Industrial Grade Silicone O-ring
Manufacturer & Custom Solutions
Industrial Grade Silicone O-ring
ZSR Silicone offers industrial grade silicone O-rings that balance performance and cost. They handle -60°C to 230°C, resist ozone and UV, and seal reliably in static applications. Available in black, white or custom colors with fast turnaround.
FDA 21 CFR 177.2600
Rubber Articles Intended for Repeated Use
LFGB 30&31
EU Food Contact Materials
USP Class VI / ISO 10993
Biocompatibility of Medical Devices
RoHS / REACH
Environmental Compliance
UL 94
Flammability of Plastic Materials
Built to Your Exact Spec
Custom Silicone O-Rings Options
Every Silicone Grade, One Perfect Seal
Every O-ring starts with the right compound. Platinum-cured and peroxide-cured systems are available for all grades — we recommend platinum cure for food and medical contact.
| Grade | Hardness (Shore A) | Temperature | Compliance | Best For |
|---|---|---|---|---|
| Industrial VMQ | 30 – 80 | -60°C to +230°C | RoHS / REACH | General industrial sealing |
| FDA Food Grade | 30 – 70 | -60°C to +230°C | FDA 21 CFR 177.2600 | Food & beverage equipment |
| Medical Grade (Platinum) | 10 – 70 | -60°C to +230°C | USP Class VI | Medical devices & laboratory |
| High Temperature | 40 – 80 | up to +300°C | RoHS | Ovens, lighting, engine bays |
| Fluorosilicone (FVMQ) | 40 – 80 | -60°C to +200°C | RoHS | Fuel, oil & solvent exposure |
| LSR (Liquid Silicone) | 10 – 80 | -60°C to +230°C | FDA / medical grades | High-volume precision parts |
| Transparent / Clear | 30 – 70 | -60°C to +200°C | FDA options | Visual inspection points |
From 0.5 mm ID to Oversized Joint Rings
Size, cross-section and tolerance are fully custom. Send a drawing, a standard size number (e.g., AS568-214), or a physical sample — we handle the rest.
| Item | Range / Options |
|---|---|
| Size Range | ID 0.5 – 500 mm+; molded or vulcanized-joint for oversized IDs |
| Cross-Section | 0.5 – 10 mm; round (standard), square-cut, custom profile |
| Size Standards | AS568 · JIS B2401 · BS 1806 · DIN 3771 · ISO 3601 · ISO 6149 · AN6227 / AN6230 (see standards table below) |
| Tolerance | ISO 3302-1 class per size & process; ±0.05 mm on small molded rings |
| Custom Geometry | Non-standard ID / cross-section from your drawing or sample |
| Surface | Standard finish / PTFE-coated for low friction |
Any Color Your Brand or Assembly Needs
We color-match silicone compounds to Pantone or RAL references, including translucent and transparent grades for visual inspection points.
Your Brand, Built Into the Part
Branding, part numbers and batch traceability — molded in, engraved or printed, without compromising the seal.
Molded, Spliced or Coated — One Factory
Molding, splicing and finishing under one roof — we match the process to your volume, size and tolerance target.
| Process | How It Works | Best For |
|---|---|---|
| Compression Molding | Pre-formed silicone pressed and cured in a heated mold | Medium volumes, large cross-sections |
| LSR Injection Molding | Liquid silicone injected into closed molds | High volumes, tight tolerances |
| Vulcanized Joint (Spliced) | Extruded cord cut to length and vulcanized into a ring | Oversized IDs, low volumes, fast tooling |
| PTFE Coating | Low-friction coating applied to finished rings | Dynamic sealing, easy installation |
| Rapid Prototyping | Prototype tooling before production mold | Fit & function validation |
Related Silicone O-ring
| Image | Product | Type | Short Info | Action |
|---|---|---|---|---|
| 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 |
| JIS B2401 Silicone O-Ring | Standard & Size | Japanese industrial standard O-rings commonly used in Asian-manufactured machinery and automotive equipment. | View Details |
| 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 |
| 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 |
| 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 |
| 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 |
 | VMQ Silicone O-Rings | Materials | Heat and cold-resistant silicone O-rings for food, medical, automotive, and industrial applications. | 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 |
| Fiberglass Reinforced Silicone O-rings | Materials | High-strength silicone O-rings reinforced with fiberglass fabric. Withstands extreme heat and pressure. | 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 |
| Custom Colors Silicone O-rings | Color | Silicone O-rings matched to your exact color sample or specification. | View Details |
What Is Industrial Grade Silicone?
Industrial Grade silicone is standard silicone rubber made for general-purpose sealing. It is not certified for food contact, and it is not tested for medical use. But for machinery, electronics, vehicles, and equipment, it delivers everything you need at the best price.
What It Is Made Of
Industrial Grade silicone uses the same polysiloxane polymer as all silicone rubber. At ZSR, we mix the raw silicone with reinforcing fillers (like fumed silica) to add strength, plus pigments for color and a curing agent. The compound is then molded into O-rings using compression or injection molding.
How It Differs from Higher Grades
The material itself is similar. The main differences are:
Key Properties
Why Choose Industrial Grade?
Choose Industrial Grade when:
Grade Comparison: Industrial vs Food vs Medical
At ZSR Silicone Parts, we make O-rings in three quality levels. The table below shows how Industrial Grade fits between Food Grade and Medical Grade.
Feature | Industrial Grade | FDA Food Grade | Medical Grade |
|---|---|---|---|
Purpose | General sealing for machinery, electronics, and vehicles | Safe for direct contact with food and drinks | Safe for medical devices and long-term human contact |
Material Purity | Standard silicone compound. No special migration tests. | Platinum-cured or specially tested. Low migration. | Highest purity. Full biocompatibility testing. |
Curing System | Peroxide or platinum cured | Usually platinum cured | Usually platinum cured |
Production Environment | Standard clean workshop | Dedicated food-safe area or line separation | Controlled cleanroom environment |
Testing Required | Standard QC: size, hardness, appearance | FDA 21 CFR 177.2600 migration testing | USP Class VI, ISO 10993 biocompatibility |
Certification | Standard COA | FDA compliance letter, LFGB available | USP Class VI report, ISO 10993 summary |
Odor & Taste | May have slight rubber smell | No odor, no taste | No odor, no taste |
Traceability | Batch number recorded | Batch number + material lot tracked | Full batch + material + mold + operator traceability |
Price Level | Lowest cost | Medium cost | Highest cost |
Best For | Non-sensitive industrial sealing | Coffee machines, water bottles, food mixers | Medical devices, implants, surgical tools |
Why so many names?
ZSR's Recommendation:
If your O-ring does not touch food, medicine, or human skin, Industrial Grade is the smart choice. It gives you the same heat resistance and flexibility as higher grades, but at a lower price.
What "Industrial Grade" Means at ZSR
At ZSR, we use all three terms interchangeably. When you order HCR O-rings, HTV O-rings, or Solid Silicone O-rings from us, you receive the same high-quality material made from high-molecular-weight polysiloxane with excellent heat resistance and flexibility., "Industrial Grade" does not mean low quality. It means the right quality for industrial jobs. Here is what you get with every Industrial Grade silicone O-ring from ZSR:
Standard Material, Proven Performance
We use the same base silicone polymers for Industrial Grade as we do for higher grades. The difference is in the testing and documentation, not in the basic rubber quality. Industrial Grade O-rings still handle -60°C to +230°C and resist ozone, UV, and moisture.Z
Strict Quality Control
Every batch of Industrial Grade O-rings at ZSR goes through our standard inspection process:
Size check
AMeasured against ISO 3601-3 Grade N or Grade S tolerances
Visual inspection
Checked for bubbles, cracks, foreign particles, and surface defects
Hardness test
Shore A durometer check to confirm the ordered grade
Batch record
Every order is linked to a production batch for consistency tracking
No Unnecessary Costs
We do not run FDA migration tests or biocompatibility studies on Industrial Grade material. This keeps the cost down for applications that do not need those certifications. You pay only for the quality level your job actually requires.
Available Options
Even at Industrial Grade, ZSR offers flexibility:
Hardness
20 to 80 Shore A
Colors
Black, white, red, blue, and custom colors
Sizes
AS568, ISO 3601, JIS B 2401, or fully custom
Curing
Peroxide (standard) or platinum (if you need better odor control)
When to Upgrade
If your project later needs food contact or medical approval, ZSR can switch the same O-ring design to Food Grade or Medical Grade material using the same molds. This makes Industrial Grade a good starting point for product development and testing.
Common Applications
ZSR's Industrial Grade silicone O-rings are used across many industries where the seal does not need food or medical certification.
Industry | Application | Why Industrial Grade Works |
|---|---|---|
Automotive | Engine cover seals, lighting gaskets, sensor housings, battery packs | Handles engine heat and outdoor weather. No food contact needed. |
Electronics | Enclosure seals, cable gland seals, LED lighting gaskets | Insulates electricity and keeps dust and water out. |
Industrial Machinery | Pump seals, valve gaskets, compressor seals, hydraulic covers | Resists heat and ozone in factory environments. |
Home Appliances | Washing machine seals, dishwasher gaskets, air conditioner parts | Long life in hot, wet conditions. Cost-effective for high-volume production. |
Plumbing & HVAC | Pipe flange seals, faucet gaskets, heating system O-rings | Flexible at low temperatures. Resists water and steam. |
Aerospace (Non-Critical) | Interior panel seals, duct gaskets, non-fuel system covers | Wide temperature range fits cabin and equipment bay conditions. |
Renewable Energy | Solar panel junction box seals, wind turbine sensor gaskets | UV and weather resistant for outdoor exposure. |