Heat Sealing

American Durafilm designs and manufactures to order any size bag in our manufacturing facility located in Holliston, Massachusetts for any quantity small or large.  Custom fittings can be installed and rigid Teflon® tubing can be heat sealed into bags allowing gases and liquids to flow in and out. We specialize in heat sealing a variety of high performance materials including Kapton®, Teflon® FEP, Teflon® PFA, and Tefzel®, and TCGF belting.


All heat seals are made on state of the art thermal impulse heat sealing equipment, insuring maximum seal strength. With custom designs and configurations available including straight from .125” to  1.6” wide as well as radius or contiguous circle seals we invite you to challenge us with your design. With our state of the art design and prototyping equipment we can offer cost effective processes to meet your heat sealing needs.

  • Withstands high temp applications up to 500°F (260°C)
  • Suitable for cryogenic use -400°F(-240°C)
  • Autoclave resistance
  • Visually clear and provides a high transmittance of UV light
  • Virtually indestructible to impact and tearing
  • No electrical tracking, non-wetting, and non-charring
  • Anti-stick and low frictional properties
  • Easily cleaned and reused
  • Inert for non-contaminating samples
  • Low permeability to liquids, gases, moisture and organic vapors
  • Weather resistant
  • Chemically inert and solvent resistant to virtually all chemicals (except molten alkali metals, gaseous fluorine, complex halogenated compounds at elevated pressure and temperature)
  • Bags for cryogenic storage of tissue and cell cultures
  • Sampling bags for gases and liquids
  • Tank, drum and pail liners
  • Protective hoods and gloves
  • Large panels and blankets
  • Chemical storage bags

Standard Heat Sealed Products

Click here to view our Chemours Technical Specifications
TEFLON® is a registered trademark of Chemours


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For preset sizes and qtys, visit our online shopping site Durafilm Shop.