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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.

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
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

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
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

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
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

COMPOUND GRADE DESIGNATION COLOR COMPRESSION DEFLECTION (PSI) DENSITY lb/ft3, 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

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 Silicone Closed Cell Silicone Sponge Molded Products

We are one of a very small number of closed cell silicone sponge molded elastomer manufacturers. Our own in-house mixing offers a material selection with a wide compression deflection rating, from ASTM D 1056 2D1 soft density to ASTM D 1056 2D5 extra firm density, and a temperature range of -85° to 400°F for continuous use.

The self-forming skin enhances product resistance to water absorption and protects from contaminants. We are 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. A fully certified NSF/ANSI 51 version produced from FDA ingredients is available for applications requiring FDA compliance. Available in any color.

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% max PASS PASS
7309 ASTM D 1056 2D3 9 - 13 35% max PASS PASS
7409 ASTM D 1056 2D4 13 - 17 32% max PASS PASS
7509 ASTM D 1056 2D5 17 - 25 32% max 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% max PASS Yes
7204-NSF ASTM D 1056 2D2 5 - 9 38% max PASS Yes
7304-NSF ASTM D 1056 2D3 9 - 13 19% max PASS Yes
7404-NSF ASTM D 1056 2D4 13 - 17 16% max PASS Yes
7504-NSF ASTM D 1056 2D5 17 - 25 23% max PASS Yes

BMS 1-60 Closed Cell Silicone Sponge

COMPOUND GRADE DESIGNATION COLOR COMPRESSION DEFLECTION (PSI) DENSITY lb/ft3, MAX WATER ABSORPTION COMPRESSION SET 22 hrs @ +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

Bellofram Dense (Solid Silicone) Extruded Products

With expertise in custom formulations and toolmaking, Bellofram Silicones produces solid silicone elastomer extrusions in almost limitless shapes and hardnesses in diameters up to 2.500”. Our extruded rubber cords, tubes, and custom profiles are used to make gaskets, seals, O-rings, and grips and handles that ensure worker safety when operating hoses and nozzles. Larger diameter rubber extrusions are popular choices as bumpers and guards for equipment protection.

We offer solid silicone rubber extruded materials that can withstand 500,000 flexes, and commercial-grade silicones that are maintenance-free in less-demanding environments. A fully approved NSF 51 version produced with FDA ingredients is also available, in applications where FDA compliance is required. Bellofram Silicones solid extruded products are highly resistant to compression set and extreme temperatures.

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

Material Properties of Bellofram High Tear and Flex Resistant Solid Silicones Extruded Products

SOLID SILICONE EXTRUDED PRODUCTS TO SPEC TO SPEC A-A- 59588 CL3B, GR30, GR50 ASTM D395 HEAT AGE 70 hrs @ 200°C (ASTM D573) ASTM D2137 ASTM D471 ASTM D813 ASTM D2632
COMPOUND MODEL DUROMETER, SHORE "A" TENSILE STRENGTH min MPa (psi) ELONGATION % min. TEAR RESISTANCE, kN/m (ppi) COMPRESSION SET, 70 hrs @ +100°C HARDNESS CHANGE TENSILE CHANGE ELONGATION CHANGE BRITTLE POINT, min. °C (°F) WATER IMMERSION, VOLUME CHANGE % DeMATTIA FLEX, (1/2 inch max crack growth) IMPACT RESILIENCE, min %
6305 30 ± 5 6.9 (1000) 500 26.25 (150) 25 ± 5 -20% -35% -70 (-94) +5 500,000 cycles 40
6505 50 ± 5 8.28 (1200) 500 26.25 (150) 20 ± 10 -25% -30% -70 (-94) +5 140,000 cycles 45

Material Properties of Bellofram Solid Silicone Extruded Products

COMPOUND MODEL ASTM D2000-08 DESIGNATION DUROMETER SHORE "A" TENSILE (PSI) HEAT AGE, 70 hrs @ +225 °C OIL IMMERSION IRM 903 70 hrs @+150 °C COMPRESSION SET, 22 hrs @ +175°C
6304 ASTM D2000 M1GE305 30 ± 5 1175 Change in Tensile Strength, ±30%
Change in Elongation, -50%
Change in Durometer, ±15 pts		 Volume change, +63% 28%
6404 ASTM D2000 M1GE405 40 ± 5 1150 Volume change, +61% 42%
6504 ASTM D2000 M1GE505 50 ± 5 930 Volume change, +59% 61%
6604 ASTM D2000 M1GE605 60 ± 5 925 Volume change, +46% 33%
6704 ASTM D2000 M1GE705 70 ± 5 820 Volume change, +41% 42%
6804 ASTM D2000 M1GE805 80 ± 5 810 Volume change, +35% 40%

Material Properties of Bellofram Flame Retardant Solid Silicone Extruded Products

COMPOUND MODEL ASTM D2000-08 DESIGNATION DUROMETER SHORE "A" TENSILE MPa (PSI) HEAT AGE, 70 hrs @ +225 °C OIL IMMERSION IRM 903 70 hrs @+150 °C COMPRESSION SET, 22 hrs @ +175°C MEETS BURN REQUIREMENTS OF UL 94 V-0
6309 ASTM D2000 M1GE305 30 ± 5 5 ( 725 ) Change in Tensile Strength, ±30%
Change in Elongation, -50%
Change in Durometer, ±15 pts		 Volume change, +80% 50% max PASS
6409 ASTM D2000 M1GE405 40 ± 5 50% max PASS
6509 ASTM D2000 M1GE505 50 ± 5 70% max PASS
6609 ASTM D2000 M1GE605 60 ± 5 70% max PASS
6709 ASTM D2000 M1GE705 70 ± 5 50% max PASS
6809 ASTM D2000 M1GE805 80 ± 5 50% max PASS

Material Properties of Bellofram NSF/ANSI 51 Certified Solid Silicone Extruded Products

COMPOUND MODEL ASTM D2000-08 DESIGNATION DUROMETER SHORE "A" TENSILE (PSI) HEAT AGE, 70 hrs @ +225 °C OIL IMMERSION IRM 903 70 hrs @+150 °C COMPRESSION SET, 22 hrs @ +175°C NSF/ANSI 51 CERTIFIED
6304-NSF ASTM D2000 M1GE305 30 ± 5 1175 Change in Tensile Strength, ±30%
Change in Elongation, -50%
Change in Durometer, ±15 pts		 Volume change, +63% 28% Yes
6404-NSF ASTM D2000 M1GE405 40 ± 5 1150 Volume change, +61% 42% Yes
6504-NSF ASTM D2000 M1GE505 50 ± 5 930 Volume change, +59% 61% Yes
6604-NSF ASTM D2000 M1GE605 60 ± 5 925 Volume change, +46% 33% Yes
6704-NSF ASTM D2000 M1GE705 70 ± 5 820 Volume change, +41% 42% Yes
6804-NSF ASTM D2000 M1GE805 80 ± 5 810 Volume change, +35% 40% Yes

Bellofram Silicone Solid Molded Products

Molded products from Bellofram Silicones offer solid silicone construction, available in 30 to 80 shore “A” durometer. Material choices range from economical commercial grade to high-performance low-temperature, and flex- and tear-resistant grades. They can be tinted to most colors.

Our in-house mixing of custom formulations allow us to produce solid silicone molded products to confirm to ASTM, SAE, MIL-STD, and other military and industrial specifications. A fully approved NSF 51 version produced with FDA ingredients is also available, in applications where FDA compliance is required. For rush jobs, we can match one of our compounds with a profile of your design to find a quick solution to even your most complex sealing needs.

SOLID SILICONE MOLDED PRODUCTS TO SPEC TO SPEC A-A-59588 CL3B, GR30, GR50 ASTM D395 HEAT AGE 70 hrs @ +200° C (ASTM D573) ASTM D2137 ASTM D471 ASTM D813 ASTM D2632
COMPOUND MODEL DUROMETER, SHORE "A" TENSILE STRENGTH min MPa (psi) ELONGATION % min. TEAR RESISTANCE, kN/m (ppi) COMPRESSION SET, 70 hrs @ +100°C HARDNESS CHANGE TENSILE CHANGE ELONGATION CHANGE BRITTLE POINT, min. °C (°F) WATER IMMERSION, VOLUME CHANGE % DeMATTIA FLEX, (1/2 inch max crack growth) IMPACT RESILIENCE, min %
8305 30 ± 5 6.9 (1000) 500 26.25 (150) 25 ± 5 -20% -35% -70 (-94) +5 500,000 cycles 40
8505 50 ± 5 8.28 (1200) 500 26.25 (150) 20 ± 10 -25% -30% -70 (-94) +5 140,000 cycles 45

Material Properties of Bellofram Silicones Solid Silicone Molded Products

COMPOUND MODEL ASTM D2000-08 DESIGNATION DUROMETER SHORE "A" TENSILE (PSI) HEAT AGE, 70 hrs @ +225 °C OIL IMMERSION IRM 903 70 hrs @+150 °C COMPRESSION SET, 22 hrs @ +175°C
8304 ASTM D2000 M1GE305 30 ± 5 1350 Change in Tensile Strength, ±30%
Change in Elongation, -50%
Change in Durometer, ±15 pts		 Volume change, +64% 14%
8404 ASTM D2000 M1GE405 40 ± 5 1235 Volume change, +62% 16%
8504 ASTM D2000 M1GE505 50 ± 5 1100 Volume change, +49% 18%
8604 ASTM D2000 M1GE605 60 ± 5 725 Volume change, +47% 26%
8704 ASTM D2000 M1GE705 70 ± 5 900 Volume change, +38% 28%
8804 ASTM D2000 M1GE805 80 ± 5 1000 Volume change, +30% 23%

Material Properties of Bellofram SFlame Retardant Solid Silicone Molded Products

COMPOUND MODEL ASTM D2000-08 DESIGNATION DUROMETER SHORE "A" TENSILE (PSI) HEAT AGE, 70 hrs @ +225 °C OIL IMMERSION IRM 903 70 hrs @+150 °C COMPRESSION SET, 22 hrs @ +175°C MEETS BURN REQUIREMENTS OF UL 94 V-0
8309 ASTM D2000 M1GE305 30 ± 5 1350 Change in Tensile Strength, ±30% Change in Elongation, -50% Change in Durometer, ±15 pts Volume change, +64% 14% PASS
8409 ASTM D2000 M1GE405 40 ± 5 1235 Volume change, +62% 16% PASS
8509 ASTM D2000 M1GE505 50 ± 5 1100 Volume change, +49% 18% PASS
8609 ASTM D2000 M1GE605 60 ± 5 725 Volume change, +47% 26% PASS
8709 ASTM D2000 M1GE705 70 ± 5 900 Volume change, +38% 28% PASS
8809 ASTM D2000 M1GE805 80 ± 5 1000 Volume change, +30% 23% PASS

Material Properties of Bellofram NSF/ANSI 51 Compliant Solid Silicone Molded Product

COMPOUND MODEL ASTM D2000-08 DESIGNATION DUROMETER SHORE "A" TENSILE (PSI) HEAT AGE, 70 hrs @ +225 °C OIL IMMERSION IRM 903 70 hrs @+150 °C COMPRESSION SET, 22 hrs @ +175°C NSF/ANSI 51 CERTIFIED
8304-NSF ASTM D2000 M1GE305 30 ± 5 1350 Change in Tensile Strength, ±30%
Change in Elongation, -50%
Change in Durometer, ±15 pts		 Volume change, +64% 14% Yes
8404-NSF ASTM D2000 M1GE405 40 ± 5 1235 Volume change, +62% 16% Yes
8504-NSF ASTM D2000 M1GE505 50 ± 5 1100 Volume change, +49% 18% Yes
8604-NSF ASTM D2000 M1GE605 60 ± 5 725 Volume change, +47% 26% Yes
8704-NSF ASTM D2000 M1GE705 70 ± 5 900 Volume change, +38% 28% Yes
8804-NSF ASTM D2000 M1GE805 80 ± 5 1000 Volume change, +30% 23% Yes

Bellofoam™ Closed Cell Silicone Sponge Rubber Sheeting

BELLOFOAM™ MATERIAL TYPE COLOR COMPRESSION DEFLECTION (PSI) ASTM D-1056 COMPRESSION SET ASTM D-1056 DENSITY (LBS/FT3) ASTM D-1056 WATER ABSORPTION ASTM D-1056 FLAMMABILITY FMVSS302 TEMPERATURE RANGE (F°) MATERIAL SPECIFICATIONS
7605 ALL 0 to 2 6% 10 MAX 10% MAX PASS -85° to +400° ASTM D-1056 2D0
7604 ALL 2 to 5 6% 12 MAX 10% MAX PASS -85° to +400° ASTM D-1056 2D1
7704 ALL 5 to 9 6% 20 MAX 10% MAX PASS -85° to +400° ASTM D-1056 2D2
7804 ALL 9 to 13 4% 30 MAX 10% MAX PASS -85° to +400° ASTM D-1056 2D3 MIL-R-46089 GRADE M ASTM-D 1056 2D3 AMS 3195 BMS 1 -23
7629 GREY ONLY 0 to 5 25% 12 MAX 10% MAX PASS -85° to +400° ASTM D-1056 2D0, 2D1 UL 94, V-0

Bellofoam™ Closed Cell Fluorosilicone (FVM) Sponge Sheeting

MATERIAL COLOR CLASS DESIGNATION AMS 3323 COMPRESSION DEFLECTION (PSI) ASTM D-1056 COMPRESSION SET ASTM D-1056 DENSITY (LBS/IN3) ASTM D-1056 FLUID RESISTANCE ASTM D 471 (FUEL B) TEMPERATURE RANGE (F°) MATERIAL SPECIFICATIONS
7748 LIGHT BLUE ONLY CLASS 1 2 - 9 25% MAX 0.025 MAX WEIGHT CHANGE MAXIMUM 0 - 50% -85° to +400° AMS3323 SAE AMS3323 MIL-R-6130 Type 2, Grade A,B,and C (excluding paragraph 4.5.7 Flame Resistance) ASTM D6576 Type 2, Grade A,B, and C (excluding paragraph 15 Flame Resistance)