Nitrile Rubber Gasket
Professional manufacturer of custom nitrile rubber gaskets, NBR gaskets, and Buna-N gaskets. Available in various sizes, hardness levels, and material grades for fuel-resistant, oil-resistant, and industrial sealing applications.
What Is a Nitrile Rubber Gasket?
Nitrile rubber gaskets, also known as NBR gaskets or Buna-N gaskets, are widely used for oil-resistant sealing applications.
“Nitrile gasket” is the common name for a Nitrile Butadiene Rubber (NBR) gasket. The material, NBR, is a synthetic rubber made from butadiene and acrylonitrile, with its primary advantage being excellent resistance to oils, fuels, and petroleum-based fluids.
Premium Custom Nitrile (NBR) Gasket Manufacturer: Ultimate Oil Resistance
Nitrile rubber is specifically engineered for applications involving oils, fuels, and petrochemical environments. As a leading nitrile gasket manufacturer and a factory-direct OEM rubber parts manufacturer, we understand that sealing failure is absolutely unacceptable when handling hydrocarbons.
Whether your drawings refer to them as Buna-N gaskets, nitrile rubber gaskets, or standard NBR gaskets, we can fully customize and manufacture them to your exact requirements. Our rigorously tested elastomer solutions are designed to deliver reliable performance in demanding fluid systems.
From precision die-cut flange gaskets to complex molded 3D rubber seals, we provide the exact custom nitrile gaskets your application requires, ensuring dependable sealing performance and long-term durability.
NBR, Nitrile, or Buna-N Gaskets: What’s the Difference?
When sourcing oil-resistant sealing components, procurement managers and engineers often encounter a variety of confusing material names on both 2D and 3D engineering drawings. It is common to wonder whether these terms refer to the same material, represent different compounds, or have been incorrectly specified altogether.
A frequent question is:
Is there any functional difference between nitrile rubber gaskets and Buna-N gaskets? If so, what are the differences?
Understanding the terminology can help your team make accurate purchasing decisions without wasting valuable time and resources.
The Short Answer: No.
They are exactly the same synthetic elastomer.
Below is a quick guide to help clarify the industry terminology so you can confidently source either custom Buna gaskets or standard nitrile gaskets.
Nitrile
Nitrile is the most common and widely accepted chemical name for the material. When buyers are looking for fluid-resistant sealing solutions, they often search for a reliable nitrile gasket manufacturer to produce their nitrile gasket or nitrile gaskets.
NBR
NBR stands for Nitrile Butadiene Rubber. It is the official abbreviation used in international standards such as ISO and ASTM.
Modern technical specifications and many European engineering drawings typically call for:
- NBR gasket
- NBR gaskets
- NBR rubber gasket
These terms all refer to the same material family.
Buna-N
Buna-N is a historical trade name dating back to the early development of synthetic rubber during the World War II era.
Despite its age, many legacy American manufacturing, automotive, aerospace, and industrial drawings still specify:
- Buna gasket
- Buna-N gasket
- Buna-N rubber gasket
As a result, these terms remain widely used throughout industry today.
Why So Many Different Names?
Because of the material’s long industrial history, it is common to see these terms used interchangeably—even within the same document.
Examples include:
- Nitrile Buna-N gaskets
- Nitrile Buna rubber gaskets
- NBR Buna-N seals
In virtually all cases, they refer to the same base elastomer: Nitrile Butadiene Rubber (NBR).
Conclusion
Whether your engineering team requires high-volume Buna gaskets, precision die-cut Buna rubber gasket rings, or heavy-duty NBR rubber gaskets, they are all referring to the same excellent oil-resistant elastomer compound.
As your dedicated manufacturing partner, we have the material science expertise and production capabilities to ensure that the exact material specified on your drawing is accurately manufactured and delivered to your application requirements.
The Secret to Nitrile Performance: Acrylonitrile (ACN) Content
When to Use (and When to Avoid) Nitrile Rubber Gaskets
To prevent catastrophic leaks and costly system downtime, selecting the correct elastomer is critical. While nitrile rubber gaskets perform exceptionally well in hydrocarbon-based environments, they are not a universal sealing solution. As a transparent and responsible nitrile gasket manufacturer, we clearly define the operating limits of our materials.
🟢 Green Zone: Where Nitrile Rubber Excels
When exposed to the following media, our Buna-N rubber gasket compounds deliver reliable sealing performance and long-term durability:
Petroleum-Based Fluids
- Engine oils
- Gear lubricants
- Industrial transmission fluids
Fuels
- Gasoline
- Diesel fuel
- Aviation fuels (especially with our high-ACN formulations)
Hydraulic Fluids
- Standard petroleum-based hydraulic oils
- Water-glycol hydraulic mixtures
General Industrial Media
- Potable water at ambient temperatures
- Silicone greases
- Diluted acids
In these applications, NBR provides an excellent balance of oil resistance, compression-set performance, and cost-effectiveness.
🔴 Red Zone: Important Engineering Limitations
We strongly recommend avoiding nitrile gaskets in the following applications:
Outdoor Weathering & UV Exposure
Nitrile rubber has poor resistance to ozone, direct sunlight, and prolonged weather exposure. Outdoor use can lead to rapid hardening, cracking, and premature seal failure.
For exterior weatherproof sealing applications, we strongly recommend our custom EPDM rubber gaskets, which are specifically engineered for long-term UV and ozone resistance.
Extreme High Temperatures
Standard Buna-N compounds begin to degrade rapidly at temperatures above +120°C (+248°F).
If your application involves:
- High-temperature engines
- Turbochargers
- Aerospace systems
- Industrial thermal processing equipment
you should upgrade to our high-performance FKM seals, which offer significantly better heat resistance.
Aggressive Chemical Environments
NBR is not suitable for exposure to:
- Strong concentrated acids
- Ketones (such as MEK)
- Halogenated hydrocarbons
- Highly aggressive solvents
In these environments, nitrile compounds may swell, soften, or chemically degrade, leading to sealing failure.
For demanding chemical-processing applications, we recommend upgrading to our specialty FKM gaskets or FFKM gaskets, which provide superior chemical resistance and long-term reliability.
Engineering Recommendation
A gasket material should never be selected based solely on cost or familiarity. The most reliable sealing system is achieved by matching the elastomer chemistry to the actual operating environment. Whether your application involves oils, fuels, outdoor exposure, high temperatures, or aggressive chemicals, our engineering team can help you select the optimal sealing material to maximize service life and minimize operational risk.
Advanced Manufacturing for Custom Nitrile Gaskets
As a factory-direct OEM nitrile gasket maker, RiseUp controls the entire production lifecycle—from custom polymer compounding to final dimensional inspection and mass production delivery. Utilizing advanced German-made KraussMaffei manufacturing equipment, we produce custom nitrile gaskets ranging from rapid prototypes to high-volume production runs, precisely matching your engineering drawings and specifications
High-Speed Precision Die-Cutting
High-Speed Precision Die-CuttingThe most cost-effective solution for flat flange gaskets, washers, and spacer rings.
We utilize advanced CNC tool-less flash cutting for rapid prototyping—eliminating the need for tooling during the development stage—and high-speed rotary die-cutting systems for large-scale production of flat custom Buna gaskets with exceptional consistency and efficiency.
Precision Rubber Molding (Compression Molding & Injection Molding)
Precision Rubber Molding (When flat-cut components are not sufficient, we engineer complex 3D geometries and sealing structures.
This process is ideal for manufacturing:
- Complex NBR rubber gaskets
- Ribbed pump seals
- Precision O-rings
- Custom fluid sealing components
All produced to strict RMA dimensional tolerances for critical sealing applications.
Specialty Compounding (FDA White Nitrile)
Specialty Compounding (FDA White Nitrile)We do more than mold rubber—we engineer the exact compound your application requires.
In addition to standard industrial black NBR, we formulate premium FDA-compliant white nitrile gaskets specifically for:
- Food processing equipment
- Dairy production systems
- Pharmaceutical machinery
These compounds provide excellent resistance to animal fats and vegetable oils while ensuring zero harmful substance migration, no odor transfer, and full compliance with food-contact requirements.
Pressure-Sensitive Adhesive (PSA) Integration
Pressure-Sensitive Adhesive (PSA) IntegrationTo streamline your assembly process, we can laminate high-performance pressure-sensitive adhesives—such as 3M acrylic adhesive systems—directly onto your Buna-N gaskets before cutting.
The result is a reliable peel-and-stick sealing solution that:
- Simplifies installation
- Reduces assembly time
- Improves positioning accuracy
- Enhances manufacturing efficiency
Proven Applications Across Heavy-Duty Industries
When a seal fails, it can lead to catastrophic leaks, environmental hazards, or costly system downtime. As an experienced nitrile gasket manufacturer, we provide heavy-duty elastomer sealing solutions for a wide range of high-risk industries.
Oil & Gas Processing
We manufacture high-ACN nbr gaskets designed to seal heavy-duty pipeline flanges, industrial pumps, and petrochemical valves, enduring constant exposure to unrefined hydrocarbons and drilling muds
Automotive & Transportation
From fuel system O-rings and carburetor seals to heavy-duty engine bay insulation, our buna n gaskets reliably resist modern motor oils, diesel fuels, and transmission fluids under constant engine vibration。They help prevent leaks and ensure reliable sealing performance in valve covers, oil pans, and engine components.
Aerospace & Aviation
Aviation standards require zero-compromise seals. We die-cut precision buna rubber gasket profiles for aviation fuel lines and hydraulic landing gear systems, ensuring absolute fluid containment at high altitudes
Industrial Hydraulics & Pneumatics
Heavy machinery relies on fluid power. We mold highly durable nitrile buna rubber gaskets and chevron seals that withstand the immense mechanical pressure of industrial hydraulic cylinders and pneumatic actuators without extruding. Nitrile rubber gaskets offer excellent oil resistance and durability, making them ideal for hydraulic cylinders, pumps, and power units
Food, Beverage & Dairy Processing:
Leveraging our specialized white compounding capabilities, we supply FDA-compliant nitrile gaskets for commercial dairy pumps, brewery valves, and meat processing equipment, effectively resisting animal fats while maintaining strict sanitary standards
Frequently Asked Questions About Nitrile & Buna-N Gaskets
Neoprene (CR) is a general-purpose rubber with moderate oil and good weather resistance. NBR (Nitrile) is the ultimate specialist for extreme oil and fuel resistance, but fails quickly outdoors. Choose NBR for engines and fuels; choose Neoprene for general outdoor exposure.
No. This is a common engineering mistake. Modern automotive brake fluids (DOT 3, 4, and 5.1) are glycol-based and will rapidly degrade and swell nitrile rubber gaskets. For brake systems, you must specify custom epdm rubber gasket
We custom-compound buna n gaskets in durometers ranging from a soft 40 Shore A to a rigid 90 Shore A. 70 Shore A is the industry standard for most industrial hydraulic and automotive fluid sealing applications.
Standard NBR operates reliably up to +100°C to +120°C (+212°F to +248°F) depending on the specific ACN grade. If your application involves continuous heat exceeding +120°C, you should upgrade to fkm rubber gasket
According to ARP5316 standards, NBR elastomers have a shelf life of up to 15 years if stored correctly. To maximize longevity, keep your nbr gaskets in a cool, dark environment away from direct UV sunlight, heat sources, and ozone-generating electrical equipment.
Yes. Beyond standard black industrial grades, we specifically compound white FDA-compliant nitrile gaskets. These are engineered for dairy, brewery, and food processing systems to resist animal fats with absolutely zero toxic leaching.
Yes. We can laminate high-performance pressure-sensitive adhesives (such as 3M acrylics) to our flat die-cut buna gaskets. This provides a highly efficient “peel-and-stick” solution that dramatically speeds up your assembly line.
Yes. If you only have an old, physical sample, ship it to our engineering team. We will measure the dimensions, analyze the durometer, and manufacture perfectly fitting custom buna gaskets to match or exceed your original OEM specs.
RiseUp is a direct-to-OEM nitrile gasket manufacturer and custom rubber parts manufacturer. You bypass trading markups, get direct factory pricing, and maintain 100% engineering control over your custom nitrile gaskets.
We offer flexible scaling. For flat die-cut nbr rubber gaskets, we support rapid prototyping in 3 to 5 days. For high-volume precision molded seals, typical production lead times are 2 to 3 weeks after sample approval.
MOQ 500 pcs, Accept Customization for Small Order. Design Products as Your Idea.
Releted Products
Package Method
"Take The Efficient 2026 Booster For Your Business Now "
Alan Chen
Product Sales Manager & Rubber Specialist at RISEUP
