Xiamen Better Silicone Rubber Co., Ltd

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Xiamen Better Silicone Rubber Co,.Ltd
Contact person:
Candice Wu
Email: sales@better-silicone.com


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NBR Gasket & Seal

NBR Gasket, also known as NBR Seal, Buna-N Gasket, Nitrile Rubber Gasket, Nitrile Rubber Seal, NBR Seal, Which were produced by compression mold with Buna-N, Nitrile Rubber Material, which are usually produced by silicone rubber compression molding, extrusion moulding or rubber injection moulding. NBR Gaskets are quite common in industrial and automotive applications.
  • ERB-1

  • Better

  • 3924100000


NBR Gasket & Seal

NBR Gasket, also known as NBR Seal, Buna-N Gasket, Nitrile Rubber Gasket, Nitrile Rubber Seal, NBR Seal, Which were produced by compression mold with Buna-N, Nitrile Rubber Material, which are usually produced by silicone rubber compression molding, extrusion moulding or rubber injection moulding.  NBR Gaskets are quite common in industrial and automotive applications.

NBR Gaskets

NBR Gasket & Seal Material

NBR Gasket Material, also known as Nitrile rubber, Buna-N, and acrylonitrile butadiene rubber, is a synthetic rubber copolymer of acrylonitrile (ACN) and butadiene. NBR Gasket's chemical stability is good, processing performance is good, with its structure of acrylonitrile content in the relative density increases, the curing speed, tensile strength increased, but resilience would decline, cold resistance variation.Since the cyano in NBR is easy to polarize, the dielectric property is reduced, which is a semiconductor rubber. NBR can be divided into high, high, medium and low acrylonitrile by ACN content. It is used in the automotive and aeronautical industry to make fuel and oil handling hoses, seals, grommets, and self-sealing fuel tanks, since ordinary rubbers cannot be used. It is used in the nuclear industry to make protective gloves.

Notes: FDA NBR/ Nitrile Rubber is sturdy enough to handle suction and discharge for food and dairy products. It withstands temperatures of -40°F to 212°F.  FDA NBR known for its high resistance to animal fat and vegetable oils. FDA Nitrile (Buna-N, NBR) is typically black or white in color.

FDA NBR/ Nitrile Rubber Material Report.PDF

NBR Gasket & Seal Advantages

NBR Gasket has good Oil resistance: NBR is a synthetic rubber that is resistant to oil (especially alkane oil) and has good aging resistance. NBR has excellent oil resistance which is superior to natural rubber, chloroprene rubber and styrene butadiene rubber. In general rubber, NBR’s resistance to benzene, petroleum base oil and nonpolar solvents (such as mineral oil, liquid fuel, animal and plant oil and solvent) is far superior to the performance of nonpolar rubber, like NR, SBR, IIR,CR, while NBR isn’t resistant to polar solvents and polar oil.

NBR Sealing

NBR Gasket has good Ozone Resistance : the disadvantage of NBR is that it is not resistant to ozone and aromatic, halogenated hydrocarbon, ketone and ester solvents.

NBR Gasket also has good physical properties such as resistance to compression set, tearing, and abrasion. Typically, NBR or Buna-N comes in durometers (Shore A) ranging from 20 to 95 for applications that require a softer or harder rubber. Nitrile resists water, but provides poor resistance to weather, ozone, and aging. Acrylonitrile butadiene is also unsuitable for some applications because Buna-N won’t withstand temperatures that are colder than -40° F (-40° C)

Caution: Nitrile Rubber Gasket should not be used in applications involving highly polar solvents such as acetone, MEK, ozone, chlorinated hydrocarbons and nitro hydrocarbons.

Temperature Range
Aging Weathering, Ozone
Anti-Oil & Grease
Anti Water Swell
Economy of Material
Material Notes

Chloroprene & Neoprene


-40F to 250F

Excellent Good Exprosure to refrigerants, can be compounded for FDA applications
-22F to 212F Poor
Excellent Good
Good Excellent Excellent resistance to petroleum based oils and hydrocarbon fuels



-60F to 300F Excellent
Excellent Good Excellent /
-75F to 450F Excellent Average
Excellent Excellent Average Medical and aerospace applications
5F to 390F Excellent Excellent Good Average Poor /

NBR Gasket & Seal Uses

  • Scientific Research & Pharmaceutical Equipment

  • Door And Windows Seal

  • Food Processing Equipment

  • Glass/Shower Door Seal

  • Oven Gasket

  • Optial Fiber Cable

  • Military Device & Equipment

  • Connector for Electrical Parts

  • Gaskets for Fuel Tanks, Boilers And Other Closed Vessel

  • Water Filteration And Purification Equipment

  • Dairy fluid handling tubing

  • Peristaltic tubing

  • Automotive electrical enclosure seal

  • Electrical connector

  • High voltage insulation

  Nitrile Rubber Gaskets  Buna-N Gaskets

Our company advantages for NBR Gasket manufacturing process:

1. Precision Own Mold-making Technology since 1998:

Industry Standards of ruuber products' flash is ±0.2mm;

Industry Standards of silicone products' flash is ±0.1mm;

The  Food Grade NBR product we produced is only with 0.07-0.08mm.

Food Grade NBR

NBR Gasket

2. In-depth knowledge of different elastomer rubber materials molded for rubber gasket, NBR Gasket & seals

3. Mature experience of various silicone rubber gaskets quality controls:

4. Rapid prototyping with full sizes production equipment and production materials.

5. In-depth knowledge of overmolded metal + Silicone Rubber Gasket production

xiamen better silicone Rubber co,ltd


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Contacts with us

  86-18159020626
Do you have 3D drawing or sample? so that we can estimate the price for you.You can contact me at my e-mail address:
 Room No. 513-515, 5F, Culture Creative Park,
No.10 Huli Avenue, Huli District, Xiamen, China.(office)
 2F, No. 165, Tong'an Park, Industry cluster zone, Tong'an District, Xiamen, China (factory)
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