What is cork nitrile and what is it used for?

Cork nitrile is a composite material that combines the excellent sealing properties of natural cork with the superior oil and fuel resistance of nitrile. It is primarily used for gaskets, seals, and automotive, hydraulic, and industrial machinery applications. Available in fine grain (for precision sealing) and coarse grain (for greater compressibility).

What is the difference between fine grain and coarse grain?

The main difference between fine grain and coarse grain is their texture and compressibility. Fine grain has a smoother, more uniform surface for precision sealing on regular surfaces, ideal for engine gaskets and valve covers. Coarse grain has a rougher, more porous surface for greater compressibility on irregular surfaces, ideal for industrial gaskets and heavy machinery seals.

Cork Nitrile | Fine & Coarse Grain for Industrial Sealing

The cork nitrile you need for gaskets, seals, and automotive and industrial applications. Excellent oil and fuel resistance. 60-65 Shore A hardness. Available in fine and coarse grain. Get a quote in 24 hrs!

Cork Nitrile | Oil-Resistant Sealing in Fine and Coarse Grain

Looking for a material that offers reliable sealing and oil resistance? Cork nitrile is the solution you need. This composite material combines the excellent sealing properties of natural cork with the superior oil and fuel resistance of nitrile, creating an ideal material for gaskets, seals, and gasketing in industrial and automotive environments.

Available in two variants: fine grain (for precision sealing on smooth surfaces) and coarse grain (for greater compressibility on irregular surfaces). With a hardness of 60-65 Shore A and a wide temperature range of -20°C to 120°C, cork nitrile is perfect for engine gaskets, hydraulic systems, and automotive applications requiring reliable sealing against oils, fuels, and lubricants.

Available in cork sheets and cork plates with ASTM certification. Need cork nitrile for your project? Keep reading to discover all the advantages of our cork nitrile in fine and coarse grain.

Cork Nitrile in Fine and Coarse Grain - Everest Group

Cork Nitrile Properties for Industrial Sealing

Cork nitrile stands out for its excellent sealing properties and chemical resistance, available in fine grain and coarse grain:

Excellent oil and fuel resistance: Ideal for engine gaskets, hydraulic systems, and automotive applications.
Fine vs coarse grain: Fine grain offers precision sealing on smooth surfaces; coarse grain provides greater compressibility on irregular surfaces.
Wide temperature range (-20°C to 120°C): Maintains its sealing properties in varying conditions, ideal for cork sheets and cork plates in industrial applications.
Good acid and alkali resistance: Perfect for industrial environments with chemical exposure.
Excellent sealing and compressibility: Adapts to irregular surfaces, ensuring reliable sealing.
Damping and vibration absorption properties: Reduces noise and vibrations in industrial equipment and heavy machinery.

These properties make cork nitrile an indispensable material in automotive applications, hydraulic systems, engine gaskets, and any environment requiring reliable sealing against oils and industrial fluids.

Cork Nitrile Technical Data Sheet

Technical specifications of cork nitrile in fine and coarse grain for industrial sealing

PHYSICAL PROPERTIES
PARAMETERS	METHOD	SPECIFICATIONS
SHORE A HARDNESS	ASTM-D2240	60 - 65
TENSILE STRENGTH, psi	ASTM-D412	350 MINIMUM
ELONGATION, %	ASTM-D412	100 MINIMUM
TEMPERATURE RANGE, °C	ASTM-D573	-20 TO 120

CHEMICAL PROPERTIES
SUBSTANCES	METHOD	SPECIFICATIONS
ACID AND ALKALI RESISTANCE	ASTM-D471	GOOD
OIL RESISTANCE	ASTM-D471	EXCELLENT
FUEL RESISTANCE	ASTM-D471	EXCELLENT

Grain Variants

Fine Grain: Ideal for precision sealing on smooth surfaces, such as engine gaskets and hydraulic systems.

Coarse Grain: Perfect for greater compressibility on irregular surfaces, such as industrial gaskets and heavy machinery seals.

Cork Nitrile Applications | Uses in Industrial Sealing

Discover the sectors where cork nitrile is essential for sealing against oils and industrial fluids

Automotive Industry

Cork nitrile is ideal for engine gaskets, valve covers, oil systems, and fuel systems. Its oil resistance and sealing capability make it perfect for demanding automotive applications. Available in fine grain for precision sealing.

Hydraulic Systems

Cork nitrile is the preferred choice for hydraulic pump gaskets, cylinders, and lubrication systems. Its compressibility and fluid resistance ensure reliable sealing in high-pressure hydraulic systems.

Industrial Machinery & Equipment

Cork nitrile is used in gaskets and seals for industrial equipment and heavy machinery. Its coarse grain offers greater compressibility on irregular surfaces, ideal for machinery seals and industrial components.

More applications for cork nitrile

Cork nitrile is also used in cork sheets and cork plates for vibration isolation, pipe gaskets, cooling systems, and pumping equipment. Its versatility, oil resistance, and sealing capability make it the preferred material for applications where reliability and durability are priorities.

Cork Nitrile Benefits | Why Choose It?

Advantages that make cork nitrile the best choice for sealing against oils and industrial fluids

Excellent Oil and Fuel Resistance

Cork nitrile offers superior resistance to oils, fuels, and lubricants, ideal for engine gaskets, hydraulic systems, and automotive applications.

Wide Temperature Range (-20°C to 120°C)

Operates efficiently from -20°C to 120°C, maintaining its sealing properties in varying conditions, ideal for cork sheets and cork plates in industrial applications.

Excellent Sealing Capability

Cork nitrile offers great compressibility and sealing capability on irregular surfaces, available in fine grain (precision) and coarse grain (greater compressibility).

Good Chemical Resistance

Resistant to acids, alkalis, and industrial chemicals, ensuring durability in demanding industrial environments.

Controlled Hardness (60-65 Shore A)

60-65 Shore A hardness for a perfect balance between flexibility and strength, ideal for gaskets and seals in industrial machinery.

Natural Cork Properties

Combines the advantages of natural cork (compressibility, damping) with nitrile's oil resistance, offering a versatile and durable material.

Reliability in Industrial Sealing

Cork nitrile from Everest Group combines oil resistance, wide temperature range, and excellent sealing capability to deliver exceptional performance in automotive applications, hydraulic systems, and industrial machinery. Available in fine grain and coarse grain, ASTM certified, it guarantees safety, durability, and reliability in the most demanding applications.

Cork Nitrile Certifications & Standards

Materials certified under international standards for industrial sealing and oil resistance

ASTM D2240

Shore A Hardness

Certifies cork nitrile hardness at 60-65 Shore A, ensuring the balance between flexibility and strength for gaskets and seals.

ASTM D412

Mechanical Properties

Certifies 350 psi tensile strength and 100% elongation, ensuring durability in cork sheets and cork plates.

ASTM D471

Chemical Resistance

Certifies excellent oil resistance and good acid and alkali resistance of cork nitrile, ideal for industrial sealing.

Need a certified material for oil-resistant sealing? Our ASTM cork nitrile guarantees maximum reliability and durability in automotive gaskets, hydraulic systems, and industrial machinery applications. Contact us for technical support.

Cork Nitrile: Fine Grain vs Coarse Grain

Choose the right variant for your sealing application

Fine Grain

Texture: Smoother, more uniform surface
Compressibility: Lower, ideal for regular surfaces
Sealing: Precise in high-demand applications
Ideal for: Engine gaskets, valve covers, hydraulic systems, and precision automotive applications
Advantage: Greater wear resistance on smooth surfaces

Recommended for precision

Coarse Grain

Texture: Rougher, more porous surface
Compressibility: Higher, ideal for irregular surfaces
Sealing: Effective in high-compression applications
Ideal for: Industrial gaskets, heavy machinery seals, pipe gaskets, and high-compression applications
Advantage: Better adaptation to surfaces with imperfections

Recommended for compressibility

Not sure which variant to choose? Both grades offer the same oil resistance and temperature range. The choice depends on the sealing surface: fine grain is for smooth surfaces, coarse grain is for irregular or imperfect surfaces. At Everest Group, we advise you to choose the right option for your project. Contact us.

Need Cork Nitrile in Fine or Coarse Grain for Your Project?

At Everest Group, we have the solution you are looking for. From cork sheets and cork plates in fine and coarse grain to custom gaskets and seals. Excellent oil and fuel resistance. ASTM certified. Get a quote in 24 hrs!

Request a Quote

Frequently Asked Questions

Do you have questions about cork nitrile? At Everest Group, we have compiled the most common questions and their answers for you. Just select a question and you will see the answer immediately.

Cork nitrile is a composite material that combines the excellent sealing properties of natural cork with the superior oil and fuel resistance of nitrile. It is primarily used for gaskets, seals, and gasketing in automotive, hydraulic systems, and industrial machinery applications. Available in fine grain (for precision sealing) and coarse grain (for greater compressibility).

The main difference between fine grain and coarse grain is their texture and compressibility:

Fine grain: Smoother, more uniform surface. Offers precision sealing on regular surfaces. Ideal for engine gaskets, valve covers, and hydraulic systems.
Coarse grain: Rougher, more porous surface. Offers greater compressibility on irregular surfaces. Ideal for industrial gaskets, heavy machinery seals, and pipe gaskets.

Both grades offer the same oil resistance and temperature range (-20°C to 120°C).

Yes, absolutely. Cork nitrile is formulated with nitrile, which is known for its excellent oil, fuel, and lubricant resistance. This makes it the preferred choice for automotive applications, hydraulic systems, and any environment with exposure to industrial fluids. Its oil resistance is ASTM D471 certified.

Cork nitrile is available in cork sheets and cork plates in different thicknesses and sizes. We also offer custom cutting and custom gasket fabrication in fine grain and coarse grain to suit each project's specific needs. To learn about available options and receive a personalized quote, we invite you to contact us.

Yes. Everest Group's cork nitrile complies with ASTM D2240 (Shore A Hardness), ASTM D412 (Mechanical Properties), and ASTM D471 (Chemical Resistance). These certifications guarantee the quality, reliability, and safety of the material in industrial sealing and oil resistance applications.

Yes. Everest Group ships cork nitrile sheets and plates throughout the United States, Canada, Mexico, Central America, and Spain. Delivery time depends on location and product availability. Contact us for shipping times and costs to your location.