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Porex Porous Polymers



Genuine Porex® materials offer uncompromising performance for a variety of scientific, medical, electronics, and consumer applications.

Interstate Specialty Products is a Manufacturing Partner and Distributor that carries the full line of Porex® materials. These porous plastics and polymers are available with controlled pore sizes for filtered, wicking, venting, muffling, diffusing, and membrane support. Porex creates high value porous solutions that enable our customers' products to do something new, something better, or at a lower cost. 

At our custom fabrication facility in Sutton, Massachusetts, we can convert Porex sheets, rods, and tubes to your precise geometry. Our Made in the USA manufacturing company has extensive experience in Porex fabrication.

Pore Size/ Pore Volume

An intricate network of open- celled, omni directional pores that provide consistency throughout the media for a unique combination of diffusion, wicking, filtering, and venting capabilities. 


  • Porex Porous Plastic structures are all representative of Open Cell Porous Materials
  • Pore size is the average size of the voids in the Porous Media
  • Pore Volume is the percentage of the material's air volume at total volume




Porous Polyethylene

  • Pore Sizes: 7 micron- 300 micron
  • Tensile strength up to 20N/mm2
  • Resilient and resistant to creep and fatique
  • Highly resistant to move acids and alkalis
  • Resistant to most organic solvents below 176F
  • Suitable to use at temperatures from 200F up to 300F

Porous Polypropylene

  • Pore Sizes: 100 micron to 300 micron
  • Resilient and resistant to creep and fatique
  • Low elongation makes the products rigid and stiff 
  • Suitable to use at temperatures from 200F up to 300F


Porex Products

  • Porex Sheets

    • Choose between polyethylene, polypropylene, or PTFE construction
    • Range of pore sizes from 1 to 150 micron
    • Scalable and reproducible processes
    • Porex sheets are naturally hydrophobic, but many are available with a hydrophilic treatment

View Porex sheet specifications.

  • Porex Rods

    • Available in 1/8"-1/4"-1/2" diameters
    • 12" lengths
    • Range of pore sizes from 20 micron to 70 micron

View Porex rod sizes and specifications.

  • Porex Tubes

    • Rigid, lightweight Schedule 40 PVC sized porous plastic tubes are easy-to-handle and can be easily fabricated into piping systems with off-the-shelf components
    • Omni-directional porous structure
    • Available in varying outer and inner diameters
    • Available in 36” and 48” lengths
    • Range of pore sizes from 15 to 250 micron

View Porex standard tube specifications.

  • Porex Vents

    • Weather resistant, chemically inert, flame-rated, UL-listed
    • Feature IP ratings
    • Meet NEMA Standards

View Porex standard vent specifications.

  • Porex PTFE Membranes

    • Strong and robust
    • Three dimensional pore structure with good control over pore size and pore distribution with omni- directional flow and high tensile strength
    • Filtration efficiency of 0.1u (>99.999%)
    • Resistant to pore closure under pressure for consistent performance over the life of the filter
    • USP23 approved, non-cytotoxic, chemically inert, and sterilizable by steam and EtO

View Porex standard PTFE Membrane specifications.

Porex Fabrication

Interstate Specialty Products die-cuts Porex materials and also has digital die-less cutting capabilities. To learn how Porex fabrication supports your application, contact us on-line or call (800) 984-1811.

*Properties and applications shown throughout this website are typical. Your specific application should not be undertaken without independent study and evaluation for suitability.

Request a POREX  Quote