BISCO® MS-1670
BISCO® MS-1670 is a premium translucent solid silicone sheeting rated at 70 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: 70 ±5 — ASTM D2240
- Tensile Strength: 1200 psi — ASTM D412
- Elongation: 600% — ASTM D412
- Compression Set, 70 Hours @ 212°F @ 25%: 12.3% — ASTM D395
- Specific Gravity: 1.21 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 | 1.21 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 | 70 ±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% | 12.3% | 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 firm, load-resistant sealing material with minimal creep
- Bio-pharmaceutical equipment seals and fluid control components under high compressive load
- Precision separators and structural sealing elements in diagnostic instrumentation
- Noise and vibration control elements in laboratory equipment requiring firm dimensional stability
- Health tech OEM sealing and gasketing in regulated manufacturing environments demanding firm profile retention
Common industries: Medical devices, bio-pharmaceutical, diagnostic instrumentation, wearable health technology, laboratory equipment.
BISCO® MS-1670 is the firmest grade in the MS-16 series at 70 Shore A, designed for life science sealing applications that require maximum resistance to deformation under compressive load while maintaining the non-toxic, chemically inert properties of a platinum-cured silicone.
With a specific gravity of 1.21 g/cc — the highest in the MS-16 series — this grade provides a dense, dimensionally stable profile appropriate for medical device gaskets, fluid control components, and bio-pharmaceutical seals where gasket creep must be minimized. It meets USP Class 6 requirements and is compliant with 21 CFR 177.2600.
The 12.3% compression set (70 hours @ 212°F @ 25% deflection) is consistent with the firmer grades in the series. At 600% elongation and 150 ppi tear resistance, the material retains sufficient flexibility for die-cut fabrication and in-service performance demands of life science assemblies.
Compliant with USP Class 6 / 21CFR177.2600 — Compliant.
What differentiates BISCO® MS-1670 from softer grades in the MS-16 series?
BISCO® MS-1670 is the firmest grade in the MS-16 series at 70 Shore A, with the highest specific gravity (1.21 g/cc) in the lineup. This density and stiffness profile makes it the appropriate choice when life science gaskets must resist permanent deformation under high or sustained compressive load in medical device and bio-pharmaceutical assemblies, where dimensional integrity of the seal is critical.
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-1670 achieves 12.3% compression set (70 hours @ 212°F @ 25% deflection per ASTM D395), consistent with its firm 70 Shore A profile and appropriate for life science sealing applications requiring high load resistance.
What is the temperature range for BISCO® MS-1670?
BISCO® MS-1670 is rated for service from -80°F to 450°F, as listed on the TDS.
Is BISCO® MS-1670 suitable for medical device and regulated life science environments?
Yes. BISCO® MS-1670 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-1670 be specified?
Specify grade (BISCO® MS-1670), thickness, compliance requirements (USP Class 6 / 21CFR177.2600), dimensional tolerances, and finished format.
