Bellofram Closed Cell Silicone Sponge Products
Bellofram Silicones extruded closed cell silicone sponge profiles are used when difficult sealing problems require a combination of complex gasket shapes and extreme flexibility.
Our full in-house die-making capabilities allow us to produce cords, rectangles, tubes, and other complex geometries. Our in-house mixing provides a choice of materials with a wide compression deflection rating, ranging from ASTM D 1056 2D1 soft density to ASTM D 1056 2D5 extra firm density, with a temperature range of -85° to 400°F for continuous use.
The self-forming skin enhances the profile’s water absorption resistance. We are a certified supplier of BMS 1-23 and BMS 1-60 products. We offer a flame-retardant version in each density range to make sealing possible in extreme environments. A fully certified NSF/ANSI 51 version produced from FDA ingredients is available, in applications where FDA compliance is required. Bellofram Silicones extruded closed cell silicone sponge profiles are available in any color.
Closed Cell Silicone Sponge - Extruded
| MATERIAL PROPERTIES FOR CLOSED CELL SILICONE SPONGE EXTRUDED PRODUCTS | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| SPEC SHEET DOWNLOAD | COMPOUND | ASTM D 1056 DESIGNATION | COMPRESSION DEFLECTION (PSI) | HEAT AGE 22 hours @ 150° C | WATER ABSORPTION | COMPRESSION SET 22 hours @ +100°C | LOW-TEMPERATURE FLEX 5 hours @ -55°C | ||||||
 |
5104 | ASTM D 1056 2D1 | 2 - 5 | Change in Compression Deflection ±5% | 10% MAX | 30% max | PASS | ||||||
|
5204 | ASTM D 1056 2D2 | 5 - 9 | 27% max | PASS | ||||||||
|
5304 | ASTM D 1056 2D3 | 9 - 13 | 25% max | PASS | ||||||||
|
5404 | ASTM D 1056 2D4 | 13 - 17 | 25% max | PASS | ||||||||
|
5504 | ASTM D 1056 2D5 | 17 - 25 | 22% max | PASS | ||||||||
| MATERIAL PROPERTIES FOR FLAME RETARDANT SILICONE SPONGE EXTRUDED PRODUCTS | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| SPEC SHEET DOWNLOAD | COMPOUND | ASTM D 1056 DESIGNATION | COMPRESSION DEFLECTION (PSI) | HEAT AGE 22 hours @ +150° C | WATER ABSORPTION | COMPRESSION SET 22 hrs @ +100°C | LOW-TEMPERATURE FLEX 5 hours @ -55°C | MEETS BURN REQUIREMENTS OF UL 94 V-0 | |||||
|
5109 | ASTM D 1056 2D1 | 2 - 5 | Change in Compression Deflection ±5% | 10% MAX | 35% max | PASS | PASS | |||||
|
5209 | ASTM D 1056 2D2 | 5 - 9 | 35% max | PASS | PASS | |||||||
|
5309 | ASTM D 1056 2D3 | 9 - 13 | 35% max | PASS | PASS | |||||||
|
5409 | ASTM D 1056 2D4 | 13 - 17 | 35% max | PASS | PASS | |||||||
|
5509 | ASTM D 1056 2D5 | 17 - 25 | 35% max | PASS | PASS | |||||||
| MATERIAL PROPERTIES FOR NSF/ANSI 51 CERTIFIED SILICONE SPONGE EXTRUDED PRODUCTS | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| SPEC SHEET DOWNLOAD | COMPOUND | ASTM D 1056 DESIGNATION | COMPRESSION DEFLECTION (PSI) | HEAT AGE 22 hrs @ 150° C | WATER ABSORPTION | COMPRESSION SET 22 hrs @ +100°C | LOW-TEMPERATURE FLEX 5 hrs @ -55°C | NSF/ANSI 51 CERFIFIED | ||||
|
5104-NSF | ASTM D 1056 2D1 | 2 - 5 | Change in Compression Deflection ±5% | 10% MAX | 47% max | PASS | Yes | ||||
|
5204-NSF | ASTM D 1056 2D2 | 5 - 9 | 47% max | PASS | Yes | ||||||
|
5304-NSF | ASTM D 1056 2D3 | 9 - 13 | 58% max | PASS | Yes | ||||||
|
5404-NSF | ASTM D 1056 2D4 | 13 - 17 | 46% max | PASS | Yes | ||||||
|
5504-NSF | ASTM D 1056 2D5 | 17 - 25 | 42% max | PASS | Yes | ||||||
| BMS 1-60 CLOSED CELL SILICONE SPONGE | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| SPEC SHEET DOWNLOAD | COMPOUND | GRADE DESIGNATION | COLOR | COMPRESSION DEFLECTION (PSI) | DENSITY lb/ftᶟ, MAX | WATER ABSORPTION | COMPRESSION SET 22 hrs @ +212°F | ELONGATION %, MIN | FLAMMABILITY MAX | HIGH TEMPERATURE STABILITY 70 hrs @ +350°F | ||
|
5129-BMS | Grade A | Blue-Grey | 2 - 6 | 37 | 15% MAX | 35% MAX | 100% MAX | 15.0 seconds extinguish time 3.0 seconds drip extinguish time 4.0 inches maximum burn length | No evidence of cracking, charring, surface tackiness or other forms of degradation | ||
|
5329-BMS | Grade B | Blue-Grey | 6 - 12 | 44 | 10% MAX | ||||||
|
5529-BMS | Grade C | Blue-Grey | 12 - 22 | 53 | 10% MAX | ||||||
| BMS 1-23 CLOSED CELL SILICONE SPONGE | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| SPEC SHEET DOWNLOAD | COMPOUND | COMPRESSION DEFLECTION (PSI) | COMPRESSION SET 22 hrs @ 212°F | WATER ABSORPTION | CORROSION | HEAT AGE 72 hrs @ 350° F | ELONGATION %, MIN | |||||
|
5304-BMS | 6 - 14 | 35% MAX | 35% MAX | No Effect | Shrinkage 5% MAX Disintegration None | 150% MAX | |||||
Bellofram Closed Cell Silicone Sponge - Molded
| MATERIAL PROPERTIES FOR FDA COMPLIANT SILICONE SPONGE MOLDED PRODUCTS | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| SPEC SHEET DOWNLOAD | COMPOUND | ASTM D 1056 DESIGNATION | COMPRESSION DEFLECTION (PSI) | HEAT AGE 22 hrs @ +150° C | WATER ABSORPTION | COMPRESSION SET 22 hrs @ +100°C | LOW-TEMPERATURE FLEX, 5 hrs @ -55°C | |||||
|
7104 | ASTM D 1056 2D1 | 2 - 5 | Change in Compression Deflection ± 5% | 10% MAX | 80% max | PASS | |||||
|
7204 | ASTM D 1056 2D2 | 5 - 9 | 80% max | PASS | |||||||
|
7304 | ASTM D 1056 2D3 | 9 - 13 | 60% max | PASS | |||||||
|
7404 | ASTM D 1056 2D4 | 13 - 17 | 60% max | PASS | |||||||
|
7504 | ASTM D 1056 2D5 | 17 - 25 | 60% max | PASS | |||||||
| MATERIAL PROPERTIES FOR FLAME RETARDANT SILICONE SPONGE MOLDED PRODUCTS | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| SPEC SHEET DOWNLOAD | COMPOUND | ASTM D 1056 DESIGNATION | COMPRESSION DEFLECTION (PSI) | HEAT AGE, 22 hrs @ 150° C | WATER ABSORPTION | COMPRESSION SET, 22 hrs @ 100°C | LOW-TEMPERATURE FLEX, 5 hrs @ -55°C | MEETS BURN REQUIREMENTS OF UL 94 V-0 | ||||
|
7109 | ASTM D 1056 2D1 | 2 - 5 | Change in Compression Deflection ± 5% | 10% MAX | 34% | PASS | PASS | ||||
|
7209 | ASTM D 1056 2D2 | 5 - 9 | 35% | PASS | PASS | ||||||
|
7309 | ASTM D 1056 2D3 | 9 - 13 | 35% | PASS | PASS | ||||||
|
7409 | ASTM D 1056 2D4 | 13 - 17 | 32% | PASS | PASS | ||||||
|
7509 | ASTM D 1056 2D5 | 17 - 25 | 32% | PASS | PASS | ||||||
| MATERIAL PROPERTIES FOR NSF/ANSI 51 CERTIFIED SILICONE SPONGE MOLDED PRODUCTS | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| SPEC SHEET DOWNLOAD | COMPOUND | ASTM D 1056 DESIGNATION | COMPRESSION DEFLECTION (PSI) | HEAT AGE, 22 hrs @ 150° C | WATER ABSORPTION | COMPRESSION SET, 22 hrs @ 100°C | LOW-TEMPERATURE FLEX, 5 hrs @ -55°C | NSF/ ANSI 51 Certified | ||||
|
7104-NSF | ASTM D 1056 2D1 | 2 - 5 | Change in Compression Deflection ± 5% | 10% MAX | 42% | PASS | YES | ||||
|
7204-NSF | ASTM D 1056 2D2 | 5 - 9 | 38% | PASS | YES | ||||||
|
7304-NSF | ASTM D 1056 2D3 | 9 - 13 | 19% | PASS | YES | ||||||
|
7404-NSF | ASTM D 1056 2D4 | 13 - 17 | 16% | PASS | YES | ||||||
|
7504-NSF | ASTM D 1056 2D5 | 17 - 25 | 23% | PASS | YES | ||||||
| BMS 1-60 CLOSED CELL SILICONE SPONGE | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| SPEC SHEET DOWNLOAD | COMPOUND | GRADE DESIGNATION | COLOR | COMPRESSION DEFLECTION (PSI) | DENSITY lb/ftᶟ, MAX | WATER ABSORPTION | COMPRESSION SET, 22hrs @ 212°F | ELONGATION %, MIN | FLAMMABILITY MAX | HIGH TEMPERATURE STABILITY 70 hrs @ 350°F | ||
|
7129-BMS | Grade A | Blue-Grey | 2 - 6 | 37 | 15% MAX | 35% MAX | 100% MAX | 15.0 seconds extinguish time 3.0 seconds drip extinguish time 4.0 inches maximum burn length | No evidence of cracking, charring, surface tackiness or other forms of degradation | ||
|
7329-BMS | Grade B | Blue-Grey | 6 - 12 | 44 | 10% MAX | ||||||
|
7529-BMS | Grade C | Blue-Grey | 12 - 22 | 53 | 10% MAX | ||||||
| BMS 1-23 CLOSED CELL SILICONE SPONGE | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| SPEC SHEET DOWNLOAD | COMPOUND | COMPRESSION DEFLECTION (PSI) | COMPRESSION SET, 22 hrs @ 212°F | WATER ABSORPTION | CORROSION | HEAT AGE, 72 hrs @ 350° F | ELONGATION %, MIN | |||||
|
7304-BMS | 6 - 14 | 35% MAX | 10% MAX | No Effect | Shrinkage 5% MAX Disintegration None | 150% MAX | |||||