EPT-Sealer 686T

General description

EPT-Sealer 686T is a semi-closed cell EPDM foam with excellent sealing properties. The semiclosed cell structure combines the flexibility of open cell types with the excellent sealing capabilities of closed cell types (after compression). This unique foam can be laminated with Nitto’s advanced adhesive technology to seal (complex) gaps against water, wind, dust, noise and heat.


  • semi-closed cell structure
  • super soft / conformable
  • low compression load
  • ozone resistance
  • good weatherability
  • fungus free
  • excellent ageing performance
  • good water sealing
  • excellent sound insulation
  • wide range of performing tapes


EPT-Sealer 686T
  1. Semi-closed cell EPDM foam
  2. Acrylic-based adhesive
  3. release liner


Foam thickness3 - 28 mm
Tensile strength125 kPa
Density130 kg/m³
Compression load(50%) 6.9 kPa
Waterabsorption (50%)1,90%
Watertightness (75%)No leakage


EPT-Sealer 686T is especially designed to seal (complex) gaps against water, wind, dust, noise and heat. Depending on the applications, the foam needs to be compressed between 50-80% to activate its sealing properties. AUTOMOTIVE – sealing of HVAC unit, dashboard, air duct, glass run, fire wall BUILDING & CONSTRUCTION – sealing of exterior panel joints, solar panels INDUSTRIAL – sealing of air-conditioners, mobile phones, refrigerators.

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