dbde24e1-4012-47b6-8db4-e89ee4ca5a70 - Polypac

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O-Ring Assortment Kit - 500+Pcs NBR Buna-N Seals in AS568 Sizes (8) - Polypac

O-Ring Assortment Kit - 500+Pcs NBR Buna-N Seals in AS568 Sizes (9) - Polypac

O-Ring Assortment Kit - 500+Pcs NBR Buna-N Seals in AS568 Sizes (3) - Polypac

O-Ring Assortment Kit - 500+Pcs NBR Buna-N Seals in AS568 Sizes (2) - Polypac

O-Ring Assortment Kit - 500+Pcs NBR Buna-N Seals in AS568 Sizes (1) - Polypac

O-Ring Assortment Kit - 500+Pcs NBR Buna-N Seals in AS568 Sizes (4) - Polypac

Polypac Custom O-Rings Manufacturer — Reliable Rubber Seals

Polypac manufactures high-quality custom O-rings in NBR, FKM, silicone, EPDM and FFKM. With advanced equipment, a large production facility, and decades of sealing expertise, we deliver durable, tailored sealing solutions for demanding conditions.

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Product Description

Custom O-Rings by Polypac

Polypac is a scientific and technical hydraulic seal manufacturer and oil seal supplier dedicated to producing custom O-rings and rubber rings. Founded in 2008, our company grew from filled PTFE seal expertise to a full range of elastomer O-rings. We combine advanced equipment, a large factory footprint, and strong research partnerships to deliver seals that meet real-world needs.

Materials & Applications

We produce custom O-rings in commonly used materials such as NBR, FKM, silicone, EPDM, and high-performance FFKM. Each material is chosen to match your working conditions — oil resistance, high temperature, chemical exposure, or extreme weather. Our early work with bronze-, carbon-, graphite-, MoS₂-, and glass-filled PTFE gives us extra skill in specialty sealing needs.

Why Choose Polypac

Factory scale and capability: Over 10,000 m² site with 8,000 m² production area and industry-leading testing equipment.
Customization: Fast tooling and flexible production for custom sizes, grooves, and compound requirements.
Proven quality: Long-term collaborations with universities and research labs support material development and performance testing.
Practical value: Durable seals that reduce downtime, extend equipment life, and lower maintenance costs.

Trusted for Tough Conditions

Whether you need hydraulic seals, oil seals, or custom rubber rings for special environments, Polypac focuses on reliable performance. Our production process emphasizes consistency, traceability, and rapid delivery so your equipment keeps running smoothly.

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Tell us your application, required material, and dimensions. Polypac’s experienced engineers will recommend the right O-ring design and material to balance cost and performance. Contact us for samples, technical support, and a quote for custom O-rings tailored to your project.

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Question you may concern

Can I reuse a seal?

We strongly recommend never reusing seals. Once compressed and used, a seal takes a "set" and its elastic properties are degraded. Reusing it almost always results in a leak. Always install a new seal during any maintenance or repair.

What is the difference between a static seal and a dynamic seal?

A Static Seal is used between two surfaces that do not move relative to each other (e.g., pipe flanges, end caps). O-rings and gaskets are common static seals. A Dynamic Seal is used between surfaces that do move (e.g., piston and cylinder, rotating shaft). Rod seals, piston seals, and rotary shaft seals are designed for this purpose.

How do I choose the right material for my sealing application?

Material selection depends on four key factors: Media: What fluid or gas will the seal contact? (e.g., petroleum oil, water, chemicals, steam) Temperature: What is the minimum and maximum operating temperature? Pressure: What is the system's operating pressure? Are there pressure spikes? Application: Is it a static, dynamic, or rotary seal? Example: NBR (Buna-N) is excellent for standard hydraulic oil, while FKM (Viton®) is needed for high temperatures or aggressive chemicals.

How can I prevent seal damage during installation?

Use Tools: Always use dedicated installation tools (e.g., picks, cones, guides). Lubricate: Always lubricate the seal and the contact surface. Protect Sharp Edges: Cover sharp threads and edges with tape or use an installation sleeve. Check the Groove: Ensure the installation groove is clean, deburred, and undamaged.

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PRODUCTS

dbde24e1-4012-47b6-8db4-e89ee4ca5a70

Polypac Industrial Technology Co.,Ltd

+86 189 2463 6168

rose@dmsseals.com

No. 5, Hegui Mid Road, Hegui Industrial Park, Lishui Town, Nanhai District, Foshan City, Guangdong Province, P.R. China.

O-Ring Seals - Buna-N Nitrile Rubber Standard AS568 Sizes

O-rings are the most versatile and economical sealing solution for static and dynamic applications. Our nitrile rubber O-rings offer excellent resistance to petroleum-based oils, fuels, and hydraulic fluids, making them ideal for a wide range of industrial, automotive, and plumbing uses.

O-Ring Seals - Buna-N Nitrile Rubber Standard AS568 Sizes

O-Ring Assortment Kit - 500+Pcs NBR Buna-N Seals in AS568 Sizes

This comprehensive O-ring kit contains the most commonly used sizes and durometers for general maintenance and repair.

O-Ring Assortment Kit - 500+Pcs NBR Buna-N Seals in AS568 Sizes

RSJ Seals: Single-Acting Piston Rod Seal (Hydraulic, Dust Lip)

Polypac RSJ Seals: Single-Acting Piston Rod Seal designed for hydraulic systems. Featuring a durable dust lip, it ensures reliable sealing and protection against contaminants. Ideal for hydraulic applications requiring high-performance RSJ seals and piston rod sealing solutions.

RSJ Seals: Single-Acting Piston Rod Seal (Hydraulic, Dust Lip)

SPGO Type Oil Seal - Spring-Loaded Double-Lip Rotary Shaft Seal

This SPGO oil seal offers reliable performance in rotary shaft applications. Key features include:

SPGO Type Oil Seal - Spring-Loaded Double-Lip Rotary Shaft Seal