kSil® US60
kSil® US60 is a solid silicone elastomer with a 60 Shore A durometer, a tensile strength of 8 MPa, and an elongation of 275%. It carries the broadest compliance portfolio in the kSil® US series, meeting AA-59588, AMS 3303, BfR XV, EC 1935/2004, FAR 25.853 Horizontal, FDA 21 CFR 177.2600, and FMVSS 302. The material is available in red-orange, black, and grey.
Key Properties
- Durometer: 60 Shore A (ISO 48-4)
- Tensile Strength: 8 MPa (ISO 37 Type 2)
- Elongation: 275% (ISO 37 Type 2)
- Compression Set, 24 Hours @ 150°C: 17% (ISO 815, 24h @150°C)
- Tear Strength: 17 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 | Red-orange, Black, Grey | Visual |
Mechanical Properties
| Property | Value | Test Method |
| Durometer | 60 Shore A | ISO 48-4 |
| Tensile Strength | 8 MPa | ISO 37 Type 2 |
| Elongation | 275% | ISO 37 Type 2 |
| Tear Strength | 17 N/mm | ASTM D624 Die B |
| Compression Set — 24 Hours @ 150°C | 17% | ISO 815, 24h @150°C |
Compliance
- AA-59588 — Compliant
- AMS 3303 — Compliant
- BfR XV — Compliant
- EC 1935/2004 — Compliant
- FAR 25.853 Horizontal — Compliant
- FDA 21 CFR 177.2600 — Compliant
- FMVSS 302 — Compliant
- Gaskets and seals requiring a medium-firm silicone with broad multi-market compliance
- Food contact components requiring simultaneous FDA and European BfR/EC compliance
- Aerospace sealing applications requiring AA-59588 and AMS 3303 qualification
- Aerospace flame compliance applications per FAR 25.853 Horizontal
- Automotive sealing components requiring FMVSS 302 compliance
Common industries: Aerospace, Automotive, Food Processing, Industrial Manufacturing.
kSil® US60 is a medium-firm grade in the kSil® US general purpose solid silicone series, with a 60 Shore A durometer. It is qualified to AMS 3303 and meets AA-59588, and is described on the TDS as carrying the broadest compliance portfolio in the US series — spanning aerospace, automotive, and international food contact standards simultaneously. This makes it suited for multi-market sealing components where a single material grade must satisfy multiple regulatory frameworks.
US60 achieves a tensile strength of 8 MPa, elongation of 275%, and a tear strength of 17 N/mm, with a compression set of 17% after 24 hours at 150°C per ISO 815. Thermal conductivity is 0.24 W/m·°C per ASTM C518. The material is available in red-orange, black, and grey.
Compliant with AA-59588, AMS 3303, BfR XV, EC 1935/2004, FAR 25.853 Horizontal, FDA 21 CFR 177.2600, and FMVSS 302.
What differentiates US60 from US50 and US70 in the kSil® US solid silicone series?
US60 is distinguished within the US series by carrying the broadest compliance portfolio — seven standards spanning aerospace, automotive, and international food contact — compared to US50 (four standards) and US70 (six standards). At 60 Shore A it is firmer than US50 (50 Shore A) but softer than US70 (70 Shore A), making it a medium-firm option with maximum regulatory versatility.
Why is compression set critical for solid silicone elastomers like US60?
Compression set measures the permanent deformation remaining after a material has been held under compressive load at elevated temperature. In gasket and sealing applications, excessive compression set results in loss of contact force and seal degradation over time. US60 exhibits a compression set of 17% after 24 hours at 150°C per ISO 815.
What is the operating temperature range for US60?
No discrete operating temperature range is specified on the manufacturer's TDS for US60. The compression set test condition is 150°C. Contact H-O Products for service temperature guidance specific to your application.
Is US60 suitable for aerospace, automotive, or food contact environments?
Yes. US60 is qualified to AMS 3303 and meets AA-59588 and FAR 25.853 Horizontal for aerospace, is compliant with FMVSS 302 for automotive, and meets FDA 21 CFR 177.2600, BfR XV, and EC 1935/2004 for food contact applications.
How should US60 be specified?
Specify grade (US60), thickness, color (Red-orange, Black, or Grey), compliance requirements, dimensional tolerances, and finished format.
