Bellofram Closed Cell Silicone Sponge Extrusion 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 any 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. The self-forming skin enhances the profile’s water absorption resistance. Need to meet a BMS requirement? No problem! Bellofram Silicones is a certified supplier of BMS 1-23 and BMS 1-60 products. We offer a flame retardant version in each density range that will make sealing possible in extreme environments. A fully approved NSF 51 version produced with FDA ingredients is also available, in applications where FDA compliance is required. Our Bellofram Silicones extruded closed cell silicone sponge profiles are available in any color to aide to the aesthetics of your assembly.
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MATERIAL PROPERTIES FOR CLOSED CELL SILICONE SPONGE EXTRUDED PRODUCTS | ||||||||||||
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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 |
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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 |
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MATERIAL PROPERTIES FOR FLAME RETARDANT SILICONE SPONGE EXTRUDED PRODUCTS | ||||||||||||
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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 |
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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 |
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MATERIAL PROPERTIES FOR NSF/ANSI 51 CERTIFIED SILICONE SPONGE EXTRUDED PRODUCTS | ||||||||||||
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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 |
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BMS 1-60 CLOSED CELL SILICONE SPONGE | ||||||||||||
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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 |
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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 |
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BMS 1-23 CLOSED CELL SILICONE SPONGE | ||||||||||||
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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 |