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.

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

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