Sponge Silicone Cords (Cellular)
Extruded sponge silicone cords with a closed-cell structure. Low density, high compressibility, and elastic recovery. Compliance with FDA, EC 1935/2004, EN 45545-2, UL94, USP VI, and ISO 10993. Production under ISO 9001 and ISO 13485.
Process Principle
Sponge silicone cords are obtained by extruding expanded VMQ silicone compounds, generating a closed-cell structure that combines lightness, insulation, and elasticity.
Materials and Formulations
Made from cellular VMQ silicone with densities between 0.25 and 0.6 g/cm³. Certified food-grade, medical-grade, fire-retardant, antistatic, and high-temperature formulations. Compliant with FDA, EC 1935/2004, UL94, EN 45545-2, USP VI, and ISO 10993.
Dimensions and Finishes
Diameters from 2 to 40 mm. Tolerances according to ISO 3302-1 E3. Uniform surface, soft touch, and translucent, white, grey, or custom RAL color. Available in cut lengths or vulcanized rings.
Production Environments
Controlled production in an industrial environment or an ISO 8 cleanroom for the medical and food sectors. Manufacturing certified ISO 9001 and ISO 13485 with density, compression, and elastic recovery control.
Product Gallery
Key Technical Data
Typical values obtained according to series datasheets and indicated standards. May vary based on density, hardness, and formulation. Final validation is the customer's responsibility.
| Property | Typical Values | Standard |
|---|---|---|
| Hardness (Shore 00) | 35 – 80 | ISO 7619-1 |
| Compression Set | ≤ 35 % | ISO 815-1 |
| Elongation at Break | 200 – 400 % | ISO 37 |
| Density | 0,16 – 0,53 g/cm³ | ISO 845 |
| Working Temperature | –60…+200 °C | — |
| Tolerances | Extrusion E2–E3 | ISO 3302-1 |
| Sectoral (On Request) | EN 45545-2 / FDA / CE 1935/2004 / BfR / RoHS / REACH | — |
Certifications and Regulatory Compliance in Silicone Extrusion
Every extrusion process is backed by international certifications that guarantee traceability, safety, and regulatory conformity in highly demanding sectors.
Main Certifications
- ISO 9001:2015 – Quality Management
- ISO 13485:2016 – Medical Devices
- EN 9100 – Aerospace
- GMP – Good Manufacturing Practices
- Validated ISO 8 Cleanroom (550 m², ISO 14644-1 to -7)
Regulatory Compliance
- FDA 21 CFR 177.2600 – Food Contact
- EC 1935/2004 – Materials in Contact with Food
- EN 45545-2 – Railway Fire Protection
- UL94 – Material Flammability
- ISO 10993 and USP Class VI – Medical and Pharmaceutical Biocompatibility
- REACH (1907/2006) and RoHS (2015/863) – Chemical and Electrical Substances
Main Application Sectors
Key Applications
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Soft seals or tolerance compensators
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Thermal or vibrational insulation
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Protection against impact or compression
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Lightweight and flexible continuous profiles
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Splices or closed ring gaskets
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Thermal insulation in high-end industrial refrigerator doors
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Gasket for fire-resistant cabinet lids (UL94)
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Sealing and cushioning in acoustic cabin panels
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Tolerance compensation in sheet metal assemblies
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Perimeter insulation in skylights and roof windows
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Soft gasket for train maintenance hatches (EN 45545-2)
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Sealing of glazing in laboratory equipment
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Cushioning profile in sensitive equipment cases (electronics)
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Insulation in industrial air conditioning ducts (HVAC)
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Expansion joints in prefabricated structures
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Closure seal for incubators and culture equipment
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Anti-vibration gasket in low-power motors and turbines
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Filling profile in building construction joints
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Sealing for access lids to outdoor electrical panels
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Cushioning in assisted door opening systems
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Insulation in thermal test chambers
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Sealing gasket in ozonation and air purification equipment
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Support profile in composite mould manufacturing
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Soft seal for closure devices in textile machinery
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Thermal insulation in low-pressure steam lines
Manufacturing and Delivery Options
- Diameters: 2 to 40 mm
- Materials: Cellular VMQ silicone (cellular foam)
- Formulations: Food-grade, Medical-grade, Fire-retardant, Antistatic, High-temperature
- Colors: Translucent, white, grey, or custom RAL
- Production: Industrial or ISO 8 Cleanroom
- Delivery: In rolls, cut lengths, or vulcanized rings
- Entrega: en rollos, tramos cortados o vulcanizados en aro
Product Selection Matrix
| Customer Requirement | Recommended Solution |
|---|---|
| Soft and lightweight seals | Sponge/Foam Cord |
| Dense and precise cords | Solid Cord |
| Inflatable or dynamic seals | TIXAN'AIR® Inflatable Seals |
| Closed ring gaskets | Juntas vulcanizadas en aro |
| Juntas cerradas en aro | Juntas vulcanizadas en aro |
Technical Conclusion and Recommendations
The sponge silicone cords from ProSilicones64 combine lightness, compressibility, and sealing performance with exceptional thermal resistance.
Manufactured under ISO 9001 and ISO 13485 and certified to FDA, EC 1935/2004, UL94, EN 45545-2, USP VI, and ISO 10993, ensuring performance in demanding environments.
An ideal option for flexible and hygienic seals in the medical, food, and general industries.
Una opción ideal para sellados flexibles e higiénicos.
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