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Precision Rubber Seals & Custom Parts

Polysealing is a trusted manufacturer based in Xiamen, China with over 20 years of expertise in rubber sealing solutions. We deliver high-quality O-Rings, X-Rings, Oil Seals, and custom rubber components for automotive, industrial, medical, and hydraulic applications.

Rubber Seals Manufacturing

About Polysealing

A leading manufacturer of rubber seals and custom parts with two decades of innovation, quality, and global service.

Factory Interior

20+ Years of Sealing Excellence

Our Poly Sealing is a manufacturer specializing in rubber seals & parts in Xiamen, China. Based on 20 years of technology experience, we have developed a one-stop solution from mold designing and rapid prototyping to mass production.

We are always 100% responsible to our customers, so we never use cheap quality materials. All materials are completely new and do not include any scrap. Trust in us — both of us will win much more market.

  • ISO3601 compliant manufacturing
  • Over 5,000 mold tooling in stock
  • Global delivery with timely shipments
  • Advanced equipment & scientific management

Our Products

High-performance rubber sealing solutions engineered for reliability across industries.

O-Rings

O-Rings

Circular cross-section seals used to block fluids like air, water, and oil. Available in NBR, FKM, silicone, and more.

Standards: ISO3601
Materials: Nitrile, Viton, Silicone
X-Rings

X-Rings (Quad Rings)

Four-lip seal with X-shaped cross-section for enhanced sealing performance and reduced friction.

Advantages: Lower friction, longer life
Applications: Pneumatics, Hydraulics
Oil Seals

Oil Seals

TC, TB, TA, SC, SB, and other types. Designed to retain lubricants and exclude contaminants.

Sizes: ID, OD, W
Materials: NBR, FKM, PTFE
Rubber Gaskets

Rubber Gaskets

Custom-shaped seals for flanges and joints. Ideal for machinery, instruments, and industrial systems.

Types: Flat, molded, die-cut
Materials: EPDM, Neoprene, Silicone
Custom Rubber Parts

Custom Rubber Parts

Tailored sealing solutions from mold design to mass production. Rapid prototyping available.

Process: Design → Mold → Test → Produce
Industries: Medical, Electronics, Automotive
Bonded Seals

Bonded Seals

Metal-rubber composite seals for high-pressure and vibration-prone environments.

Structure: Steel core + rubber layer
Use Cases: Hydraulic fittings, connectors
O-Ring Cords

O-Ring Cords

Continuous rubber cords for cutting custom O-rings on-site. Available in various diameters and materials.

Diameters: 1mm to 10mm
Materials: NBR, Silicone, FKM
O-Ring Kits

O-Ring Kits

Comprehensive sets of standard-sized O-rings for maintenance, repair, and industrial use.

Standards: AS568, JIS, ISO
Materials: Mixed (NBR, FKM, Silicone)
FKM/Viton Seals

FKM / Viton Seals

High-temperature and chemical-resistant seals ideal for harsh environments in automotive and semiconductor industries.

Temp Range: -20°C to +200°C
Resistant to: Oils, fuels, acids
Silicone Seals

Silicone Rubber Seals

Food-grade and medical-grade seals with excellent flexibility and temperature resistance.

Applications: Food & Drug Equipment, Medical Devices
Standards: FDA, USP Class VI
Polyurethane Seals

Polyurethane Seals

High abrasion resistance and mechanical strength. Used in hydraulic and pneumatic systems.

Hardness: 70A to 95A
Performance: Wear-resistant, high load
PTFE Seals

PTFE / Teflon Seals

Low friction, chemically inert seals for extreme conditions. Often used in semiconductor and chemical processing.

Benefits: Non-stick, wide temp range
Forms: Backup rings, spring-energized

Our Capabilities

From mold design to global delivery, we offer a complete manufacturing ecosystem for rubber sealing solutions.

Advanced Manufacturing

State-of-the-art equipment for mold tooling, plating, compound mixing, compression molding, and packaging.

Quality Assurance

Full inspection devices and scientific management ensure every product meets ISO3601 and customer specifications.

Rapid Prototyping

Fast turnaround from design to sample. Ideal for custom parts and urgent project needs.

Material Expertise

Wide selection: NBR, FKM, Silicone, Polyurethane, PTFE, ACM, and more. No scrap materials used.

Global Supply

Over 5,000 mold tooling and sufficient stock ensure timely delivery to customers worldwide.

Customer Partnership

We build strong, long-term relationships based on trust, quality, and continuous improvement.

20+
Years Experience
5,000+
Mold Tooling
100+
Global Clients
24h
Response Time

Frequently Asked Questions

What is an O-Ring?

An O-Ring is a rubber sealing ring with a circular cross-section used to seal fluids such as air, water, and oil. Due to its o-shaped cross-section, it is called an O shape rubber seal.

What are the differences between X-Rings and O-Rings?

In addition to the cross-section shape, X-Rings have four sealing lips which offer better performance in dynamic applications with reduced friction and longer service life, though they are typically more expensive than O-Rings.

What materials do you use for oil seals?

We offer a wide range of materials including NBR (nitrile), FKM (Viton), silicone, polyurethane, PTFE (Teflon), and ACM. Each material is selected based on temperature, chemical exposure, and application requirements.

Do you manufacture custom rubber parts?

Yes, we provide full custom rubber part services from mold design and prototyping to mass production. We specialize in precision components for automotive, medical, and industrial sectors.

Are your products ISO certified?

Our factory produces qualified products in full compliance with international standards such as ISO3601. We maintain strict quality control throughout the manufacturing process.

Get in Touch

Have a question or need a quote? Contact us today for expert sealing solutions.

Email: sales@polysealing.com
Phone: 0086 152 59212301

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