DuPont™ Thru-Wall Flashing


Intelligent water management is critical to helping protect wall assemblies and foundations from water and moisture build-up, which can lead to mold, mildew and premature deterioration. DuPont™ Thru-Wall Flashing delivers superior drainage control around foundations and other critical transition areas so water moves efficiently to the outside of the building, helping prevent water accumulation or intrusion into wall assemblies— and helping you protect your reputation.

DuPont™ Thru-Wall Flashing, made with DuPont™ Elvaloy® and premium butyl adhesive backing, is an integral part of DuPont™ Tyvek® Weather Barrier Systems. It offers a diverse number of benefits at foundations, relieving angles and building transitions, including:

Superior protection

  • Helps protect the building enclosure as part of the DuPont™ Tyvek® Weather Barrier Systems
  • Channels water effectively outside the building
Easy installation
  • Offers excellent flexibility and strong adhesion
  • Compatible with most common construction sealants
  • UV stability reduces required components, eliminating the need for drip edge and termination bar
Superior durability
  • Low-temperature flexibility enables installation across a broad range of temperatures and environments
  • Excellent tear strength for rugged commercial conditions
Enhanced performance
  • Made with DuPont™ Elvaloy,® which provides added durability
  • Premium butyl adhesive contains no harmful polycyclic aromatic hydrocarbons (PAHs)
  • Corner and end dam accessories available for superior protection

Easy-to-install protection

A complete system that includes a self-adhesive, flexible membrane with corner and end dam accessories, DuPont™ Thru-Wall Flashing allows moisture to travel across gaps, spaces and interruptions in the drainage plane such as the bases of walls, floor lines, wall openings and copings.
Available in multiple widths and with several corner and end dam sizes, DuPont™ Thru-Wall Flashing is able to meet the varying demands of all commercial construction projects. For best results, primer must be applied.
Roll sizes: 12" x 75' 18" x 75' 24" x 75' 36" x 75'
End dam sizes: 90° inside 90° outside
Corner sizes: 4" 6"



Compatible with common sealants and primers

While DuPont™ Thru-Wall Flashing provides excellent adhesion, additional sealant is required at all laps, membrane to membrane, or membrane to pre-formed shape connections. DuPont™ Thru-Wall Flashing is specially designed to work with both silicone and urethane sealants across a wide range of temperatures for easy application even in challenging climates.

For a complete listing of compatible sealants and primers see the DuPont™ Thru-Wall Installation Guidelines.


10-Year Limited Warranty

DuPont™ Thru-Wall Flashing offers a 10-Year Limited Warranty for product replacement, giving you the assurance that DuPont will stand behind its products. Click for more details on our 10-Year Limited Warranty.

For additional information contact your local DuPont™ Tyvek® Specialist or call 1-800-44-TYVEK.