Premium Rubber O Ring, Reliable O Ring Kits

20+

Years Experience

10,000+

O-Ring Molds

6

Auto Robots

6

Optical Inspection Machines

About Lixu Rubber

Cixi Lixu Rubber Products Co., Ltd., established in 2006, specializes in the production and export of high-quality rubber seals including O rings, gaskets, grommets, plugs, stoppers, bushings, bellows, tubes, and custom moulding parts.

Our products meet international standards such as ROHS, REACH, FDA, UL, NSF, WARS, EN549, and EN681. We serve markets across North and South America, Europe, the Middle East, and Asia.

We welcome global customers to visit our factory and collaborate on every project with precision, speed, and reliability.

Why Choose Lixu?

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15+ Years Experience

Over 15 years of production and export expertise in O rings, OEM rubber parts, and O ring kits.

✓

10,000+ Molds

Full range of AS568, metric, and inch standard O ring sizes available in stock.

✓

Automated Production

6 groups of auto robots ensure consistent quality and fast delivery.

✓

Smart Quality Control

6 sets of optical inspection machines provide 100% automated quality checks.

✓

Custom Engineering

Professional engineers for DWG design and custom rubber part development.

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Competitive Pricing

Cost-effective solutions with guaranteed fast turnaround times.

Featured Rubber Seals Products

O Ring Kit

Complete kits in AS568, metric, and inch standards. Ideal for maintenance and industrial use.

Rubber Gaskets & Washers

Precision-cut gaskets and washers for sealing applications in valves, pumps, and machinery.

Custom Rubber Grommets

Protect wires and cables with durable, custom-sized rubber grommets for industrial use.

Custom Rubber Parts

Tailored rubber components including plugs, stoppers, bushings, and bellows.

NBR O Rings

Excellent oil resistance, wear resistance, and heat resistance. Ideal for automotive and industrial use.

EPDM Seals

EPDM Rubber Seals

Superior weather, ozone, and UV resistance. Perfect for outdoor and sanitary applications.

Silicone O Rings

Withstands extreme temperatures (-60°C to +230°C). Used in medical, food, and aerospace industries.

FKM (Viton®)

FKM Rubber Parts

High chemical and heat resistance. Ideal for oil & gas, chemical processing, and aerospace.

Our Capabilities

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Automated Vulcanization
6 rubber vulcanization robots ensure consistent curing and dimensional accuracy.
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Optical Inspection
6 auto optical inspection machines perform 100% quality checks with zero human error.
✓
Custom Molding
In-house tooling and engineering support for custom rubber part design and DWG creation.
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Global Compliance
Certified to ROHS, REACH, FDA, UL, NSF, WARS, EN549, EN681 standards.

Industry Insights

What Is NBR Material?

Nitrile butadiene rubber (NBR) offers excellent oil resistance, high wear resistance, and good heat resistance. Ideal for automotive and industrial seals.

Published: 02 September 2024

Understanding Neoprene O Rings

Neoprene O rings resist refrigerants, oils, ozone, and UV light. Commonly used in HVAC and outdoor applications.

Published: 10 November 2025

Top 10 Uses for Silicone O-Rings

From kitchen appliances to medical devices, silicone O-rings withstand extreme temperatures and chemicals.

Published: 16 December 2025

Frequently Asked Questions

What’s your packing for O rings and other products?

For O rings and rubber parts, we generally pack in hard cartons and ship on wooden pallets. O ring kits are packed in strong cartons with belts; pallet packing is also available.

What’s your quality guarantee procedure before shipment?

All rubber product formulas are developed according to customer technical requirements and undergo 100% inspection via smart automatic optical inspection machines.

How many O ring molds do you have? Do you have stock?

We have over 10,000 sets of O ring molds, including full AS568, metric, and inch standard sizes. Most standard sizes are in stock for fast delivery.

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