ZSR Silicone is a leading custom silicone O-rings manufacturer since 2007, specializing in molded silicone seals and FDA/Food-grade VMQ O-rings. We supply a full range of standard sizes—including AS568, ISO 3601, JIS B 2401, BS 1806, and DIN 3771—along with flexible custom sizing and rapid prototyping with No MOQ. Contact us today to get a free quote!
Rubber Articles Intended for Repeated Use
EU Food Contact Materials
Biocompatibility of Medical Devices
Environmental Compliance
Flammability of Plastic Materials
| Image | Product | Type | Short Info | Action |
|---|---|---|---|---|
 | ISO 3601 Metric Silicone O-Rings | Standard & Size | Metric silicone O-rings manufactured to ISO 3601 dimensions. Fits international equipment groove standards. | View Details |
 | ISO 6149 Metric Silicone O-Rings | Standard & Size | Metric O-rings designed for hydraulic and pneumatic fluid power sealing applications under ISO 6149 standards. | View Details |
 | BS 1806 Silicone O-rings | Standard & Size | British Standard inch-size silicone O-rings. Common in UK and Commonwealth industrial equipment. | View Details |
 | DIN 3771 Silicone O-rings | Standard & Size | German metric standard O-rings for hydraulic and pneumatic sealing in European machinery. | View Details |
 | Custom Molded Silicone O-rings | Standard & Size | Custom-shaped silicone O-rings molded to your exact drawing or sample. No standard size limitations. | View Details |
 | AS568 Silicone O-rings | Standard & Size | Inch-size silicone O-rings that follow the AS568 standard. Widely used in North American machinery and hydraulic systems. | View Details |
 | AN6227 Silicone O-rings | Standard & Size | Aerospace-standard O-rings with small cross-section. Used in aviation and military-grade sealing. | View Details |
 | AN6230 Silicone O-rings | Standard & Size | Aerospace-standard O-rings specified under AN6230 for aviation and military-grade sealing. | View Details |
 | JIS B2401 Silicone O-Ring | Standard & Size | Japanese industrial standard O-rings commonly used in Asian-manufactured machinery and automotive equipment. | View Details |
 | FDA Food Grade Silicone O-Rings | Grade | Food-safe silicone O-rings compliant with FDA regulations. Safe for repeated food contact. | View Details |
 | Industrial Grade Silicone O-ring | Grade | General-purpose silicone O-rings for industrial sealing. Cost-effective with reliable performance. | View Details |
 | Medical Grade Silicone O-ring | Grade | Biocompatible silicone O-rings for medical devices. Passes USP Class VI and supports sterilization. | View Details |
 | Oil-Resistant / Fuel-Resistant Silicone O-Rings | Special Function | Modified silicone O-rings that resist swelling in oils, fuels and petroleum-based fluids. | View Details |
 | Metal Detectable Silicone O-Rings | Special Function | Food-safe silicone O-rings with metal-detectable additives. Protects production lines from contamination. | View Details |
 | High Temperature / Heat Resistant Silicone O-Rings | Special Function | Silicone O-rings that stay flexible at temperatures above 200°C. For ovens, engines and furnaces. | View Details |
 | VMQ Silicone O-Rings | Materials | Heat and cold-resistant silicone O-rings for food, medical, automotive, and industrial applications. | View Details |
 | Fiberglass Reinforced Silicone O-rings | Materials | High-strength silicone O-rings reinforced with fiberglass fabric. Withstands extreme heat and pressure. | View Details |
 | HCR / HTV / Solid Silicone Rubber O-rings | Materials | Durable solid silicone rubber O-rings made by compression molding. The standard choice for general sealing. | View Details |
 | Liquid Silicone Rubber (LSR) O-rings | Materials | Injection-molded liquid silicone rubber O-rings with tight tolerances and clean surfaces. Ideal for high-volume production. | View Details |
 | Platinum Cured Silicone O-rings | Materials | Ultra-clean silicone O-rings cured with platinum catalyst. Lower extractables for food and medical use. | View Details |
 | Fluorosilicone (FVMQ) O-rings | Materials | Fuel and oil-resistant silicone O-rings for aerospace, automotive and chemical applications. | View Details |
 | Transparent / Clear Silicone O-rings | Color | See-through silicone O-rings for visual inspection and clean-looking medical or food equipment. | View Details |
 | Black / White Silicone O-Rings | Color | Standard black and white silicone O-rings. The most common colors for industrial and food-grade applications. | View Details |
 | Pantone Colors Silicone O-rings | Color | Silicone O-rings in any Pantone color for branding, color-coding or aesthetic requirements. | View Details |
 | Custom Colors Silicone O-rings | Color | Silicone O-rings matched to your exact color sample or specification. | View Details |
Tank seals, dairy processing, brewing, and bottling lines.
Bioreactors, sterilizers, drug delivery, and lab equipment.
Engine seals, exhaust gaskets, coolant systems, and EV battery packs.
Pipeline flanges, pressure vessels, and API-rated sealing.
LED thermal pads, enclosure seals, and EMI shielding.
Fuel systems, low-outgassing seals, and high-altitude use.
| Material | Temperature Range | Hardness (Shore A) | Oil Resistance | Chemical Resistance | Weather / Ozone Resistance | Tensile Strength (MPa) | Elongation at Break (%) | Tear Strength (kN/m) |
|---|---|---|---|---|---|---|---|---|
| VMQ Vinyl-Methyl Silicone | -60°C ~ +200°C Short-term: +250°C | 10 – 90 | ★★☆☆☆ | ★★★☆☆ | ★★★★★ | 5 – 10 | 200 – 800 | 10 – 30 |
| FVMQ Fluorosilicone | -60°C ~ +175°C Short-term: +200°C | 20 – 80 | ★★★★★ | ★★★★★ | ★★★★★ | 6 – 9 | 100 – 400 | 10 – 25 |
| PVMQ Phenyl-Vinyl-Methyl | -90°C ~ +200°C Short-term: +250°C | 30 – 80 | ★★☆☆☆ | ★★★☆☆ | ★★★★★ | 5 – 8 | 150 – 500 | 10 – 20 |
| Fiberglass Reinforced VMQ | -60°C ~ +200°C Short-term: +250°C | 40 – 90 | ★★☆☆☆ | ★★★☆☆ | ★★★★★ | 8 – 15 | 50 – 300 | 30 – 60 |
| Silicone Foam / Sponge Cellular Silicone | -40°C ~ +200°C | 15 – 50 (Density-based) | ★★☆☆☆ | ★★★☆☆ | ★★★★☆ | 0.3 – 1 | 100 – 300 | 2 – 5 |
| If Your Requirement Is… | Recommended Material | Key Considerations | Available Forms |
|---|---|---|---|
| General Purpose SealingCost-effective, wide temperature range, most common industrial applications | VMQ Vinyl-Methyl Silicone | Best balance of cost and performance. Good for static/dynamic seals, gaskets, O-rings. Not recommended for oil/fuel exposure. | HCRLSRRTV |
| Fuel / Oil ExposureAutomotive, aerospace, fuel systems, hydraulic environments | FVMQ Fluorosilicone | Superior resistance to fuels, oils, and hydrocarbon solvents. Trade-off: slightly lower maximum temperature (+175°C vs +200°C) and higher cost. | HCRLSR |
| Extreme Low TemperatureArctic, cryogenic, aerospace, outdoor in extreme cold | PVMQ Phenyl-Vinyl-Methyl | Maintains flexibility down to -90°C. Phenyl groups disrupt crystallization. Ideal for seals and connectors in cold environments. | HCR |
| High Structural StrengthLow deformation under load, high tear resistance, dimensional stability | Fiberglass Reinforced VMQ Glass Fiber Filled | Tensile strength up to 15 MPa and tear strength up to 60 kN/m. Good for structural gaskets, high-pressure seals, and anti-extrusion rings. | HCRSheet |
| Lightweight CushioningThermal/acoustic insulation, shock absorption, compressible seals | Silicone Foam Cellular / Sponge Silicone | Low density with closed/open cell structure. Not for high-pressure sealing. Good for gap filling, EMI shielding gaskets, and thermal barriers. | SheetCordProfile |
| Medical / Food ContactFDA compliance, biocompatibility, low extractables | VMQ Platinum Cured Grade | Platinum (addition) curing eliminates peroxide by-products. Meets USP Class VI and FDA 21 CFR 177.2600. Low volatile content. | LSRHCR |
| High Voltage InsulationCable accessories, electrical insulators, transformer gaskets | VMQ Unfilled or Mineral Filled | Excellent dielectric properties and volume resistivity. Unfilled grades preferred for highest insulation. Mineral fillers can improve tracking resistance. | HCRLSRRTV |
| Long-Term Outdoor ExposureUV resistance, ozone resistance, weather sealing for 20+ years | VMQ or FVMQ Both are excellent | All silicone rubbers have outstanding UV and ozone resistance. VMQ is preferred for general weatherstripping; FVMQ if combined with oil exposure. | HCRLSR |
| Complex Thin-Walled PartsHigh precision, intricate geometries, flash-free molding | VMQ LSR Grade | LSR’s low viscosity enables injection molding of thin walls and complex shapes with minimal flash. Faster cycle times than compression molding. | LSR |
| High Temperature + Oil CombinedEngine compartments, turbocharger systems, transmission seals | FVMQ High-Temp Fluorosilicone | Specialty FVMQ formulations can extend upper limit to +200°C while retaining fuel resistance. Premium grade with higher cost. | HCR |
HOW IT WORKS
Drawing, sample or even a photo — tell us quantity and application.
Detailed quote within 24h, with free design-for-manufacturing feedback.
Rapid prototype or sample mold to validate fit and function.
In-house mold making, then compression or LSR molding at scale.
100% inspection, certificates included, shipped worldwide.
Z.S.R Group is a leading custom silicone parts manufacturer and one-stop molding solution provider founded in 2007. We partner with brand owners, product managers, and engineers across the industrial, medical, and consumer goods sectors.
With strong manufacturing capabilities—including 38 compression molding machines, 12 LSR injection molding machines, 12 multi-color production lines, and advanced surface finishing—we ensure maximum flexibility, high precision, and easy scalability for your projects. We specialize in turning your drawings into precision parts with custom packaging, having successfully delivered over 15,000 projects worldwide.
At Z.S.R, we are fully committed to quality, compliance, and confidentiality. All our products meet global safety standards like FDA and LFGB, and we strictly protect your custom designs through Non-Disclosure Agreements (NDA).
We don’t just manufacture silicone parts—we engineer reliable, market-ready solutions from your first idea to mass production.
Our technical engineers will review your specs and reply with a full DFM (Design for Manufacturing) analysis & quote within 24 hours.