Why should you choose an Expanded PTFE instead of PTFE?

Why should you choose an Expanded PTFE instead of PTFE?


PTFE stands for Polytetrafluoroethylene. It is a synthetic fluoropolymer of tetrafluoroethylene.  Expanded PTFE is made of 100% pure PTFE which can be used as a sealing agent. It is lightweight but strong. These materials are used for various industrial applications but you should know whether PTFE or ePTFE is better for your application. To get the answer to this crucial question you must know the difference between and usages of these two materials.

The Difference between PTFE and Expanded PTFE


  • PTFE or Teflon is a solid material.
  • It can function well in an environment with up to 260 Degree Celsius temperature.
  • It is a long-lasting material as it can put up with corrosion. 
  • It does not cause much friction.
  • The industries fit for the usage of PTFE are oxidizing media, mineral oils, pharmaceutical, food, petrochemicals, glass line reactors and columns, solvents, lacquers, and corrosive chemicals.
  • It does not contaminate anything that comes in close proximity to it as it is non-corrosive which is why food industries use it.
  • It has no smell of its own.


  • 100%virgin PTFE is the material used to produce expanded PTFE. 
  • ePTFE as a sealing material can be highly compressed.
  • It can stand strong against creep and cold flow.
  • It can adapt to sealing surfaces easily.
  • It can be modified as per requirements such as surface energies, stiffness, hardness, etc.
  • It is microporous and so fit for any task that needs airflow.
  • It stretches at a high temperature and is smooth in texture.
  • It is chemically inactive, water-resistant at low pressure, UV resistant and has a low dielectric constant, radial extension, divergent porosity level.
  • It can be used in medical and biological industries, high-performance filters, medical devices, oil and gas industries, electronic insulators, hernia repair, vascular grafts, and other reconstructive surgery, fluidic purification applications, and environmental filtration.

Why Should You Go for an ePTFE over a PTFE?

Both PTFE and ePTFE have superb industrial applications with excellent features. But the range of application of ePTFE is wider than PTFE. The multi-directional fibrous structure of ePTFE makes it capable of performing at a high surface pressure condition. For maximum safety demands like flange sealing of oxygen-carrying tubes, ePTFE is the appropriate material as it can be highly customized. ePTFE has a better performance rate than PTFE. It has so much demand in the market that it is now manufactured with varying heights, densities, and dimensions. 


Are you looking for ePTFE and PTFE sheets suitable for your needs? We are just one step away. We, at Sealmax, produce high-quality and reliable ePTFE and PTFE sheets. Contact our experts now at +91 8983059377 or visit our website www.sealmax.in

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