress
- Compression Set: Rubber loses ability to return to shape after compression
- Outgassing: Volatile compounds release, causing odour and weight loss
- Complete Failure: At extreme temperatures, rubber can melt, char, or combust
Our high temperature rubber uses a Silicone/EPDM compound specifically formulated to resist these degradation mechanisms. The polymer structure and crosslink chemistry are designed for thermal stability, maintaining elastomeric properties across a wide temperature range.
Temperature Performance Specifications
| Operating Condition | Temperature Rating | Notes |
|---|---|---|
| Continuous Operation (Air) | +200°C (392°F) | Indefinite service life |
| Intermittent Exposure | +250°C (482°F) | Short-term peaks |
| Hot Oil Resistance | Up to +150°C | Depends on oil type |
| Steam Service | Up to +180°C (saturated) | Check pressure rating |
| Cold Flexibility | -40°C (-40°F) | Remains flexible |
| Brittleness Point | Below -50°C | Material becomes brittle |
Technical Specifications – High Temperature Rubber Sheet
| Property | Specification | Test Standard |
|---|---|---|
| Material Composition | Silicone/EPDM High-Temperature Compound | ISO 1629 |
| Continuous Temperature (Max) | +200°C | – |
| Intermittent Temperature (Max) | +250°C | – |
| Low Temperature Flexibility | -40°C | – |
| Available Thicknesses | 3mm, 5mm, 6mm, 10mm, 15mm, 20mm | ISO 4648 |
| Standard Width | 1200mm (3-10mm) / 1000mm (15-20mm) | – |
| Sold By | Linear Metre (minimum 1m) | – |
| Shore Hardness | 55-70 Shore A | ISO 48-4 / ASTM D2240 |
| Tensile Strength | ≥6 MPa | ISO 37 |
| Elongation at Break | ≥200% | ISO 37 |
| Compression Set (24h @ 150°C) | ≤30% | ISO 815-1 |
| Density | 1.25 ±0.10 g/cm³ | ISO 2781 |
| Surface Finish | Smooth both sides | – |
| Colour | Red/Brown (natural) | – |
| Ozone Resistance | Excellent | ISO 1431-1 |
| UV Resistance | Excellent | – |
| Weather Resistance | Excellent | – |
Chemical & Environmental Resistance
| Substance/Condition | Resistance | Notes |
|---|---|---|
| Hot Air (Oxidising) | Excellent | Primary design application |
| Steam | Good | Up to saturated steam |
| Hot Water | Excellent | Up to +100°C |
| Mineral Oils (Hot) | Moderate | Depends on oil type |
| Silicone Oils | Poor | Not recommended |
| Ozone | Excellent | – |
| UV Radiation | Excellent | – |
| Dilute Acids | Good | – |
| Dilute Alkalis | Excellent | – |
| Ketones & Esters | Poor | Avoid exposure |
| Chlorinated Solvents | Poor | Avoid exposure |
Industrial Applications for High Temperature Rubber
Oven & Furnace Seals
The primary application for high temperature rubber – sealing industrial ovens and furnaces:
- Oven door gaskets – Maintains seal integrity through heating cycles
- Inspection port seals – Allows access while maintaining thermal containment
- Conveyor entry/exit seals – Flexible sealing at continuous oven openings
- Heat treatment furnace gaskets – Sealing annealing and hardening furnaces
- Kiln door seals – Ceramic, brick, and pottery kilns
Automotive Exhaust Applications
- Exhaust manifold gaskets – Heat shielding at high temperatures
- Heat shields – Isolating heat from sensitive components
- Turbocharger insulation – Protecting adjacent components
- Exhaust hanger mounts – Vibration isolation at elevated temperatures
Steam Systems
- Steam pipe flange gaskets – Sealing saturated and superheated steam
- Steam trap gaskets – High-temperature, high-cycle applications
- Boiler access seals – Inspection and cleaning access ports
- Pressure vessel gaskets – Where temperature exceeds standard rubber limits
Hot Oil Systems
- Thermal oil flange gaskets – Heat transfer oil circuits
- Hot oil pump seals – Sealing rotating equipment
- Heat exchanger gaskets – Plate and shell-and-tube exchangers
Food & Beverage Processing
- Commercial oven seals – Bakery and food service equipment
- Pasteurisation equipment – High-temperature processing
- Sterilisation chamber seals – Autoclave applications
- Hot fill equipment – Beverage and sauce bottling
Note: For direct food contact applications, specify food-grade high-temperature silicone – contact us for options.
Aerospace & Defence
- Engine compartment sealing – Aircraft and ground vehicle applications
- Exhaust system components – High-performance engines
- Environmental sealing – Extreme temperature cycling
General Industrial
- Vibration isolation mounts – Hot machinery mounting
- Protective linings – Shielding from radiant heat
- Electrical insulation – High-temperature electrical applications
- Die-cut gaskets – Custom shapes for specific equipment
Thickness Selection Guide
3mm High Temperature
Best for: Thin gaskets, door seals where minimal compression is required, heat shields, die-cut components. The thinnest option for applications where material depth is limited.
5mm High Temperature
Best for: General-purpose high-temperature sealing, oven door gaskets, flange seals. Our most popular thickness for industrial oven applications.
6mm High Temperature
Best for: Applications requiring additional compression allowance, uneven sealing surfaces, or enhanced thermal insulation properties.
10mm High Temperature
Best for: Heavy-duty sealing applications, significant gap filling, vibration isolation in hot environments, enhanced thermal barrier.
15mm High Temperature
Best for: Maximum compression range applications, large gap sealing, thermal isolation of equipment, mounting pads in high-temperature environments.
20mm High Temperature
Best for: Extreme applications requiring maximum thermal isolation, heavy equipment mounting, structural support in hot environments, custom fabrication of thick gaskets.
Comparison: High Temperature Rubber vs Alternatives
| Material | Max Continuous Temp | Flexibility | Cost | Best For |
|---|---|---|---|---|
| Standard SBR | +70°C | Excellent | Low | Ambient temperature applications |
| EPDM | +120°C | Good | Medium | Moderate heat, steam resistance |
| Silicone/EPDM HT | +200°C | Good | Medium-High | Most high-temp applications |
| Pure Silicone | +250°C | Excellent | High | Extreme temperatures, food contact |
| Viton® (FKM) | +200°C | Moderate | Very High | High temp + chemical resistance |
Why RubberMatting-Direct for High Temperature Rubber?
🌡️ Proven Performance
Our high-temperature rubber is specified by engineers across UK industry for critical sealing applications.
📦 FREE UK Delivery
All orders ship FREE to UK mainland addresses – no minimum order requirements.
✂️ Cut to Length
Order exactly what you need. No minimum roll purchases required.
📞 Technical Support
Not sure if this material suits your application? Our team can advise on material selection for your specific temperature and chemical environment.
💼 Trade Discounts
Buying for ongoing production requirements? Contact us for volume pricing and scheduled delivery.
🏆 16+ Years Experience
We've been supplying specialist rubber to UK industry since 2009.
Frequently Asked Questions
What temperature can high temperature rubber sheet withstand continuously?
Our high temperature rubber sheet can withstand +200°C (392°F) continuous operation in air, and +250°C (482°F) for intermittent exposure (short-term peaks). This is suitable for most industrial oven sealing, furnace gaskets, and exhaust applications. The material maintains its flexibility and sealing properties throughout this temperature range without hardening, cracking, or significant compression set. For applications exceeding +200°C continuous, please contact us to discuss pure silicone or other specialist materials.
Can this rubber be used for industrial oven door seals?
Yes – oven door sealing is one of the primary applications for our high temperature rubber sheet. The material is specifically designed to withstand the repeated heating and cooling cycles that oven seals experience. It maintains flexibility to compress against the door frame when closed, provides effective thermal sealing to maintain oven temperature, and won't harden or crack over time like standard rubber. For most industrial ovens operating up to +200°C, the 5mm or 6mm thickness is recommended. For ovens with significant door gaps or uneven frames, consider the thicker gauges.
Is high temperature rubber suitable for steam pipe gaskets?
Yes, our high temperature rubber has good resistance to steam and can be used for steam pipe flange gaskets. It's suitable for saturated steam up to approximately +180°C. For superheated steam at higher temperatures, or for high-pressure steam systems, you should verify that the specific pressure-temperature combination falls within the material's capability. The EPDM component in our compound provides enhanced steam resistance compared to pure silicone. For critical high-pressure steam applications, graphite-based gaskets may be more appropriate – contact us to discuss your specific requirements.
What's the difference between high temperature rubber and pure silicone rubber?
Our high temperature rubber uses a Silicone/EPDM blend compound rather than pure silicone. Key differences: Temperature: Pure silicone can handle +250°C continuous vs +200°C for our blend. Chemical resistance: Our blend has better resistance to steam, oils, and some chemicals than pure silicone. Mechanical properties: Our blend has higher tensile strength and better abrasion resistance. Cost: Our blend is more economical than pure silicone. Food contact: Pure silicone is typically preferred for direct food contact at high temperatures. For most industrial applications up to +200°C, our Silicone/EPDM blend offers the best combination of performance and value.
Can high temperature rubber be die-cut or machined into custom shapes?
Yes, our high temperature rubber sheet can be easily fabricated into custom shapes. It can be die-cut for production volumes, waterjet cut for precision shapes, laser cut (though this may affect edge quality), or manually cut with sharp blades and templates. The material cuts cleanly without excessive stretching or tearing. For simple shapes, you can cut it yourself with a sharp Stanley knife and straight edge. For complex gaskets or production quantities, we can recommend specialist gasket cutters. The material can also be machined on lathes and mills with appropriate tooling.
Order High Temperature Rubber Today
Select your required thickness from the options above. All orders include FREE UK delivery. For technical advice on material selection or bulk pricing enquiries, contact our specialist team.
High Temperature Rubber Sheet Heat Resistant 3-25mm Industrial | RubberMatting-Direct
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