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Precision Sealing.
Superior Quality.

HOK is a leading rubber seal manufacturer with over 30 years of experience in oil seal design, manufacturing, and quality control. As a professional supplier of rotary shaft oil seals, O-rings, valve stem seals, and other rubber molded parts, we deliver reliable sealing solutions trusted by industries worldwide.

30+
Industry Experience
50+
Patent Certificates
60+
Export Countries
7000+
Products

About HOK Seal

Changzhou HOK Seal Material Co., Ltd. was established in March 2009 as a high-tech enterprise specializing in the design, R&D, production, and sales of composite sealing systems. With over 300 employees, including 20% dedicated to technical and R&D roles, we operate an independent R&D center, mold machining center, research test center, and three large production bases.

HOK is a trusted manufacturer with 30+ years of experience in oil seal technology. We provide customized sealing solutions for automotive, rail transit, heavy vehicles, wind power, and photovoltaic industries. Our advanced automated production lines and high-efficiency compression molding technology ensure consistent quality and high output.

HOK Factory

Our Products

Explore our wide range of precision-engineered rubber seals, designed for durability, performance, and reliability across diverse industrial applications.

Rotary Shaft Oil Seal

Rotary Shaft Oil Seal

Designed for dynamic sealing in rotating equipment. Resistant to high pressure, temperature, and wear.

Shock Absorber Oil Seal

Shock Absorber Oil Seal

Ensures leak-free performance in automotive and heavy vehicle suspension systems.

Valve Stem Seal

Valve Stem Seal

Prevents oil leakage in internal combustion engines. High thermal and chemical resistance.

Bearing Seal

Bearing Seal

Protects bearings from contaminants and retains lubrication in industrial environments.

Modified PTFE Oil Seal

Modified PTFE Oil Seal

Low friction, high chemical resistance. Ideal for extreme temperature and aggressive media.

O-Ring

O-Ring

Standard and custom O-rings in various rubber materials for static and dynamic sealing.

Fuel Injector O-Ring

Fuel Injector O-Ring

High-performance sealing for fuel systems. Resistant to gasoline, diesel, and biofuels.

Bonded Seal

Bonded Seal

Metal-rubber composite seals for high-pressure hydraulic and pneumatic applications.

Why Choose HOK Seal?

Customized Solutions

Products can be customized according to customer needs, including size, material, and performance.

Adjustable Process

Advanced manufacturing processes meet various performance requirements and environmental conditions.

Automated Production

Advanced automation ensures consistent product appearance, dimensional accuracy, and high yield.

High Production Efficiency

Efficient compression mold molding technology improves overall output and delivery speed.

Advanced Testing Equipment

Equipped with high-end testing systems to ensure durability, reliability, and extended service life.

Strong Adaptability

Wide range of high-performance rubber materials to suit complex and harsh operating environments.

Our Applications

Rail Transit

Heavy Vehicle

Automotive Industry

Wind Power & Photovoltaic

HOK seals are trusted in critical applications across multiple industries, ensuring safety, efficiency, and long-term performance.

Latest News

Upcoming Event

HOK SEAL Will Attend Shanghai Automechanika 2025

Visit us at booth #8.1E116 to explore our latest sealing innovations for the automotive industry.

Past Event

HOK Attended China Wind Power 2025

We showcased our advanced sealing solutions for wind turbines and renewable energy systems.

Get in Touch

For inquiries, quotes, or partnership opportunities, visit the official HOK Seal website to contact the team directly.

Email: info@hokseal.com

Phone: +86 519 68880137

Address: No.2188, Longcheng Road, Zhonglou District, Changzhou, Jiangsu Prov., China

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