Custom Silicone O-Rings Manufacturer
NEWTOP manufactures custom silicone O-rings, rubber sealing rings and gasket rings for industrial sealing, appliance, automotive, kitchenware, houseware and precision component applications. We support material selection, tooling, sampling and mass production.
Silicone O-Rings and Rubber Sealing Rings We Can Produce
We support both standard O-ring specifications and customized sealing ring projects that require specific materials, hardness, dimensions and working conditions.
Built Around Your Size, Material and Sealing Environment
A good O-ring project starts with the right size and material. We can help review inner diameter, outer diameter, cross-section, hardness, color, tolerance, working temperature and contact media before sampling or production.
Common sealing rings in standard ID, OD and cross-section combinations.
Customized dimensions based on drawings, samples or assembly requirements.
VMQ, FKM, NBR, EPDM, CR and FVMQ options for different environments.
For automotive, appliance, kitchenware, houseware and industrial sealing parts.
SIL / VMQ O-Rings
Flexible silicone O-rings for high- and low-temperature sealing applications.
FKM / Viton O-Rings
Rubber sealing rings for oil, chemical and high-temperature environments.
NBR O-Rings
Oil-resistant and wear-resistant O-rings for general industrial sealing use.
CR O-Rings
Weather- and aging-resistant sealing rings for selected outdoor and industrial uses.
FVMQ O-Rings
Fluorosilicone O-rings for applications involving oils, solvents and temperature changes.
EPDM O-Rings
Ozone-, steam- and aging-resistant O-rings for water and outdoor applications.
Custom Color O-Rings
Custom colors for identification, assembly control and product-series requirements.
Custom Size O-Rings
Non-standard ID, OD and cross-section dimensions developed from drawings or samples.
O-Ring Parameter Reference Guide
Use the following table as a quick reference before sending an inquiry. Clear parameters help us review material, tooling, tolerance and quotation more accurately.
| Parameter | What It Means | How To Provide It | Why It Matters |
|---|---|---|---|
| ID | Inner Diameter | Provide the inner hole diameter in mm or inch. | Controls how the O-ring fits around the shaft, groove or fitting. |
| OD | Outer Diameter | Provide the outer diameter, or allow us to calculate from ID and CS. | Helps confirm available space and sealing contact range. |
| CS / C/S | Cross Section | Provide the cord thickness. Common formula: OD = ID + 2 × CS. | Affects compression, sealing performance and assembly fit. |
| Material | Rubber compound | SIL / VMQ, FKM, NBR, EPDM, CR, FVMQ or application description. | Determines temperature, chemical, oil, steam and aging resistance. |
| Hardness | Shore A durometer | Common range: 40A–90A depending on material and application. | Affects compression, installation feel and sealing pressure. |
| Working Temperature | Operating environment | Provide minimum and maximum temperature, plus continuous or short-term exposure. | Prevents wrong material selection for heat, cold or steam exposure. |
| Contact Media | Liquid, gas or chemical contact | List water, oil, fuel, acid, alkali, food contact, solvent or other media. | Helps avoid swelling, cracking, hardening or sealing failure. |
| Quantity & Packaging | Order and delivery requirement | Provide sample quantity, trial order, mass order, bagging or labeling needs. | Helps plan tooling, production method, inspection and unit cost. |
Common O-Ring Material Selection
Different O-ring materials serve different sealing environments. The table below can be used as an initial reference before final material confirmation.
| Material | Common Hardness | Temperature Reference | Typical Strength | Common Application Direction |
|---|---|---|---|---|
| SIL / VMQ | Standard 50A; custom 40A–90A | -60°C to 250°C | High and low temperature resistance; FDA-compliant options. | Food-grade, appliance, kitchenware and general sealing projects. |
| FKM / Viton | Standard 70A; custom 40A–90A | 40°C to 240°C | High temperature, oil and chemical resistance. | Oil-contact, chemical-contact and industrial sealing parts. |
| NBR | Standard 70A; custom 40A–90A | -40°C to 120°C | Oil resistance, wear resistance and good tensile strength. | General industrial sealing, mechanical parts and oil-contact use. |
| CR | Standard 70A; custom 40A–90A | -40°C to 120°C | Ozone, weather, aging and chemical resistance. | Outdoor, weather-exposed and selected industrial sealing uses. |
| FVMQ | Standard 70A; custom 45A–70A | -60°C to 177°C | Oil, acid, alkali, solvent and heat resistance. | Special sealing projects requiring fluorosilicone performance. |
| EPDM | Standard 70A; custom 40A–90A | -40°C to 150°C | Steam, ozone, aging, acid and alkali resistance. | Water, steam, appliance and outdoor sealing applications. |
Why Work With NEWTOP for Silicone O-Rings?
O-ring projects require dimensional consistency, material reliability and stable repeat production. Our factory support is built around these requirements.
O-Ring Manufacturing Experience
We support silicone and rubber O-ring projects from standard sizes to custom molded sealing rings.
Size and Fit Control
We review ID, OD, cross-section, tolerance, groove fit and application conditions before production.
Tooling Support
Custom molds can be developed for non-standard sizes, special sections and project-specific sealing parts.
Process Matching
Compression molding, injection molding, trimming and secondary processing can be selected by project.
Quality Inspection
Inspection can include dimensions, appearance, hardness, material confirmation and sample approval records.
Repeat Supply Stability
Approved samples, mold records, material records and inspection standards are kept for repeat orders.
From Sealing Requirement to Production-Ready O-Rings
Before production, we review how the O-ring will be compressed, installed, exposed and used. This helps avoid material mismatch, poor fit and unstable sealing performance.
- Dimension review: confirm ID, OD, CS, groove size, tolerance and assembly space.
- Material review: match silicone or rubber material to temperature, media and working environment.
- Tooling review: confirm mold structure, parting line, shrinkage and batch production feasibility.
- Sample validation: check size, appearance, hardness, fit and customer approval before mass production.
Key Quality Points We Control
O-rings are small parts, but their dimensional and material consistency directly affect sealing performance. We focus on the details that matter in use.
Dimensional Accuracy
Check ID, OD, cross-section, tolerance and fit consistency.
Material Confirmation
Confirm rubber material, hardness, color and project-specific requirements.
Surface & Edge Finish
Control flash, burrs, surface marks, deformation and visible defects.
Repeat Consistency
Keep approved samples, mold records, material records and inspection standards.
Application Directions for Custom O-Rings
NEWTOP supports O-ring projects for industrial, consumer, appliance and sealing system applications.
Automotive
Sealing rings for components, fittings, connectors and fluid-related parts.
Appliance
O-rings for water systems, kitchen appliances and household equipment.
Kitchenware
Food-contact sealing rings for jars, containers, lids and kitchen products.
Industrial Sealing
O-rings for fittings, valves, connectors, pumps and mechanical assemblies.
Support for Stock, Custom and Repeat O-Ring Orders
Beyond production, we also support specification planning, material comparison, sample confirmation, packaging and long-term supply management.
- Specification support: standard sizes, custom sizes, ID / OD / CS review and drawing support.
- Material support: silicone, FKM, NBR, EPDM, CR, FVMQ and application-based compound selection.
- Order coordination: sample approval, batch schedule, inspection confirmation and shipment arrangement.
- Repeat supply: mold records, approved samples, material records and packaging standards are maintained.
Simple Custom O-Ring Project Flow
Send Details
Provide ID, OD, CS, drawing, sample, material needs, quantity and application.
Review & Quote
We review size, material, tooling feasibility, tolerance and production method.
Tooling & Sample
Samples are made for size, material, appearance, hardness and fit confirmation.
Mass Production
Production starts after approval, followed by inspection, packaging and delivery.
Start Your Custom Silicone O-Ring Project
Send us your drawing, sample photo, ID, OD, cross-section, material requirements, working conditions and target quantity. We will review the sealing requirement and provide a practical production solution.