BISCO® MS-1660
BISCO® MS-1660 is a premium translucent solid silicone sheeting rated at 60 Shore A, produced from a low volatile, peroxide-free, platinum-cured raw material for use in life science and medical device applications. It delivers a non-toxic, chemically inert cured product with a glossy smooth surface finish and is rated for service from -80°F to 450°F. The material meets USP Class 6 requirements and is compliant with 21 CFR 177.2600.
Key Properties
- Durometer, Shore A: 60 ±5 — ASTM D2240
- Tensile Strength: 1200 psi — ASTM D412
- Elongation: 600% — ASTM D412
- Compression Set, 70 Hours @ 212°F @ 25%: 12.2% — ASTM D395
- Specific Gravity: 1.17 g/cc — ASTM D297
- Temperature Range: -80°F to 450°F
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- Specifications
- Applications
- General Info
- FAQs
Physical Properties
| Property | Value | Test Method |
| Material / Substrate | Solid Silicone | — |
| Color | Translucent | — |
| Surface Finish | Glossy Smooth | — |
| Specific Gravity | 1.17 g/cc | ASTM D297 |
| Thickness | 0.010″, 0.015″, 0.031″, 0.063″, 0.094″, 0.125″, 0.188″, 0.250″, 0.375″, 0.500″ | — |
Mechanical Properties
| Property | Value | Test Method |
| Durometer, Shore A | 60 ±5 | ASTM D2240 |
| Tensile Strength | 1200 psi | ASTM D412 |
| Elongation | 600% | ASTM D412 |
| Tear Resistance | 150 ppi | ASTM D624 |
| Compression Set, 70 Hours @ 212°F @ 25% | 12.2% | ASTM D395 |
Thermal Properties
| Property | Value | Test Method |
| Temperature Range | -80°F to 450°F | — |
Regulatory / Compliance Data
| Property | Value | Test Method |
| USP Class 6 / 21CFR177.2600 | Compliant | — |
Compliance
- USP Class 6 / 21CFR177.2600 — Compliant
- Gaskets and seals for medical devices requiring a medium-firm, dimensionally stable sealing material
- Bio-pharmaceutical equipment seals and fluid control components under sustained compressive load
- Wearable monitoring device components requiring firm, body-compatible silicone
- Noise and vibration control elements in diagnostic and laboratory instrumentation
- Health tech OEM sealing and gasketing in regulated manufacturing environments
Common industries: Medical devices, bio-pharmaceutical, diagnostic instrumentation, wearable health technology, laboratory equipment.
BISCO® MS-1660 is a medium-firm grade in the MS-16 series at 60 Shore A, providing meaningful resistance to deformation under compressive load for life science sealing applications where dimensional stability is required. Produced from a low volatile, peroxide-free, platinum-cured silicone compound, it yields a non-toxic and chemically inert cured product.
With 1200 psi tensile strength, 150 ppi tear resistance, and 600% elongation, it shares the same peak mechanical strength profile as MS-1650 while delivering greater firmness and improved resistance to gasket creep under sustained pressure.
The 12.2% compression set (70 hours @ 212°F @ 25% deflection) is higher than the softer grades in the series, consistent with its firmer compound structure. The glossy smooth surface and translucent appearance support use in precision life science and medical device assemblies.
Compliant with USP Class 6 / 21CFR177.2600 — Compliant.
What differentiates BISCO® MS-1660 from softer and firmer grades in the MS-16 series?
BISCO® MS-1660 provides a medium-firm 60 Shore A profile with a specific gravity of 1.17 g/cc, offering greater dimensional stability under compressive load than the 40 or 50 Shore A grades while maintaining the same 1200 psi tensile and 150 ppi tear performance. It is the appropriate selection when life science gaskets must resist creep or permanent deformation under sustained sealing pressure in medical device assemblies.
Why is compression set an important consideration for solid silicone elastomers in medical and life science applications?
Compression set measures how well an elastomer recovers its original thickness after sustained compression. In medical device gaskets and seals, a material with high compression set will permanently deform over time, degrading the seal and potentially compromising sterility or fluid containment. BISCO® MS-1660 achieves 12.2% compression set (70 hours @ 212°F @ 25% deflection per ASTM D395), which, while higher than the softer grades in the series, remains within acceptable bounds for medical sealing applications requiring firm dimensional stability.
What is the temperature range for BISCO® MS-1660?
BISCO® MS-1660 is rated for service from -80°F to 450°F, as listed on the TDS.
Is BISCO® MS-1660 suitable for medical device and regulated life science environments?
Yes. BISCO® MS-1660 is compliant with USP Class 6 and 21 CFR 177.2600, and is produced from a low volatile, peroxide-free, platinum-cured raw material providing a non-toxic and chemically inert cured product, as stated on the TDS.
How should BISCO® MS-1660 be specified?
Specify grade (BISCO® MS-1660), thickness, compliance requirements (USP Class 6 / 21CFR177.2600), dimensional tolerances, and finished format.
