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Blue Color Rubber O-Rings
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4 Orange Rubber O-Rings
1 Red Rubber O-Ring
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A Green O-Ring
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Blue Color Rubber O-Rings
Black Color Rubber O-Rings
Blue Color O-Rings
4 Orange Rubber O-Rings
1 Red Rubber O-Ring
2 Yellow Rubber O-Rings
A Green O-Ring

Rubber O-Rings (O-Ring Seals / O-Ring Gaskets): Reliable Sealing Solutions for Industrial, Automotive, & Plumbing Applications

Rubber O-Rings provide a simple yet highly effective sealing solution for preventing leaks, maintaining pressure, and ensuring smooth performance for many use cases. Our O-rings deliver durability, chemical resistance, and a perfect fit for every need. They’re the solution you need, whether you work on industrial machinery, automotive engines, or residential plumbing systems.

Buy High-Quality Rubber O-Rings in Bulk Today From Rubber Experts Inc

Find the exact O-rings you need, available in multiple materials, sizes, and industry-grade standards. Bulk ordering options are available for businesses that require reliable stock for maintenance and production purposes.

silicone o-rings for food-grade and medical applications

Silicone O-Rings

FDA-approved seals for extreme temps (-60°C to 230°C) and sterile environments

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EPDM rubber o-rings for automotive and HVAC systems

EPDM O-Rings

All-weather sealing solution resists UV, ozone, water, and steam up to 150°C.

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Neoprene o-rings with chemical resistance for industrial use

Neoprene O-Rings

Versatile general-purpose seals handle refrigerants, oils, and moderate chemicals.

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Fluorosilicone o-rings for aerospace and fuel applications

Fluorosilicone O-Rings

Aerospace-grade sealing for jet fuels, hydraulics, and extreme cold environments

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FKM Viton o-rings for high-temperature chemical resistance

FKM O-Rings

Premium chemical resistance up to 200°C for aggressive industrial environments

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HNBR hydrogenated nitrile o-rings for automotive applications

HNBR O-Rings

Heavy-duty sealing for high-pressure hydraulics and abrasive oil environments

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Buna-N NBR nitrile o-rings for oil and fuel systems

Buna (NBR) O-Rings

Industry-standard oil and fuel sealing with proven reliability and value

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Polyurethane o-rings with abrasion resistance for dynamic sealing

Polyurethane O-Rings

Maximum wear resistance for moving parts and high-friction applications

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Santoprene thermoplastic elastomer o-rings for automotive use

Santoprene O-Rings

Flexible TPV sealing for potable water and chemical processing systems

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Butyl rubber o-rings for vacuum and gas sealing applications

Butyl Rubber O-Rings

Ultra-low permeability sealing for vacuum systems and gas containment

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Natural rubber o-rings for water service and general sealing

Natural Rubber O-Rings

High-strength elasticity for water systems and non-petroleum applications

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AEM O-Rings

Automotive-grade sealing for engine oils and transmission fluids at high temps

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Why Choose Rubber Xperts for Your O-Ring Needs

Industry Expertise and Manufacturing Capabilities

  • Years of experience in hydraulic and pneumatic systems ensures high-performance rubber O-rings.
  • 10,000 square feet manufacturing facility equipped for large-scale production.
  • ISO-certified products meeting stringent international quality standards.

Comprehensive Product Range

  • Bulk and OEM Supply Options for industrial buyers requiring consistent inventory management
  • Custom Sizes and Materials available for specialized applications with unique requirements
  • Standard and Metric Dimensions ensuring global equipment compatibility>
  • Wide Material Selection from cost-effective NBR to high-performance Viton and specialty compounds

Service Excellence

  • Expert Technical Support - Our reliable technical team guides material selection, sizing, and application-specific requirements
  • Fast Nationwide Shipping - Ships to over 20 states monthly, keeping operations running smoothly
  • Secure Online Ordering - Easy procurement through our website or direct phone consultation
  • Flexible Solutions - Customized ordering and packaging preferences tailored to customer needs

Quality Assurance

  • ISO Certification ensures product reliability and compliance with the international standard
  • Material Testing - validates chemical resistance, temperature performance, and mechanical properties
  • Application Engineering - supports customers in optimizing seal selection for specific use cases.

Your Custom Rubber O-Rings Journey - From Selection to Delivery

01

Consultation and Selection

Technical review of your O-ring requirements

02

Quote and
Engineering

Detailed specifications and pricing

03

Custom
Manufacturing

Precision molding and quality testing

04

Quality Control and
Shipping

Final inspection and fast delivery

Total Turnaround: 7-10 business days | Express bulk O-rings available in 7-10 days

What Are Rubber O-Rings and Why Are They Essential?

Rubber O-rings are circular elastomer seals designed to fit into grooves and prevent the passage of liquids or gases. Also known as O-ring seals or O-ring gaskets, these flexible sealing elements create airtight and watertight barriers by compressing between two surfaces under pressure or movement.

Their primary function is maintaining leak-proof connections in industries ranging from plumbing and automotive to manufacturing and chemical processing. According to a Research Nester Report, the O-ring market in the aerospace equipment segment is expected to gain a 52% share by 2037, highlighting the critical role O-rings play in fueling industrial growth.

The elastomeric properties of O-rings allow them to deform and fill gaps while returning to their original shape, ensuring consistent sealing performance under varying conditions. This adaptability, combined with their cost-effectiveness and ease of installation, makes them indispensable components across countless applications.

rubber O-rings essential for sealing industrial and automotive components

What are the Different Types and Classifications of Rubber O-Rings?

The different types and classifications of rubber o-rings are highlighted below:

Static O-rings

static O-rings for fixed sealing in pipes and flanges

Static O-rings

Static O-rings are designed for stationary applications where there's no movement between sealed surfaces. These seals excel in pipelines, flanges, and valve covers, providing reliable containment without wear from motion. Static O-rings demonstrate exceptional longevity, with studies showing they last up to three times longer than dynamic seals under identical conditions due to reduced mechanical stress.

Dynamic O-rings

dynamic O-rings for hydraulic pistons and moving seal systems

Dynamic O-rings

Dynamic O-rings handle applications involving movement, such as hydraulic pistons, rotating shafts, and reciprocating machinery. These seals must withstand continuous friction while maintaining pressure integrity, requiring specialized materials like polyurethane or Viton for enhanced wear resistance.

Standard Torus O-Rings

standard torus O-rings for multipurpose industrial sealing

Standard Torus O-Rings

Standard Torus O-Rings feature the traditional circular cross-section and represent the most versatile sealing solution for both static and dynamic applications.

Square O-rings

square O-rings for high-pressure hydraulic and pneumatic sealing

Square O-rings

Square O-rings have a square cross-section designed to provide tighter seals and reduce rolling or extrusion under high pressure, making them ideal for precision hydraulic systems.

Specialized Shapes

specialized shape O-rings for advanced sealing and leak prevention

Specialized Shapes

Specialized Shapes include X-rings and quad rings that offer multiple sealing lips for enhanced leak protection in critical applications.

Food-Grade O-Rings

food-grade O-rings for sanitary processing and packaging machinery

Food-Grade O-Rings

Food-Grade O-Rings are manufactured using FDA-approved materials like silicone or EPDM, ensuring compliance with food safety standards for processing and packaging equipment.

Medical O-Rings

medical O-rings for sterile sealing in healthcare and laboratory equipment

Medical O-Rings

Medical O-Rings use biocompatible materials for sterile applications in syringes, pumps, and diagnostic equipment, maintaining patient safety and equipment reliability.

Automotive O-Rings

automotive O-rings for engines, transmissions, and brake systems

Automotive O-Rings

Automotive O-Rings withstand high temperatures, pressures, and exposure to oils and fuels in engines, transmissions, and braking systems.

Aerospace O-Rings

aerospace O-rings for aircraft fuel and hydraulic systems

Aerospace O-Rings

Aerospace O-Rings are engineered for extreme conditions in aircraft and spacecraft systems, providing reliable sealing for fuel systems, hydraulics, and cabin pressurization.

What Materials Are Used in Rubber O-Ring Manufacturing?

The common materials used in rubber o-ring manufacturing depend on the different applications to ensure optimal performance and longevity. The common materials are listed in the table below:

Material Temp Range Chemical Resistance Durability Cost Level Best Applications
NBR (Buna-N) -40°C to 120°C Oils and Fuels High Low Automotive, hydraulic systems
EPDM -50°C to 150°C Water, Steam, Weather High Medium Plumbing, HVAC, outdoor use
Viton/FKM -20°C to 200°C Solvents and Chemicals Very High High Chemical processing, aerospace
Silicone -60°C to 230°C Mild Chemicals and Heat Medium Medium Medical, food-grade, extreme temps
Neoprene -40°C to 120°C Weather and Abrasion Medium Medium General-purpose, refrigeration
Polyurethane -30°C to 80°C Abrasion and Wear Very High Medium Dynamic sealing, high-pressure
Fluorosilicone -65°C to 175°C Fuels and Low Temps High High Aerospace, fuel systems

How to Choose the Best Rubber O-ring Material

To choose the best rubber o-ring material, consider the following factors:

Temperature Requirements

Operating temperature range significantly impacts material choice. Silicone excels in extreme temperatures, while NBR suits moderate temperature applications cost-effectively.

Chemical Compatibility

Exposure to oils, fuels, solvents, or cleaning agents requires specific material properties. Viton handles aggressive chemicals, while EPDM resists water and steam.

Pressure Conditions

High-pressure applications demand robust materials like polyurethane or require backup rings to prevent extrusion and failure.

Dynamic vs Static Use

Moving applications need materials with enhanced wear resistance, while static seals can use more cost-effective options.

Regulatory Compliance

Food, medical, and pharmaceutical applications require FDA-approved materials like silicone or specific EPDM grades.

Where Are Rubber O-Rings Commonly Used?

Rubber o-rings are commonly used in the following sectors:

Automotive

O-rings are essential in engines, fuel injectors, brake systems, and transmission components. NBR and Viton materials handle exposure to oils, fuels, and high temperatures while maintaining reliable sealing performance. Critical applications include fuel system sealing, engine oil containment, and hydraulic brake fluid systems.

Industrial Manufacturing

Pumps, compressors, and hydraulic systems rely on O-rings for leak-free operation. These applications often involve high pressures and continuous operation, requiring durable materials like polyurethane for dynamic seals or EPDM for water-based systems.

Plumbing and HVAC

Water systems, pipe connections, and filtration equipment use O-rings to prevent leaks and maintain system pressure. EPDM excels in these applications due to its water resistance and UV stability for outdoor installations.

Food and Pharmaceutical

Processing machinery requires FDA-approved silicone or EPDM O-rings that withstand sterilization cycles and cleaning agents while maintaining food safety compliance. These seals prevent contamination and ensure product purity.

Chemical and Marine

Harsh environment sealing involves exposure to aggressive chemicals, saltwater, and extreme weather conditions. Viton and specialized fluoroelastomers provide the necessary chemical resistance for reliable long-term performance.

Aerospace and Defense

Critical sealing applications in fuel systems, hydraulics, and cabin pressurization demand materials like fluorosilicone that maintain integrity under extreme temperature variations and high pressures.

Electronics and Telecommunications

Environmental protection sealing prevents dust, moisture, and contaminant ingress in sensitive equipment. Silicone O-rings provide stable sealing while accommodating thermal expansion cycles.

How to Determine Rubber O-Ring Sizes

To determine the rubber o-ring sizes, consider the following O-ring dimensions:

measuring O-ring size for precise fitting in sealing applications
  • Inner Diameter (ID): Distance across the inside of the O-ring, determining fit around grooves or shafts
  • Outer Diameter (OD): Distance across the O-ring's exterior, ensuring proper housing compatibility
  • Cross-Section (CS): Thickness of the O-ring's circular body, affecting compression requirements

Standard Sizing Systems:

  • AS568 Sizes - Imperial measurements used primarily in North America
  • ISO 3601 - Metric measurements for global compatibility
  • Custom Sizes Available for specialized applications requiring non-standard dimensions

Measuring Tools:

  • Calipers for precise ID and OD measurements
  • O-ring sizing cones for cross-section determination
  • Sizing gauges for verification and quality control

Key Features and Benefits of Rubber O-Rings

The key features and benefits of the rubber o-rings Rubber Xperts Inc sells are highlighted below:

Reliable Leak Prevention Under Pressure

Provides superior airtight and watertight sealing to prevent fluid or gas leakage in critical systems such as engines, pipelines, and HVAC units.

Cost-Effective and Easy to Install or Replace

Simple design allows for quick maintenance, minimizing labor costs and operational interruptions.

Wide Size Availability in Standard and Metric Dimensions

Offers precise compatibility with global equipment and machinery, reducing the risk of seal failure.

Chemical & Heat Resistance for Harsh Environments

Withstand exposure to oils, fuels, steam, and solvents while performing in both high-temperature and cryogenic conditions.

Versatile for Multi-Industry Applications

Suitable for automotive, industrial, marine, chemical, and food-grade systems, supporting diverse operational needs.

How to Install Rubber O-Rings

To install Rubber O-rings, consider the following steps:

1

Step 1: Inspection and Preparation

Clean the groove and surrounding area thoroughly, removing debris, old lubricant, or metal shavings. Inspect the O-ring for cuts, cracks, or deformation that could compromise sealing integrity.

2

Step 2: Lubrication Application

Apply a compatible lubricant to reduce friction during installation. Use silicone-based grease for general applications or synthetic O-ring oil for specialized requirements. Ensure lubricant compatibility with the O-ring material and system fluids.

3

Step 3: Careful Positioning

Position the O-ring without excessive stretching or twisting. Use plastic installation picks from O-ring mounting kits to avoid damage. Roll the O-ring into place rather than pulling aggressively to prevent overstretching.

4

Step 4: Proper Seating

Ensure even seating in the groove with no pinching or bulging. Check alignment to maintain consistent compression across the entire circumference.

5

Step 5: System Testing

Test the assembly under operational conditions to verify sealing integrity. Perform pressure testing according to manufacturer specifications to confirm reliable performance.

Compression Guidelines

Follow these compression ratios to ensure effective sealing and longer O-rings life.

Static Applications

15-25% compression ratio ensures effective sealing without excessive stress

Dynamic Applications

10-20% compression balances sealing efficiency with reduced wear

Over-compression

Over-compression causes material fatigue and extrusion

Under-compression

Under-compression results in poor sealing and system leaks

How to Maintain Rubber O-rings

To maintain rubber o-rings, consider the following best practices:

Inspection Schedule

Implement routine visual inspections to identify wear, cracking, or deformation before failure occurs. Early detection prevents costly system downtime and equipment damage.

Cleaning Procedures

Use lint-free cloths and compatible solvents to maintain clean sealing surfaces. Proper cleaning prevents contamination that could compromise seal effectiveness.

Lubrication Maintenance

Reapply compatible lubricants during service intervals to reduce friction and extend O-ring life in dynamic applications.

Replacement Indicators

Replace O-rings showing signs of hardening, cracking, permanent deformation, or chemical degradation to maintain system reliability.

What are the common issues linked to rubber o-rings?

The common issues linked to rubber o-rings are listed below:

  • Premature Wear, which often results from improper material selection, inadequate lubrication, or misalignment. Solution: Verify material compatibility and installation procedures.
  • Chemical Degradation, which occurs when the O-ring material is incompatible with system fluids. Solution: Conduct compatibility testing and select appropriate materials.
  • Extrusion Failure occurs under high pressure when O-rings lack adequate support. Solution: Install backup rings or redesign groove specifications.
  • Temperature Damage that manifests as hardening or softening beyond material limits. Solution: Select materials with appropriate temperature ratings for the application.

How to test the rubber O-rings' performance and quality?

To test rubber o-rings' performance and quality, consider the following options:

Pressure Testing

Pressure Testing: verifies sealing integrity under operational conditions according to standards like ASTM F2378.

Chemical Compatibility Testing

Chemical Compatibility Testing follows ISO 1817 and ASTM D471 methods to ensure material resistance to operational fluids.

Temperature Cycling

Temperature Cycling: validates performance across expected operating temperature ranges

Compression Set Testing

Compression Set Testing measures material recovery after prolonged compression to predict service life.

Frequently Asked Questions

Here are some frequently asked questions about Rubber O-Rings to help you find the answers you need:

The main difference between an O-ring and a seal is that an O-ring is a specific type of circular sealing element, while a seal is a broader category encompassing various shapes and designs for containing fluids or gases.

You should use Rubber O-rings when the application requires a simple, versatile, and leak-proof solution for sealing under dynamic or static conditions. Conversely, Gaskets are better suited for flat surfaces or irregular shapes requiring a broader sealing area. Rubber O-rings are ideal for pressure systems and fluid containment, while gaskets excel in applications like machinery gaskets or flanged connections.

Yes, rubber O-ring seals can be made from eco-friendly materials by using sustainable rubber compound types derived from natural or recycled sources. Natural rubber or biodegradable alternatives are formulated to meet specific sealing needs, although they might have chemical or heat resistance limitations compared to synthetic rubbers like Viton (FKM). These eco-friendly solutions are increasingly popular in industries prioritising sustainability without compromising seal performance tracking.

Viton/FKM and EPDM O-rings perform best in chemical-heavy environments. Viton excels against solvents and fuels, while EPDM is suitable for water, steam, and some mild chemicals.

Viton/FKM is the most reliable for solvents and fuels, while NBR is suitable for oils and standard fuels but not for harsh chemicals.

Yes. Silicone O-rings can tolerate extreme cold (-60°C), and Viton/FKM can handle up to 200°C or more.

EPDM and Neoprene O-rings are excellent for UV, weather, and marine exposure.

Inspect quarterly for critical systems and replace annually or sooner if exposed to high pressure, heat, or chemicals.

Yes. Rubber Xperts Inc offers custom O-rings and seals for regulated industries and can meet ISO, ASTM, and FDA requirements.

Common causes include over-compression, chemical attack, heat degradation, and improper storage. Use compatible materials and follow installation best practices.

Yes. Store in a cool, dry, and dark place, away from UV exposure, ozone, or chemical vapors.

Yes. We provide bulk supply and OEM support with competitive pricing for industrial buyers.

It’s not recommended. O-rings may deform or pick up debris; replacing them ensures a reliable seal.

Measure the inner diameter (ID), outer diameter (OD), and cross-section using a caliper or O-ring sizing chart.

Yes. Silicone and Viton/FKM O-rings handle the highest temperature ranges.

Replacement depends on material and application. In standard conditions, annual inspection and replacement are recommended.

Yes. Contact us for custom O-ring kits, bulk options, and special size orders.

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Customer Reviews and Testimonials

John Miller client testimonial photo representing customer satisfaction

Ryne Pfeifer

"We recently purchased rubber gaskets from Rubber Xperts INC. and were thoroughly impressed with their service. The team demonstrated a high level of professionalism and ensured we received top-quality products. Their assistance throughout the process was invaluable, and they delivered everything on time. We highly recommend Rubber Xperts INC. for their exceptional quality and outstanding customer support."

Remya Varughese

"Our dairy organization has been partnering with Rubber Xperts INC. for a while now, and we frequently procure silicone dairy hoses from them. Their customer service and engineering team are outstanding, always ensuring we receive the best products and support. This partnership has been a great success, and we highly recommend Rubber Xperts INC. for their professionalism, quality, and reliability."

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