Can you make custom gaskets to my exact dimensions?

Yes. We cut custom gaskets to the dimensions you specify. Enter your measurements in the online configurator, choose your material (Neoprene, Silicone, EPDM, Buna-N, Cork, or Fiber), and get an instant price. Custom gaskets ship within one business day after the order is placed. Larger orders may require additional time. No minimum order.

Do you cut custom flange gaskets with bolt holes?

Yes. Our Flange Gasket template lets you specify the outer diameter, inner diameter (bore), bolt circle diameter, number of bolt holes, and bolt hole size. We cut custom flange gaskets in Neoprene, Silicone, EPDM, Buna-N (NBR), Cork, and Fiber/Compressed Gasket Paper with instant online pricing.

Can you cut circular disk gaskets and ring gaskets?

Yes. We cut circular disk gaskets (solid discs) and ring gaskets (annular rings with a center bore) up to 32.5 inches in diameter. Neoprene, Silicone, EPDM, Buna-N, and Cork all available.

Do you cut rectangular gaskets and square gaskets?

Yes. We cut flat rectangular gaskets, square gaskets, and rounded-corner rectangular gaskets to your exact dimensions. Available in Neoprene, Silicone, EPDM, Buna-N (NBR), Cork, and Fiber/Compressed Gasket Paper. Maximum part size 32.5 x 32.5 inches.

What elastomer gasket materials do you cut?

We cut custom elastomer flat gaskets in Neoprene (CR), Silicone, Buna-N (NBR), EPDM, Cork, and Fiber/Compressed Gasket Paper. Each material is available in multiple thicknesses.

How do I get an instant price for a custom cut gasket?

Use the configurator on this page. Select your gasket shape, pick a material and thickness, enter your dimensions, and the price updates live - no quote request, no email, no back-and-forth. Add directly to cart.

What gasket shapes can you cut?

We cut over 30 shapes: disk gaskets, ring gaskets, flange gaskets (with bolt holes), exhaust gaskets, rectangular gaskets, rounded-corner rectangles, square gaskets, capsule/slot gaskets, ovals, pentagons, hexagons, octagons, and trapezoids.

Is there a minimum order quantity for custom cut gaskets?

No minimum order. We cut single custom gaskets as readily as bulk orders. Price per piece decreases automatically with quantity in the configurator.

How long does production take?

Most orders are cut and shipped within one business day. Larger orders may take longer.

What is the maximum size gasket you can cut?

The largest part is 32.5″ × 32.5″ in Neoprene, Silicone, EPDM, Buna-N, Cork, and Fiber/Compressed Gasket Paper. The configurator tells you if your part is too large for the selected material. Contact us for larger parts.

What file format do I need to submit for a custom gasket order?

No file is needed for the standard gasket shapes. Our online configurator generates the cut geometry from the dimensions you enter. A DXF file is only needed if you want a custom outline that is not one of the standard shapes: choose the Custom DXF Upload option and upload a .dxf file.

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Custom Buna-N (Nitrile) Gaskets Cut to Size — Instant Quote

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Buna-N (nitrile, NBR) is the standard rubber for oil, fuel and hydraulic service. Fastest Gaskets CNC cuts (laser, waterjet, and more) custom Buna-N gaskets to ±0.015″, up to 32.5″ × 32.5″ in every Buna-N thickness. Instant quote, no minimum, ships in one business day. Large orders may take longer.

Custom Buna-N Gasket Specifications

Temperature range	−40°F to 250°F
Durometer (hardness)	60–70 Shore A standard
Excellent resistance to	Petroleum oils, fuels, hydraulic fluids, and greases
Poor resistance to	Ozone, UV, weathering, and sunlight (not for outdoor use)
Thicknesses available	1/16", 1/8", 3/16", 1/4"

Additional specifications and specific durometers are available on request — contact us with your requirements.

Buna-N vs Neoprene vs EPDM vs Viton

Buna-N — excellent for oil, fuel and hydraulic fluid; poor ozone and UV resistance (not for outdoor use)
Neoprene — a general-purpose balance of oil and weather resistance
EPDM — outdoor, UV, ozone and water service; not for oil
Viton — high-heat and broad chemical resistance; a premium material that costs more

See the materials guide for the full comparison.

Shapes available in Buna-N

Common Buna-N Gasket Applications

Fuel-system and carburetor gaskets
Hydraulic and pneumatic seals
Automotive engine and oil-pan gaskets
Pump and compressor seals
Oil and grease reservoir covers
Industrial machinery gaskets

When to Choose Buna-N

Choose Buna-N whenever the gasket will contact oil, fuel, or hydraulic fluid — it outperforms every other standard material there. Do not use it outdoors or in sunlight, where its poor ozone resistance causes cracking; choose EPDM or Neoprene for weather exposure instead.

Buna-N Gasket FAQs

What is Buna-N gasket material?

Buna-N — also called Nitrile or NBR — is a synthetic rubber prized for excellent resistance to petroleum oils, fuels, and hydraulic fluids. It is the standard for automotive and fluid-system gaskets.

Can Buna-N be used outdoors?

No. Buna-N has poor resistance to ozone, UV, and weathering and will crack in prolonged sunlight. For outdoor sealing, choose EPDM or Neoprene.

Is Buna-N good for fuel?

Yes — Buna-N is one of the best materials for gasoline, diesel, and oil contact, which is why it is used throughout fuel and hydraulic systems.

Buna-N vs neoprene: which should I choose?

Choose Buna-N for direct oil, fuel or hydraulic-fluid contact; choose neoprene for a general-purpose balance of oil and weather resistance.

What temperature range does Buna-N handle?

−40°F to 250°F.

How accurate are your Buna-N gaskets and how big can they be?

CNC cut (laser, waterjet, and more) to ±0.015″. Up to 32.5″ × 32.5″ in every Buna-N thickness, including adhesive-backed and compressible Buna-N.

How fast do they ship?

Ships in one business day. Large orders may take longer.

Enter your dimensions in the quote tool above for an instant price on custom Buna-N gaskets from Fastest Gaskets — no minimum order, ships in one business day.

Need help before you order?

Which material should I pick?

Full comparison on our Materials Guide.

Hot parts with oil or fuel (engines, exhaust) → Viton (FKM)
Hot parts, no oil (ovens, HVAC) → Silicone
Oil or fuel (pumps, hydraulics, petroleum) → Buna-N (Nitrile) — or Viton for higher heat
Water / outdoor / sun → EPDM
General automotive or light oil → Neoprene
Chemicals / aggressive fluids → PTFE (Teflon) — or Viton for high heat plus chemicals
Soft seal / uneven surfaces / low pressure → Cork blends

Not sure which material fits? Email us at fastestgaskets@gmail.com.

We CNC cut (laser, waterjet, and more) to ±0.015″. Up to 32.5″ × 32.5″ for most materials; the quote tool shows the exact limit for the one you pick. Ships in one business day. Large orders may take longer.

How to measure

Measure the outside size — diameter for rounds, or length × width for rectangles and squares.
Measure the inside opening and any holes (ID, bolt holes, bolt circle if it is a flange).
Note the thickness you need — pick it in the quoter.
Enter sizes in inches.
Already have a drawing? Upload a DXF for an instant price.

More detail: Measuring Guide. Materials: Materials Guide.

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Custom Buna-N (Nitrile) Gaskets Cut to Size — Instant Quote