Expanded PTFE Sheet

What makes the sheet different from standard PTFE

Expanded PTFE Sheet is produced by stretching 100% pure PTFE resin in multiple directions to create a network of fine fibrils. That fibrillated structure is what gives the material its softness and multidirectional strength — it deforms under light bolt load to follow the flange surface, and it recovers when the load is released, so it does not relax and lose sealing stress the way a rigid PTFE sheet does.

Because the sheet is soft, it seals at low compressive load and can bridge the pitting, scratches and heat distortion of older flange faces without re-machining. This is the single biggest reason it is used on glass-lined, enamel, and damaged steel flanges — the sealing problem is geometry, and the expanded structure solves it.

• 100% PTFE — no fillers, no binders, no asbestos, no lung-intruding materials.
• Good sealability and flexibility — conforms to uneven flange faces and unusual geometry.
• Highly compressible — seals at low bolt load, ideal for low-pressure and glass-lined flanges.
• Uniform and highly fibrillated microstructure in multiple directions — no weak direction, no tearing when cut or handled.
• Resistant to creep and cold flow — holds sealing stress longer than a rigid PTFE gasket.
• Excellent resistance to common chemicals, pH 0–14 — inert to acids, alkalis, solvents and waste liquids.
• Meets FDA requirements — no contamination, no toxicity, suitable for food and pharmaceutical service.
• Service temperature from −450 °F to +500 °F — short-term peak up to +600 °F.
• Easy to cut and install — cuts cleanly with a knife or die, no special tooling required.
• Low compressive load to seal — reduces bolt torque requirement and flange stress.

To quote accurately, please provide the following information with your inquiry:

• Sheet thickness (common range 0.5 mm to 6 mm, thicker on request)
• Sheet size — standard or cut-to-size dimensions
• Whether the sheet is a plain roll, cut sheet or die-cut gasket to drawing
• Quantity per size and required delivery date
• Destination port and any documentation requirements (FDA statement, material certificate)