Last updated: July 2026
Silicone Rubber Technical Details, Properties and Temperature Ranges
Silicone rubber is one of the most versatile elastomer materials available, offering exceptional performance across a wide range of temperatures and operating environments. Its combination of flexibility, durability, heat resistance and environmental stability makes it suitable for demanding applications across food processing, medical equipment, automotive, aerospace, electronics and industrial manufacturing sectors.
At Advanced Materials, we manufacture silicone rubber extrusions, gaskets, seals, tubing and mouldings using a wide range of specialist silicone compounds for industrial, food processing, medical and engineering applications. Whether you require food-grade silicone rubber, high-temperature silicone, fluorosilicone or flame-retardant materials, our technical team can help identify the most suitable grade for your application.
To go to the full list of technical details for all the silicone rubber grades we manufacture click below:
Need help selecting the right silicone grade? Contact our technical team or request FREE samples today.
Silicone Rubber Properties
Silicone rubber is often selected because it combines excellent mechanical properties with outstanding resistance to heat, weathering and ageing.
Key Silicone Rubber Properties
- Operating temperatures from -100°C to +300°C depending on grade
- Excellent heat resistance and thermal stability
- Outstanding UV, ozone and weather resistance
- Good flexibility at both high and low temperatures
- Excellent electrical insulation properties
- Low moisture absorption
- Available in FDA-compliant grades
- Available in a wide range of Shore A hardness ratings
These silicone rubber properties make the material suitable for applications where traditional elastomers may fail due to extreme temperatures or environmental exposure.
Silicone Rubber Temperature Range
One of the most searched-for silicone material characteristics is its temperature performance.
Depending on the compound selected, silicone rubber extrusions can maintain flexibility and sealing performance from a low of -100°C to a high of +300°C.
Silicone Rubber Temperature Range Comparison
| Grade | Temperature Range |
|---|---|
| Electrical Sleeving Silicone | -60°C to +300°C |
| Flame Retardant Silicone | -60°C to +250°C |
| General Purpose Silicone | -60°C to +200°C |
| High Strength Silicone | -60°C to +200°C |
| High Temperature Silicone | -60°C to +300°C |
| Low Temperature Silicone | -100°C to +200°C |
| Metal Detectable Silicone | -60°C to +200°C |
| Platinum Cured Silicone | -60°C to +200°C |
| Steam Resistant Silicone | -60°C to +250°C |
Temperature Range of Common Elastomeric Materials
When selecting a sealing or extrusion material, temperature performance is often one of the most important considerations. Compared with many common elastomers, silicone rubber offers one of the widest operating temperature ranges whilst maintaining flexibility and performance in demanding environments.
The comparison below highlights the typical operating temperature ranges of common elastomer materials.
Silicone rubber is often selected where EPDM, Neoprene, Nitrile and other elastomers may not provide sufficient temperature resistance, particularly in applications involving extreme heat, cold or significant temperature fluctuations.
Looking for a silicone compound that can withstand extreme temperatures? Our technical team can recommend the most suitable grade for your operating environment.
Specific Silicone Rubber Grades and Applications
To view the full list of technical details for all the silicone rubber grades we manufacture click below:
FDA-compliant silicone rubber grades and applications suitable for food contact
Silicone rubber and silicone sponge grades are available with FDA compliance. Advanced Materials has extensive experience supplying grades into food processing equipment.
The following table summarises silicone rubber grades that are FDA compliant and suitable for food contact and those that are not:
| Type | Grade Names | FDA Compliant |
|---|---|---|
| Conductive | CB70 | NO |
| Economy grade | S40E; S50E; S60E; S70E | NO |
| Electrical sleeving | AM400/55 | NO |
| Flame retardant | FR70R; FR40SB2; FR50SB2; FR60SB2; FR70SB2 | NO |
| Fluorosilicone | FSE40; FSE50; FSE60; FSE70 | NO |
| Food grade sponge | FGS20; FGS40 | YES |
| General purpose | GP20; GP30; GP40; GP50; GP60; GP70; GP80 | YES |
| Highly filled | HF40; HF50; HF60; HF70; HF80 | NO |
| High tear strength | HS40; HS50; HS60; HS70 | YES |
| High temperature | HT40W; HT50W; HT60W; HT70W | YES* if post cured |
| Low temperature | LT60 | YES |
| Metal detectable | GP20MPWD; GP30MPWD; GP40MPWD; GP50MPWD; GP60MPWD; GP70MPWD | YES |
| Platinum cured | PC20; PC30; PC40; PC50; PC60; PC70 | YES |
| Steam resistant | SR60 | YES |
| Traditional silicone sponge | SS16; SS24; SS33 | NO |
* If post cured.
The Shore Hardness of silicone rubber grades
The following table summarises the Shore Hardness ratings for silicone rubber grades:
| Type | Grade Names | Hardness (°Shore A) |
|---|---|---|
| Conductive | CB70 | 70 |
| Economy grade | S40E; S50E; S60E; S70E | 40–70 |
| Electrical sleeving | AM400/55 | 55 |
| Flame retardant | FR70R; FR40SB2; FR50SB2; FR60SB2; FR70SB2 | 40–70 |
| Fluorosilicone | FSE40; FSE50; FSE60; FSE70 | 40–70 |
| General purpose | GP20; GP30; GP40; GP50; GP60; GP70; GP80 | 20–80 |
| Highly filled | HF40; HF50; HF60; HF70; HF80 | 40–80 |
| High tear strength | HS40; HS50; HS60; HS70 | 40–70 |
| High temperature | HT40W; HT50W; HT60W; HT70W | 40–70 |
| Low temperature | LT60 | 60 |
| Metal detectable | GP20MPWD; GP30MPWD; GP40MPWD; GP50MPWD; GP60MPWD; GP70MPWD | 20–70 |
| Steam resistant | SR60 | 60 |
The industrial use and material properties of silicone rubber grades
The following table summarises the industrial use and material properties of silicone rubber grades:
| Grade | Tensile (N/mm²) | Tear (N/mm) | Elongation (%) |
|---|---|---|---|
| GP60 | 10.4 | 21 | 470 |
| HS60 | 10.0 | 42 | 580 |
| PC60 | 10.4 | 24 | 520 |
| HT60W | 11.0 | 24 | 440 |
| FR70R | 10.2 | 19 | 320 |
| SR60 | 7.5 | 10 | 300 |
Types Of Silicone Rubber Grades
The table below provides an overview of all the silicone rubber grades the Advanced Materials manufactures, arranged in alphabetical order and with key information on grade names, materials usage, Shore hardness, FDA compliance and temperature range, plus links to datasheets.
Grade Names: CB70
General Description of Materials Usage: An electrically conductive grade of silicone rubber which can be considered for applications requiring conductivity such as EMI gaskets, conductive sheaths for ignition cable core, electronic keyboard contacts. CB70 can be supplied as extruded cord, tubing and profiles such as P section and D sections.
Hardness oShore A: 70
FDA compliant: No
Temperature range °C: XXX
See Datasheet
Grade Names: S40E; S50E; S60E; S70E
General Description of Materials Usage: These budget friendly grades of general purpose grades of silicone rubber have good physical properties. We can manufacture strips, cords, tubing and both simple and complicated extruded profiles and silicone rubber mouldings using these materials. Applications include for the construction markets and architectural glazing, as well as general use where compliance to food or pharmaceutical standards is not a requirement
Hardness oShore A: 40 - 70
FDA compliant: Yes
Temperature range °C: -60 – +200
See Datasheet
Grade Names: AM400/55
General Description of Materials Usage: High tear strength grade of silicone rubber, heat stabilised for use at temperature. Suitable for applications such as peristaltic pump tubing, inflatable seals and extruded profiles and small bore silicone sleeving. Used in electrical light fittings and as marker cables.
Hardness oShore A: 55
FDA compliant: No
Temperature range °C: -60 to +300
See Datasheet
Grade Names: FR70R; FR40SB2; FR50SB2; FR60SB2; FR70SB2
General Description of Materials Usage: Often supplied to industries including construction, automotive, railway, marine and aerospace applications. Ask us about specific grades for low smoke & low toxicity applications, for Aircraft FAR 25.853(A), Rail EN 45545-2, and UL94-V0 Flammability.
Hardness oShore A: 40 – 70
FDA compliant: No
Temperature range °C: -60 to +250
See Datasheet
Grade Names: FSE40; FSE50; FSE60; FSE70
General Description of Materials Usage: Fluorosilicone with flexibility over a wide range of temperatures. Fluorosilicone has much more chemical compatibility with a variety of solvents, fuels, oils and many more fluids. These grades can be supplied for extruded profiles, including D sections, P sections, Cord, and Tubing, and can be supplied pale colours, often supplied white or blue. Also known as FMVQ.
Hardness oShore A: 50 - 70
FDA compliant: No
Temperature range °C: -60 – +200
See Datasheet
Grade Names: FGS20; FGS40
General Description of Materials Usage: Food grade silicone sponge developed for seals and dampening on food production lines. Resistant to ultra-violet light, corona, arcing and ozone. It is excellent for vibration damping and for protecting and cushioning components. The materials exhibit a low degree of moisture absorption, therefore mechanical properties show little change, even after prolonged periods of immersion. These grades can be pigmented to pale pastel shades. From the FGS materials we can manufacture cord, strips, and very simple profiles. See also ‘Traditional Sponge’.
Hardness oShore A: Not Applicable
FDA compliant: Yes
Temperature range °C: -60 – +200
See Datasheet
Grade Names: GP20; GP30; GP40; GP50; GP60; GP70; GP80
General Description of Materials Usage: Our most popular material range. Very good physical properties, and a wide range of hardness available, these grades are suitable for complex extruded profiles, mouldings, joined rings, frames and cut gaskets.
Hardness oShore A: 40 - 80
FDA compliant: Yes
Temperature range °C: -60 – +200
See Datasheet
Grade Names: HF40; HF50; HF60; HF70; HF80
General Description of Materials Usage: This highly filled range of silicone rubber has good physical properties and good UV resistance and is often used in the packaging industry. The material is available in most opaque colours. We can supply this as strip, tube, cord, complex extruded profiles or mouldings.
Hardness oShore A: 40 - 80
FDA compliant: No
Temperature range °C: -60 – +200
See Datasheet
Grade Names: HS40; HS50; HS60; HS70
General Description of Materials Usage: Tear resistant materials are particularly suited for pump tubing, inflatable seals and any parts with repeated movement. This range also offers increased resistance to abrasion, and great flexibility.
Hardness oShore A: 40 - 70
FDA compliant: Yes
Temperature range °C: -60 – +200
See Datasheet
Grade Names: HT40W; HT50W; HT60W; HT70W
General Description of Materials Usage: These grades offer well balanced mechanical properties and good hot air resistance. Frequently used for autoclave seals, oven doors, fryer seals and all types of food processing where high temperatures are involved.
Hardness oShore A: 40 - 70
FDA compliant: Yes
Temperature range °C: -60 – +300
See Datasheet
Grade Names: LT60
General Description of Materials Usage: LT60 is a low temperature resistant silicone rubber material from which we can manufacture extruded profiles, tubing, gaskets, cord, and mouldings. Applications include seals for the pharmaceutical industries, hygienic seals for low temperature transportation, and some applications in the aerospace industry Also known as PVMQ, this is phenyl methyl silicone.
Hardness oShore A: 60
FDA compliant: Yes
Temperature range °C: -100 - +200
See Datasheet
Grade Names: GP20MPWD; GP30MPWD; GP40MPWD; GP50MPWD; GP60MPWD; GP70MPWD
General Description of Materials Usage: These materials can be detected by metal detectors making them particularly suitable for food processing lines and equipment and other areas where identifying contamination is essential. Often supplied in Blue.
Hardness oShore A: 20 - 70
FDA compliant: Yes
Temperature range °C:
See Datasheet
Grade Names: PC20; PC30; PC40; PC50; PC60; PC70
General Description of Materials Usage: Very pure silicone rubber suitable for food processing and medical devices. Its excellent translucency makes it a great choice for lighting applications. Once fully post cured this grade is paint-wetting impairment substances (PWIS)-free, making it a great choice for masking. See also ‘Soft platinum cured’.
Hardness oShore A: 60 – 70
FDA compliant: Yes
Temperature range °C: -60 – +200
See Datasheet
Grade Names: GP20; GP30; GP40
General Description of Materials Usage: The GP20 to GP40 range from Advanced Materials represents a low Durometer choice of silicone rubber grade with good mechanical properties. They can be supplied for extruded profiles, including D sections, P sections, Cord, Tubing, Mouldings and Joined frame gaskets and profile rings. These rubbers can be supplied pigmented or transparent.
Hardness oShore A: 20 - 40
FDA compliant: Yes
Temperature range °C: -60 – +200
See Datasheet
Grade Names: PC40; PC50
General Description of Materials Usage: Softer grades of platinum cured silicone rubber suitable for all applications where good translucency is required. PC40 and PC50 have good flexibility, less yellowing and are suitable for food processing applications.
Hardness oShore A: 40 – 50
FDA compliant: Yes
Temperature range °C: -60 – +200
See Datasheet
Grade Names: SR60
General Description of Materials Usage: Our SR60 material is suitable for applications where the silicone rubber will be exposed to steam. Suitable for use in contact with food. Used in autoclaves, steamers and other gaskets. Can be pigmented to pale shades, base material is white.
Hardness oShore A: 60
FDA compliant: Yes
Temperature range °C: -60 – +250
See Datasheet
Grade Names: SS16; SS24; SS33
General Description of Materials Usage: A traditional silicone sponge, excellent for vibration damping, and for protecting and cushioning components. Available in medium to firm densities. All grades exhibit a low degree of moisture absorption. Also available with self-adhesive backing. See also ‘Food Grade Sponge’.
Hardness oShore A: Not applicable
FDA compliant: No
Temperature range °C: -60 – +200
See Datasheet
Which Silicone Rubber Grade Do I Need?
Choosing the correct silicone grade depends on operating temperature, compliance requirements, chemical exposure and application type.
If you’re unsure which silicone rubber compound is most suitable, our technical specialists can help identify the right material for your performance and compliance requirements.
Common Silicone Rubber Applications
Advanced Materials manufactures silicone rubber extrusions, tubing, seals, gaskets and mouldings for customers operating in:
- Food and beverage processing
- Pharmaceutical manufacturing
- Medical device production
- Automotive engineering
- Aerospace applications
- Electronics and electrical systems
- Industrial machinery
- Packaging equipment
Our silicone compounds can be manufactured into bespoke profiles, tubing, seals, gaskets and moulded components to meet specific customer requirements.
Why Choose Advanced Materials?
With extensive experience manufacturing silicone rubber components for demanding industrial applications, Advanced Materials provides both technical expertise and manufacturing capability.
We work closely with customers to select the most appropriate silicone compound based on:
- Operating temperature requirements
- Regulatory compliance needs
- Chemical compatibility
- Mechanical performance
- Environmental exposure
- Manufacturing requirements
We support customers from initial material selection through to manufacture, helping engineers and buyers identify the most suitable silicone compound for their application requirements. Whether you require a standard silicone grade or a bespoke formulation, our team can help.
Frequently Asked Questions
Depending on the grade, silicone rubber extrusions can operate between a low of -100°C and a high of +300°C.
Silicone rubber offers excellent heat resistance, UV resistance, flexibility, weather resistance, electrical insulation and low moisture absorption.
Yes. FDA-compliant and platinum-cured silicone grades are available for food processing applications.
Platinum-cured silicone offers higher purity, improved transparency and is often used in food, medical and pharmaceutical applications.
High Temperature Silicone grades can withstand temperatures up to +300°C and are commonly used in ovens, autoclaves and food processing equipment.
Whether you're looking for food-grade silicone rubber, high-temperature silicone compounds or a bespoke material formulation, our technical team can help.
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