Bellofram Closed Cell Silicone Sponge Molded Elastomer Products

Bellofram Silicones is one of a very small number of closed cell silicone sponge molded elastomer manufacturers. Our own in-house mixing gives you the choice of materials with a wide compression deflection rating, from ASTM D 1056 2D1 soft density to ASTM D 1056 2D5 extra firm density. The self-forming skin enhances product resistance to water absorption and protects from contaminants. A fully approved NSF 51 version produced with FDA ingredients is also available, in applications where FDA compliance is required. Need to meet a BMS requirement? No problem! Bellofram is a certified supplier of BMS 1-23 and BMS 1-60 molded products. We offer a flame retardant version in each density range that will make sealing possible in extreme environments. Our Bellofram Silicones closed cell silicone sponge elastomer products are also available in any color, to aide to the aesthetics of your assembly.

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MATERIAL PROPERTIES FOR FDA COMPLIANT SILICONE SPONGE MOLDED PRODUCTS
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
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
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
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
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