DuPont™ Weathermate™ Flexible Flashing

Commercial | Residential | Multifamily | Wall

An asphalt-free solution that bonds to most building materials

Based on a unique rubber adhesive technology, Weathermate™ Flexible Flashing provides a tear-resistant seal against the weather for windows, doors, and other penetrations.


DuPont™ Weathermate™ Flexible Flashing

Weathermate™ Flexible Flashing is a self-adhering, fully adhered flashing that conforms to curved surfaces to provide a tear-resistant seal that combats water intrusion around windows, doors and other penetrations. It combines a whitecreped, high-density polyethylene (HDPE) film facer with a butyl rubber adhesive that forms a strong mechanical and chemical bond to most building materials. A polymeric-coated kraft paper release liner provides a more consistent peel than plain paper liners.  


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)
    UV Resistance - Days 120

    Available sizes


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