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