FDA Food Grade Silicone O-Rings
Manufacturer & Custom Solutions
FDA Food Grade Silicone O-Rings
ZSR Silicone FDA food grade O-rings are made with ingredients listed in FDA 21 CFR 177.2600. They are odorless, tasteless and safe for repeated food contact. Common uses include dairy equipment, beverage dispensers and baking ovens.
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-ring Options
| 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 |
FDA Compliance Explained
At ZSR Silicone Parts, FDA Food Grade means our silicone O-rings meet FDA 21 CFR 177.2600 — the U.S. regulation for rubber articles that touch food again and again. Here is what that means in plain language.
What 21 CFR 177.2600 Requires
This rule sets two main requirements for food-contact silicone:
Allowed Ingredients Only
The silicone compound must use only raw materials that the FDA has approved for repeated food contact. This includes the base polymer, fillers, pigments, and curing agents.
Extractables Limits
When tested, the O-ring must not release too much material into food simulants. The standard tests use distilled water and n-hexane under controlled temperature and time. The extractable matter must stay below the FDA limits.
How ZSR Meets These Requirements
Formula Control
Every food-grade compound at ZSR is built from an FDA-approved recipe. We do not swap fillers or pigments without checking the FDA list first.
Post-Curing
All food-grade O-rings receive a secondary oven bake at 180°C–200°C for several hours. This removes residual volatiles and stabilizes the material before it reaches you.
Platinum Curing Preferred
We use platinum-cured silicone for most food-grade orders because it leaves no peroxide by-products. This gives lower extractables and a cleaner, odor-free part.
Testing on File
ZSR keeps third-party test reports for extractables and migration. We can share these with your quality team on request.
Important Note:
FDA 21 CFR 177.2600 is a U.S. standard. If you also sell in Europe, you may need LFGB or EU 10/2011 compliance. ZSR can produce dual-certified compounds that pass both FDA and LFGB testing. Just tell us your target market when you order.
Food Grade vs Industrial Grade
The material looks the same, but the production rules are different. Here is how ZSR's Food Grade O-rings differ from our Industrial Grade O-rings.
Feature | Industrial Grade | FDA Food Grade |
|---|---|---|
Purpose | General machinery and equipment sealing | Safe for direct or repeated contact with food and drinks |
Curing System | Peroxide or platinum cured | Usually platinum cured for lowest extractables |
Odor & Taste | May have slight rubber smell | No odor, no taste |
Post-Cure Process | Standard | Extended post-cure to remove volatiles |
Production Area | Standard clean workshop | Dedicated food-grade line or strict cleaning between batches |
Migration Testing | Not required | Tested for extractables in water and n-hexane |
Documentation | Standard COA | FDA compliance declaration + migration test report |
Traceability | Batch number recorded | Batch + raw material lot tracked |
Color Options | Any color | Food-safe pigments only |
Price | Lower | Higher due to extra testing and process control |
When to Choose Food Grade at ZSR:
When Industrial Grade Is Enough:
Application Examples
ZSR manufactures FDA food-grade silicone O-rings for equipment and appliances where safety and cleanliness matter.
Industry | Application | Why Food Grade Matters |
|---|---|---|
Coffee & Beverage | Espresso machine seals, coffee maker gaskets, water dispenser O-rings, juice extractor seals | No taste or smell transfers into drinks. Handles hot water and steam daily. |
Food Processing | Mixing tank seals, conveyor belt gaskets, filling machine O-rings, dairy equipment | Resists cleaning chemicals and high-temperature washdowns. Safe for repeated food contact. |
Home Appliances | Blender gaskets, food processor seals, rice cooker lids, steam oven doors | Direct contact with food and steam. Parents and cooks expect safe materials. |
Baby & Childcare | Baby bottle seals, sippy cup gaskets, breast pump parts, baby food containers | Highest safety expectation. No harmful chemicals. Platinum-cured purity preferred. |
Commercial Kitchen | Steam table gaskets, dishwasher seals, ice machine O-rings | Must pass health inspections. Needs reliable documentation from the supplier. |
Pharmaceutical | Tablet press seals, mixing vessel gaskets, liquid transfer equipment | Although not medical grade, food-grade purity is often accepted for non-implant drug equipment. |
What Is FDA Food Grade Silicone?
FDA Food Grade silicone is silicone rubber that has been formulated, tested, and produced to meet U.S. food-contact safety rules. It is the same basic material as industrial silicone — flexible, heat-resistant, and durable — but it is held to a higher standard of purity and cleanliness.
How It Is Different from Industrial Silicone
The difference is not in the main polymer. Both grades use polydimethylsiloxane. The difference is in what else is in the mix and how it is processed:
Key Properties of FDA Food Grade Silicone
FDA Food Grade Silicone is simply industrial silicone that has been cleaned up, tested, and documented for food safety. It costs more than industrial grade because of the extra controls, but for any product that touches food or drink, it is the only responsible choice. At ZSR, we produce food-grade O-rings in standard sizes and custom sizes, with full paperwork to support your quality audits and customer claims.