300mm ID to 450mm ID / 12" to 18" ID
Silicone 70 Durometer Vulcanized O-Rings – Custom Sizes for High-Performance Sealing
For applications requiring extreme temperature resistance and flexibility, Silicone 70 Durometer Vulcanized O-Rings from The O-Ring Store LLC offer a premium sealing solution. These O-Rings are custom-made by splicing and vulcanizing extruded silicone cord, providing a seamless, high-quality finish with reliable performance in a wide range of conditions.
Olypsys® Measurement Verification & Quality Assurance
Every vulcanized O-Ring we produce includes a certified Olypsys® Measurement Verification Report, verifying exact ID, OD, and cross-section accuracy for traceable quality assurance. This process ensures precision, trust, and reliability in every seal we manufacture. Customers can rely on our Olypsys-certified measurement data as part of our ISO9001:2015 quality system, reinforcing confidence in every order.
Current Lead Times
Dependent on cord stock availability
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Up to 24 O-Rings: Current Lead Time ~2–5 Days ARO
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25–100 O-Rings: Current Lead Time ~5–10 Days ARO
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100+ O-Rings: Current Lead Time ~10–15 Days ARO
Key Features & Benefits
Custom Sizes and Flexible Solutions
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Manufactured to your exact inner diameter (ID) and cross-section specifications.
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Available in inch and metric sizes to ensure a precise fit.
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Ideal for oversized, non-standard, or hard-to-find O-Ring sizes.
High-Quality Vulcanization Process
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Made from Silicone 70-durometer cord, spliced and vulcanized for seamless performance.
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Olypsys® Large Format Grid inspection for accuracy on sizes under 48".
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Provides excellent resilience, flexibility, and long-term sealing stability.
Temperature and Environmental Resistance
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Temperature Range: -75°F to +450°F (-59°C to +232°C), ideal for high-heat and freezing environments.
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Excellent UV, ozone, and weathering resistance, making it perfect for outdoor applications.
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Maintains elasticity and sealing integrity over long periods.
Superior Chemical Resistance
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Resists water, steam, and many chemicals including mild acids and bases.
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Compatible with silicone-based lubricants and some fuels.
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Not recommended for petroleum-based oils, fuels, or solvents.
Application Flexibility
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Dynamic and static sealing for diverse applications.
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Used in automotive, aerospace, food processing, pharmaceutical, and medical industries.
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Great for high-purity applications requiring FDA-compliant materials.
Applications
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Aerospace & Automotive: High-temperature sealing for engines, fuel systems, and avionics.
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Medical & Pharmaceutical: Sterile environments requiring chemically inert seals.
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Food & Beverage Processing: FDA-compliant sealing in food production equipment.
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Electronics & Electrical: Protective gaskets for sensitive components.
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Industrial & Outdoor Equipment: UV-resistant seals for long-term performance.
Limitations
While Silicone 70 Durometer Vulcanized O-Rings offer exceptional versatility, they are not recommended for:
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Petroleum-based oils, fuels, or solvents (use Buna-N or FKM instead).
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High-wear dynamic applications (Silicone has lower tear resistance compared to other elastomers).
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Strong acids and alkalis beyond mild chemical exposure.
Technical Specifications
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Property
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Value
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Material
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Silicone (VMQ)
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Durometer (Hardness)
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70 Shore A
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Temperature Range
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-75°F to +450°F (-59°C to +232°C)
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Tensile Strength
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Moderate, suitable for static applications
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Compression Set
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Low, ensuring long-lasting performance
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UV & Ozone Resistance
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Excellent, ideal for outdoor use
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Chemical Resistance
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Good for water, mild acids, and bases
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Why Choose The O-Ring Store LLC?
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Expert Technical Support – Assistance with sizing, material selection, and application requirements.
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Custom Sizing Made Simple – No need to wait for molded sizes—our vulcanized O-Rings provide fast, accurate results.
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Precision Quality Control – Olypsys® Large Format Grid ensures accuracy for sizes under 48".
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Fast Turnaround Times – Get your O-Rings when you need them, without long lead times.
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Sustainability Focused – Custom sizing reduces material waste and improves efficiency.
Experience the Difference
At The O-Ring Store LLC, we make getting Silicone 70 Durometer Vulcanized O-Rings easy. Whether you need a single custom O-Ring or a bulk order, we provide high-quality sealing solutions tailored to your specific application.
Order today or contact us for a quote! Let us help you solve your sealing challenges with precision, performance, and personalized service.
