DuPont™ Weathermate™ Straight Flashing

Commercial | Residential | Multifamily | Wall

Create a solid seal between foundation and framing

Designed to use on building substrates such as wood, sheathing, housewrap, and concrete, Weathermate™ Straight Flashing is a flexible, asphalt-free material that’s part of a water-resistive barrier system.



DuPont™ Weathermate™ Straight Flashing

Weathermate™ Straight Flashing is a self-adhering flexible flashing used as part of a water-resistive barrier system on typical building substrates like wood, insulating sheathing, housewrap, and concrete. Weathermate™ Straight Flashing combines a blue high-density polyethylene (HDPE) film facer with a butyl rubber adhesive that forms a strong mechanical and chemical bond to most building materials, with a polymeric-coated paper release liner that helps provide a more consistent peel than plain paper liners. Weathermate™ Straight Flashing prevents water from entering the wall at windows, doors and other penetrations and creates a seal between the foundation and framing.


Features & benefits

Feature Benefit
Easy to Use
  • Excellent tack with enhanced grip
  • Easy to handle and install

    Physical properties

    Method Unit Value
    Water Vapor Transmission ASTM E96 perm <1
    Application Temperature - °F (°C) min. 40°F (4.4°C) to 180°F (82°C)
    UV Resistance - Days 180

    Available sizes


    Width (in)
    Weathermate™ Straight Flashing 100’ (30.5 m) 4, 6, 9, 18