Nitrile (Buna-N) Gaskets Acrylonitrile Butadiene (NBR)

Custom Gasket Mfg. is a leading supplier of high-quality nitrile (buna-n) rubber gaskets, seals, and custom nitrile products.

Our company’s reputation for excellence has been built on our ability to provide our valued customers with the most effective manufacturing solutions to meet their most demanding applications. Our main objective is to continuously exceed our customer’s expectations by providing them with high-performance gaskets and sealing products, competitive pricing, on-time delivery and exceptional customer service. Custom Gasket Mfg. is committed to consistently meet all of your blueprint specifications and tolerance requirements.

Custom Gasket Mfg. specializes in precision die cut and molded nitrile (buna-n) rubber gaskets and seals for applications and industries worldwide. Nitrile rubber, also known as Buna-N and NBR, is the most widely used elastomer for gaskets and seals. Its properties provide excellent resistance to oils, solvents, gasoline, and petroleum based fluids. Due to its resilience, nitrile is used in applications requiring resistance to extreme hot and cold temperatures, abrasion, water, and gas permeability. Nitrile rubber functions well in temperatures ranging from -40°F to +212°F, intermittent to +230°F.

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Die Cut Nitrile (Buna-N) Gaskets

Die Cut Nitrile (Buna-N) Gaskets

Custom Gasket Mfg. provides die cut nitrile gaskets in a wide variety of grades, thicknesses and hardness. The standard thickness of nitrile rubber ranges from 1/64″ to 1/4″ thick. Nitrile rubbers hardness (durometer) generally ranges from 30 to 90 durometer, Shore A. Die cut nitrile gaskets are black in color however our FDA (Food Grade) nitrile gaskets are also offered in white. Nitrile gaskets are available with or without pressure sensitive adhesive (PSA) backing.

Custom Gasket Mfg. Available Nitrile Grades

  • Transformer Oil Nitrile (Buna-N)
  • Bio-Diesel Nitrile (Buna-N)
  • Nitrile (Buna-N) Sponge

Molded Nitrile, Buna-N Gaskets (NBR)

Nitrile Molded Gaskets and Seals

Custom Gasket Mfg. specializes in molded nitrile gaskets and seals. Our custom nitrile molding capabilities include Compression Molding, Transfer Molding, and Rubber Injection Molding. Nitrile (NBR) compounds are available from 40 to 90 durometer, Shore A. Molded nitrile gaskets are usually black in color, however custom color compounding is available. Food Grade “FDA Approved” Nitrile (NBR) and Hydrogenated Acryonitrile (HNBR), also referred to as Highly Saturated Nitrile (HSN), are also universal molding compounds that are frequently used. Nitrile rubber molding tolerances are compliant with rubber molding industry standard RMA A2 Precision tolerances.

Please visit our gasket materials page for more information on our extensive selection of materials.

For more information on custom nitrile (buna-n) rubber products or to speak with one of our knowledgeable professionals, please feel free to Contact Us or complete our online Request For Quote form.

Call 800-985-6750 or email your inquiry to