By adding the PORON Dura-Shape option, PORON materials are enforced with a tough polyester film securely bonded between two layers of foam. This option is available to all PORON® 4701 foams, as well as the PORON® 4790-92 foam. PORON Dura-Shape technology increases the polyurethane’s dimensional stability while maintaining the compressibility characteristics of the original material, providing engineers stability for their gasket design needs.


  • Increased dimensional stability
  • Tougher tear strength
  • Functional performance across a wide range of temperatures
  • Durable and resilient under pressure


  • Reliable, long-term shape retention
  • Absorbs shock and vibration energy
  • Resistant to chemicals



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