kSil® GP80
kSil® GP80 is a general purpose solid silicone elastomer with an 80 Shore A durometer, making it the firmest grade in the GP solid silicone range. It delivers a tensile strength of 8 MPa and a thermal conductivity of 0.24 W/m·°C. The material meets multiple international food contact, aerospace, and automotive compliance standards.
Key Properties
- Durometer: 80 Shore A (ISO 48-4)
- Tensile Strength: 8 MPa (ISO 37 Type 2)
- Elongation: 300% (ISO 37 Type 2)
- Compression Set, 24 Hours @ 150°C: 18% (ISO 815, 24h @150°C)
- Tear Strength: 20 N/mm (ASTM D624 Die B)
Thermal Conductivity: 0.24 W/m·°C (ASTM C518)
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- Specifications
- Applications
- General Info
- FAQs
Physical Properties
| Property | Value | Test Method |
| Thermal Conductivity | 0.24 W/m·°C | ASTM C518 |
| Colors Available | Translucent, Red Iron Oxide (RIO), Black, White, Blue | Visual |
Mechanical Properties
| Property | Value | Test Method |
| Durometer | 80 Shore A | ISO 48-4 |
| Tensile Strength | 8 MPa | ISO 37 Type 2 |
| Elongation | 300% | ISO 37 Type 2 |
| Tear Strength | 20 N/mm | ASTM D624 Die B |
| Compression Set — 24 Hours @ 150°C | 18% | ISO 815, 24h @150°C |
Compliance
- FDA 21 CFR 177.2600 — Compliant
- BfR XV — Compliant
- EC 1935/2004 — Compliant
- FAR 25.853 — Compliant
- FMVSS 302 — Compliant
- Firm gaskets and seals requiring dimensional stability under sustained compressive load
- Food contact components in processing and packaging equipment
- Aerospace sealing applications requiring FAR 25.853 compliance
- Automotive sealing components requiring FMVSS 302 compliance
- Structural silicone assemblies demanding a high-durometer, resilient elastomer
Common industries: Aerospace, Automotive, Food Processing, Industrial Manufacturing.
kSil® GP80 is the firmest grade within the kSil® GP general purpose solid silicone elastomer family. With an 80 Shore A durometer, it is designed for applications where a firm, dimensionally stable silicone material is required, including structural sealing and high-load gasket applications.
The material exhibits good elongation at 300% and a compression set of 18% after 24 hours at 150°C, indicating reliable elastic recovery under sustained load. A thermal conductivity of 0.24 W/m·°C and tear strength of 20 N/mm complement its mechanical performance profile. The material is available in multiple colors — Translucent, Red Iron Oxide (RIO), Black, White, and Blue — to support color-coded assembly or aesthetic requirements.
Compliant with FDA 21 CFR 177.2600, BfR XV, EC 1935/2004, FAR 25.853, and FMVSS 302.
What differentiates GP80 from softer grades in the kSil® GP solid silicone range?
GP80 is the firmest grade in the GP solid silicone range at 80 Shore A. This higher durometer provides greater dimensional stability and load resistance compared to softer GP grades, making it suited for structural sealing and applications where minimal deformation under load is required.
Why is compression set critical for solid silicone elastomers like GP80?
Compression set measures how well a material recovers its original thickness after being held under compressive load at elevated temperature. For sealing applications, a low compression set indicates that the material will maintain effective sealing force over time rather than taking a permanent set and losing contact pressure. GP80 exhibits a compression set of 18% after 24 hours at 150°C.
What is the operating temperature range for GP80?
The TDS does not specify a discrete operating temperature range for GP80. The compression set test condition is 150°C, and the thermal conductivity test was conducted per ASTM C518. Contact H-O Products for service temperature guidance specific to your application.
Is GP80 suitable for food contact or regulated environments?
Yes. GP80 is compliant with FDA 21 CFR 177.2600, BfR XV, and EC 1935/2004 for food contact applications. It is also compliant with FAR 25.853 for aerospace and FMVSS 302 for automotive environments.
How should GP80 be specified?
Specify grade (GP80), thickness, color (Translucent, Red Iron Oxide/RIO, Black, White, or Blue), compliance requirements, dimensional tolerances, and finished format.
