Custom Fiber Gaskets — High-Pressure Flange Seals
Custom Fiber Gaskets — High-Pressure Flange Seals
Compressed fiber (non-asbestos) is the high-temperature, high-pressure workhorse for rigid flange and exhaust sealing. Where elastomers soften or burn, fiber holds a tight seal against heat, steam, and bolt load. We CNC cut (laser, waterjet, and more) custom fiber gaskets to your exact dimensions with no minimum order and ship within one business day.
Custom Fiber Gasket Specifications
| Temperature range | Up to 500°F+ (higher than standard elastomers) |
| Construction | Compressed non-asbestos fiber — rigid, not elastic |
| Excellent resistance to | High heat, high bolt pressure, steam, oils, and many chemicals |
| Poor resistance to | Applications needing elasticity or low-torque conformity |
| Thicknesses available | 1/16", 1/8", 3/16", 1/4" |
Additional specifications and specific durometers are available on request — contact us with your requirements.
Common Fiber Gasket Applications
- Exhaust and header flange gaskets
- High-pressure pipe and flange seals
- Steam and boiler equipment
- Industrial pump and valve gaskets
- Compressor and manifold seals
- Chemical process flanges
When to Choose Fiber
Choose Fiber for high-temperature and high-pressure flange service where rubber would soften, burn, or blow out. For low-clamp-load or flexible sealing, choose Cork or an elastomer such as EPDM or Neoprene instead.
Fiber Gasket FAQs
What is compressed fiber gasket material?
Compressed non-asbestos fiber is a rigid gasket material that withstands high temperatures and bolt pressures, used for exhaust, steam, and high-pressure flange sealing.
How much heat can fiber gaskets take?
Compressed fiber handles 500°F and beyond — well above standard elastomers — making it the choice for exhaust and boiler flanges.
Is fiber gasket material flexible?
No. Fiber is rigid, not elastic. For applications that need a soft, conforming seal at low bolt load, choose Cork or a rubber elastomer.
Enter your dimensions in the quote tool above for an instant price on custom Fiber gaskets from Fastest Gaskets — no minimum order, ships in one business day.
Related materials: neoprene gaskets, Buna-N gaskets, Viton gaskets.
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.