Typical Properties of Extra-firm Density Closed Cell Silicone Foam
Description: Extra-firm density closed cell silicone foam material designed to be used in gaskets applications that require greater sealing capabilities than a traditional sponge rubber offers. Extra-firm density closed cell silicone foam can be utilized to seal electronic, outdoor, and lighting enclosures while providing protection against wind, fire, and rain. This material is a lightweight silicone foam and provides users with an operating temperature of -67°F to +392°F, with the ability to withstand +482°F on an intermittent basis. Extra-firm density closed cell silicone foam provides users with excellent UV and ozone resistance and is often used as a material to isolate vibration or reduce shock. A UL 94 V-0 and UL 94 HF-1 listed material, Extra-firm density closed cell silicone foam material is formulated to meet the requirements of FDA regulation 21 CFR 177.2600
M&P Sealing’s closed cell silicone foam gasket material is available in densities ranging from medium to an extra-firm density. Extra-firm density closed cell silicone foam can be converted into rolls ranging from as narrow as 1/4″ wide, up to 36″ in width. Available in Grey, the material has a smooth skin on both sides and can be manufactured to meet a wide range of standard and custom thicknesses. M&P Sealing has the capability to supply extra-firm density closed cell silicone foam material without adhesive or choose from either our standard acrylic adhesive or our high-temperature acrylic adhesive. M&P Sealing has the capacity to fabricate extra-firm density closed cell silicone foam by die-cutting or waterjet cutting to meet your requirements from the design stage through the production phase.
Specifications
UL 94 V-0 AND UL 94 HF-1
21 CFR 177.2600
| Physical Property | Test Method | Unit of Measure | Typical Values |
|---|---|---|---|
| DENSITY | ASTM D 3574 | pcf | 27 |
| COMPRESSION SET | ASTM D 1056 | % | <5 |
| COMPRESSION DEFLECTION | ASTM D 1056 | psi | 22 |
| TENSILE STRENGTH | ASTM D 412 | psi | 60 |
| ELONGATION | ASTM D 412 | % | 60 |
| THERMAL CONDUCTIVITY | ASTM C 518 | W/m.K | .84 |
| FLAME SPREAD INDEX | ASTM E 162 / D 3675 | N/A | <25 |
| SMOKE DENSITY (TESTED AT 4 MINUTES) (TESTED AT 1.5 MINUTES) |
ASTM E 662 | N/A | <50 <20 |
| TOXIC GAS EMISSIONS RATING | SMP-800C | N/A | PASS |
| WATER ABSORPTION* | INTERNAL: 24 HRS. AT ROOM TEMP. |
% | .20 |
| UV RESISTANCE | SAE-J-1960 | N/A | NO DEGRADATION |
| OZONE EFFECT RATING | ASTM D 1171 | N/A | 0 (NO CRACKS) |
| CORROSION RESISTANCE | AMS-3568 | N/A | PASS |
| DIELECTRIC CONSTANT | ASTM D 150 | 1 MHz | 1.58 |
| DIELECTRIC STRENGTH | ASTM D 150 | Volts/mil | 95 |
| DRY ARC RESISTANCE | ASTM D 495 | Seconds | 98 |
| VOLUME RESISTIVITY | ASTM D 257 | Ohms/cm | 10 |
| LOW TEMPERATURE FLEX AT -67°F (-55°C) |
ASTM D 1056 | N/A | PASS |
| LOW TEMPERATURE (RECOMMENDED) | SAE J-2236 | °F °C |
-67°F -55°C |
| HIGH TEMPERATURE (RECOMMENDED) | SAE J-2236 | °F °C |
392°F 200°C |
| HIGH INTERMITTENT TEMPERATURE (RECOMMENDED) | INTERNAL | °F °C |
482°F 250°C |
