kSil® GP60
kSil® GP60 is a general purpose solid silicone elastomer rated at 60 Shore A, offering medium-firm hardness with excellent compression set performance and high tensile strength for demanding sealing and structural silicone applications. It delivers 10 MPa (~1450 psi) tensile strength and 400% elongation, with compression set of 10% (22 hours @ 300°F) and 13% (24 hours @ 150°C). The material meets multiple international compliance standards including FDA 21 CFR 177.2600, FAR 25.853, FMVSS 302, and WRAS.
Key Properties
- Durometer: 60 Shore A — ISO 48-4
- Tensile Strength: 10 MPa (~1450 psi) — ISO 37 Type 2
- Elongation: 400 % — ISO 37 Type 2
- Compression Set, 22 Hours @ 300°F: 10 % — ISO 815, 22h @175°C
- Thermal Conductivity: 0.24 W/m·°C — ASTM C518
Tear Strength: 22 N/mm (~126 ppi) — ASTM D624 Die B
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- Specifications
- Applications
- General Info
- FAQs
Physical Properties
| Property | Value | Unit | Test Method |
| Colors Available | Translucent, Red Iron Oxide (RIO), Black, White, Blue | Visual | Visual |
Mechanical Properties
| Property | Value | Unit | Test Method |
| Durometer | 60 | Shore A | ISO 48-4 |
| Tensile Strength | 10 MPa (~1450 psi) | MPa | ISO 37 Type 2 |
| Elongation | 400 | % | ISO 37 Type 2 |
| Compression Set — 22 Hours @ 300°F | 10 | % | ISO 815, 22h @175°C |
| Compression Set — 24 Hours @ 150°C | 13 | % | ISO 815, 24h @150°C |
| Tear Strength | 22 N/mm (~126 ppi) | N/mm | ASTM D624 Die B |
Thermal Properties
| Property | Value | Unit | Test Method |
| Thermal Conductivity | 0.24 | W/m·°C | ASTM C518 |
Regulatory / Compliance Data
| Property | Value | Test Method |
| FDA 21 CFR 177.2600 | Compliant | — |
| FAR 25.853 | Compliant | — |
| FMVSS 302 | Compliant | — |
| WRAS | Compliant | — |
Compliance
- FDA 21 CFR 177.2600 — Compliant
- FAR 25.853 — Compliant
- FMVSS 302 — Compliant
- WRAS — Compliant
- Demanding gaskets and seals requiring medium-firm hardness, high tensile strength, and low compression set
- Food contact components requiring FDA 21 CFR 177.2600 compliant silicone
- Aerospace sealing assemblies compliant with FAR 25.853
- Automotive sealing components compliant with FMVSS 302
- Water contact applications requiring WRAS-compliant silicone elastomer
Common industries: Food processing, aerospace, automotive, water infrastructure, general industrial.
kSil® GP60 is a medium-firm grade in the kSil® GP general purpose solid silicone series at 60 Shore A, combining the highest tensile strength in the series (tied with GP70 at 10 MPa / ~1450 psi), high tear resistance (22 N/mm / ~126 ppi), and excellent compression set performance — 10% at 22 hours @ 300°F, one of the lowest compression set values among grades tested at that condition.
It is well suited for demanding sealing and structural applications where the gasket must resist deformation under sustained compressive load while maintaining high physical strength and broad multi-standard compliance.
Colors are available as Translucent, Red Iron Oxide (RIO), Black, White, and Blue. Shelf life is defined as the duration of time for which the product will meet the physical characteristics outlined on the TDS; it does not guarantee the product’s usefulness in all applications.
Compliant with FDA 21 CFR 177.2600, FAR 25.853, FMVSS 302, and WRAS.
What differentiates kSil® GP60 from softer and firmer grades in the GP series?
kSil® GP60 delivers the highest tensile strength in the series (tied with GP70 at 10 MPa / ~1450 psi) and achieves 10% compression set at 22 hours @ 300°F — a significant improvement over the softer GP grades — alongside a medium-firm 60 Shore A durometer. It is the appropriate selection for demanding sealing and structural applications where both high physical strength and excellent compression set performance are required, while retaining sufficient flexibility at 400% elongation for die-cut fabrication and in-service movement accommodation.
Why is compression set an important consideration for solid silicone elastomers?
Compression set measures how well an elastomer recovers its original thickness after sustained compression. In sealing applications, a material with high compression set will permanently deform over time, reducing sealing force and allowing leak paths to develop. kSil® GP60 achieves 10% compression set (22 hours @ 300°F per ISO 815) and 13% (24 hours @ 150°C), providing excellent sealing force retention among grades tested at elevated temperatures.
What is the operating temperature range for kSil® GP60?
No operating temperature range is specified on the manufacturer's TDS for this material. Compression set conditions tested at 300°F (175°C) and 150°C indicate suitability for elevated temperature service. Contact H-O Products Corporation for application-specific temperature guidance.
Is kSil® GP60 suitable for aerospace, automotive, food contact, and regulated environments?
Yes. kSil® GP60 meets FDA 21 CFR 177.2600, FAR 25.853 (aerospace), FMVSS 302 (automotive), and WRAS (water contact), as stated on the TDS.
How should kSil® GP60 be specified?
Specify grade (kSil® GP60), thickness, color (Translucent, Red Iron Oxide, Black, White, or Blue), compliance requirements, dimensional tolerances, and finished format.
