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Heat-cured silicone rubber, also known as high-temperature vulcanized (HTV) silicone rubber, is a versatile elastomer that undergoes a curing process at elevated temperatures to achieve its final properties. Composed of silicon, oxygen, carbon, and hydrogen atoms, heat-cured silicone rubber exhibits exceptional thermal stability, flexibility, and resistance to extreme temperatures, making it suitable for various demanding applications.

Heat-cured silicone rubber’s unique combination of properties makes it indispensable in numerous industries, providing reliability and durability in challenging operating conditions.

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Functions and Characteristics

Appearance Density (g/cm3) Hardness Shore A Tensile Strength (MPa) Elongation at break (%) 100% Modulus (MPa) Tear Strength ASTMD 624 Die B (N/mm) Tear Strength ASTMD 624 Die C (N/mm) Compression Set 177℃*22h (%) Rebound (%)
1915 U
Translucent 1.07 16 5.5 1204 0.18 14 16 NA 54
1920 U
Translucent 1.07 20 6.8 1119 0.29 14 16 37 53
1930 U
Translucent 1.08 30 8.0 828 0.48 12 17 41 60
1940 U
Translucent 1.12 41 9.0 701 0.77 16 19 27 58
1950 U
Translucent 1.16 50 8.9 573 1.11 18 22 28 54
1960 U
Translucent 1.18 60 8.9 451 1.85 18 26 20 50
1970 U
Translucent 1.21 70 8.4 379 2.77 19 24 19 44
1980 U
Translucent 1.23 80 8.2 219 4.18 15 24 14 44

HCR 9100

  1. Temperature Resistance: Heat-cured silicone rubber excels in high-temperature environments, withstanding temperatures well beyond those manageable by conventional rubber. This property makes it ideal for applications in aerospace, automotive, and industrial settings.
  2. Flexibility and Elasticity: Despite its resistance to high temperatures, silicone rubber maintains remarkable flexibility and elasticity, allowing it to withstand deformation and recover its original shape.
  3. Chemical Inertness: The material is highly resistant to chemicals, oils, and solvents, ensuring stability and performance in diverse industrial environments.
  4. Electrical Insulation: Heat-cured silicone rubber possesses excellent electrical insulating properties, making it suitable for applications in the electronics industry, such as insulating seals, gaskets, and components.
  5. Weather Resistance: UV and ozone resistance are inherent to silicone rubber, contributing to its durability and suitability for outdoor applications.
  6. Biocompatibility: Medical-grade heat-cured silicone rubber is biocompatible and widely used in the production of medical devices, implants, and seals for pharmaceutical applications.
  7. Sealing and Gasketing: Due to its excellent compressibility and resistance to extreme temperatures, silicone rubber is widely used in sealing and gasket applications, providing reliable performance in challenging environments.


Grade HCR 9150 L HCR 9170 L
Specific gravity ISO 2781 1.13 1.19
Appearance Transparent Transparent
Post cure 200℃4h 200℃4h
Shore A Hardness ASTMD 2240 50 74
Tensile strength(Mpa) ISO 37 8.7 7.8
Elongation break(%) ISO 37 461 278
Tear strength (KN/m) ASTMD 624 A 21 21
Compression set (%) (22h/177℃/25%) STMD 395 B
Rebound resilience(%) ISO 4662 48 46
Advantages Excellent compromise properties & process-ability
Excellent process-ability
Very low migration and volatile of matter,
Comply with food contact regulation
Good heat resistance
Excellent compromises mechanical properties
Can be vulcanized by peroxide or platinum

Major Applications

Automotive Components:

Heat-cured silicone rubber is used in gaskets, seals, and other components in automotive engines, exhaust systems, and under-the-hood applications due to its resistance to heat, oils, and chemicals.

Medical Devices:

Medical-grade heat-cured silicone rubber is employed in the production of implants, catheters, seals, and other medical devices owing to its biocompatibility and stability.

  • Application

    Moulding articles with good mechanical properties and appearance.

  • Packaging

    delivered in 20 kg/carton box.

  • Storage and shelf life

    Be stored in its original unopened packaging at a temperature below 40oC for up to about 12 months from the date of manufacture marked clearly on the packaging. Beyond this date, ELKEM Silicones no longer guarantees that the product meets the sales specifications.

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