Moistop PF®

Durable nail on flashing

Moistop® PF

Moistop PF® is the solution of choice when building requirements call for a mechanically-attached flashing product that is unaffected by substrates or job site conditions. Manufactured from a multi-layer composite employing heavy-duty polypropylene woven fabric, and coated on both sides with ultraviolet-resistant polypropylene, the product resists cracking and curling – both before and after installation.

Moistop PF’s unique construction makes it ideal for installation over OSB or plywood, making it easy to integrate with a weather-resistive barrier. It can be used on all types of windows, including wood, vinyl and aluminum casing – as well as doors. The product is available in pre-cut widths of 6, 9, 12 and 18 inches, and installs easily with a utility knife and hammer.

Part of the Fortifiber® 1-2-3 moisture control system, Moistop PF is designed to withstand the rigors of the jobsite and the elements, and is backed by an industry-leading 15-year warranty.


  • Superior water protection
  • Extraordinary durability & tear resistance
  • Resists jobsite abuse
  • Mold resistant
  • Part of a complete moisture control system


  • 6" x 300'
  • 9" x 300'
  • 12" x 300'
  • 18" x 300'

Related products to qualify for the 15 year warranty


  • Data Sheets

    Moistop PF® Data Sheet Click to download  

    Mechanical Flashing Data Sheet Package Click to download  

    Architectural Specification Sheet Click to download  

    Moistop PF® Safety Data Sheet Click to download  

    ForeSight Green Building Information Click to download  

  • Install Guides

    High Performance System Click to download

    Arched Window Flashing Click to download

    Wood Window Sill Pan Flashing Click to download

    Flat Wall Window Flashing Drainage Method Click to download

    Flashing Installation Guide Package Click to download

    MAWRB-6B Flanged Window Sequence Installation Method B Click to download Click to download

  • Warranties

    15 Year Warranty Click to download

    Standard Warranty Click to download

  • CAD Drawings

    Arched Window cad

    High Performance Flashing cad

    Wood Window and Door Flashing cad

  • Videos