Polyken® 347
Premium Foil Tape – Heavy Duty

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Aluminum foil for sealing and masking of aircraft. Aircraft sealing and masking applications. Used as a window mask to protect aircraft canopies, windshields and passenger window surfaces from crazing and/or hazing during paint stripping operations. Heavy duty vapor barrier sealing for sheet metal, flexible, and fiberglass duct systems.


  • Aluminum Foil Backing provides a vapor barrier from moisture, contamination or corrosion.
  • Acts as a heat shield, minimizing heat transfer.
  • Superior conformability to adhere to irregular surfaces.
  • Acrylic Adhesive System developed for solvent resistance and clean removal from surfaces.
  • High adhesion – adheres tightly without lifting.
  • Excellent aging resistance with long-term bond performance.

Value Test Method
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Adhesive Proprietary Acrylic
Backing Aluminum Foil
Liner Kraft Paper
Adhesion to backing 22 oz/in / 24.5 g/mm (PSTC-1)
Adhesion to steel (PSTC-1) 50 oz/in / 55.8 g/mm (PSTC-1)
Elongation 8%
Foil Thickness 5.5 mils / .1397 mm (ASTM D-1000)
Maximum Temperature 200°F / 93°C (ASTM D-1000)
Tensile 26 lb/in / 0.46 kg/mm (ASTM D-1000)
Thickness 3 mils / 0.762mm (ASTM D-1000)
Specifications FAR 25.853 (a)


Note: The above are typical values and should not be used in writing specifications