Vulcanized Silicone Ring Gaskets
Closed ring gaskets manufactured from extruded silicone cords and vulcanized by thermal or chemical bonding. Available in solid or sponge silicone, certified FDA, EC 1935/2004, UL94, EN 45545-2, USP VI, and ISO 10993. Manufacturing under ISO 9001 and ISO 13485.
Process Principle
Vulcanized ring gaskets are made by joining the ends of a silicone cord using thermal or chemical vulcanization, creating a continuous, leak-proof ring. They allow for customized gaskets without the need for molds.
Materials and Formulations
Available in solid or sponge VMQ silicone with hardnesses from 10 to 90 Shore A. Certified food-grade, medical-grade, fire-retardant, antistatic, high-temperature, and fluorinated (FVMQ) formulations. Compliant with FDA, EC 1935/2004, UL94, EN 45545-2, USP VI, and ISO 10993.
Dimensions and Finishes
Cord diameters from 1 to 50 mm and perimeters adapted to the technical drawing. Tolerances according to ISO 3302-1 E2/E3. Invisible joints or with internal reinforcement depending on the application. Available in smooth, satin, or colored finishes.
Production Environments
Production in an industrial environment or ISO 8 cleanroom depending on the destination. Processes certified ISO 9001 and ISO 13485 with dimensional control, adhesion testing, and sealing validation.
Product Gallery
Key Technical Data
Typical values obtained according to series datasheets and indicated standards. May vary based on hardness, formulation, and raw material. Final validation is the customer's responsibility.
| Property | Typical Values | Standard |
|---|---|---|
| Hardness (Shore A) | 20 – 90 | ISO 7619-1 |
| Tensile Strength | 6 – 12 MPa | ISO 37 |
| Elongation at Break | 200 – 600 % | ISO 37 |
| Tear Resistance | 15 – 30 kN/m | ISO 34-1 |
| Density | 1,11 – 1,20 g/cm³ | ISO 2781 |
| Working Temperature | –60…+250 °C | — |
| Tolerances | Extrusión E1–E3 · Longitudes L2–L3 | ISO 3302-1/-2 |
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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Doors and covers with circular closing
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Vacuum and pressurisation systems
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Seals for ovens, autoclaves, and reactors
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Gaskets for lids, valves, or pumps
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Rapid replacement for standard O-rings
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Sealing gaskets for large-diameter cartridge filters
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Sealing rings in industrial gearboxes
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Gaskets for inspection lids on large-diameter pipework
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Sealing for flange joints in hot air systems
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Gasket rings for inspection windows in textile machinery
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Gaskets for high-performance liquid chromatography (HPLC) equipment
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Sealing for tank and silo discharge valves
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Circular gaskets for cleaning heads in brewery tanks
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Sealing rings in large-diameter pneumatic cylinder pistons
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Gaskets for electrolysis cell lids
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Sealing for mixer domes in the cosmetics industry
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Seat gaskets in high-temperature ball valves
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Sealing rings for rotors of abrasive liquid pumps
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Sealing for air filters in gas turbines
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Gaskets for purge connections in steam systems
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Rings for electric vehicle battery lids
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Sealing for timber drying kiln doors
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Gaskets for industrial fogging and humidification systems
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Retaining rings for rotating shafts in convection ovens
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Gaskets for lids of small pressure vessels
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Circular gaskets for lids of professional appliances (distillers/mixers) in molecular gastronomy
Manufacturing and Delivery Options
- Materials: Solid or sponge VMQ
- Diameters: 1 to 50 mm
- Formulations: Food-grade, Medical-grade, Fire-retardant, Antistatic, High-temperature, FVMQ
- Colors: Translucent, white, black, grey, red, or custom RAL
- Production: Industrial or ISO 8 Cleanroom
- Delivery: Closed, tested, and traced gaskets
- Entrega: juntas cerradas, ensayadas y trazadas
Product Selection Matrix
| Customer Requirement | Recommended Solution |
|---|---|
| Continuous or extruded cords | Solid Cord |
| Sponge or lightweight cords | Sponge/Foam Cord |
| Inflatable seals | TIXAN'AIR® Inflatable Seals |
| Closed gaskets per drawing | Juntas vulcanizadas en aro |
| Juntas cerradas bajo plano | Juntas vulcanizadas en aro |
Technical Conclusion and Recommendations
The vulcanized ring gaskets from ProSilicones64 offer continuous sealing, dimensional accuracy, and high durability without the need for molds.
Certified according to FDA, EC 1935/2004, UL94, EN 45545-2, USP VI, and ISO 10993, and manufactured under ISO 9001 and ISO 13485, ensuring reliability in industrial and sanitary environments.
A flexible and economical alternative to standard O-rings for equipment, ovens, and vacuum or pressure systems.
Una alternativa flexible y económica a las tóricas estándar para equipos, hornos y sistemas de vacío o presión.
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