DuPont™ StraightFlash™
Protection for Straight Jambs and Heads of Windows and Doors
DuPont™ StraightFlash™
Protection for Straight Jambs and Heads of Windows and Doors
<br /><b>DuPont™ StraightFlash™</b> is an innovative, single-sided, self-adhered flashing solution that bridges the gap between the rough opening and building envelope to protect against water intrusion around heads and jambs of rectangular doors, windows and other gaps. By sealing vulnerable areas around openings, <b>DuPont™ StraightFlash™</b> can help improve the durability and energy efficiency of both homes and commercial structures. <br /><br /> <b>DuPont™ StraightFlash™ flashing</b> combines a DuPont™ Tyvek® topsheet with a 100% butyl-based adhesive layer, merging the strength, durability and water resistance of Tyvek® material with the convenience and flexibility of a self-adhered flashing. The result: premium door and window flashing protection that helps keeps rain out and integrates seamlessly with other DuPont™ air and water barriers in a complete building envelope system.
Resources
Product Information Sheets Installation Guides Technical Documents Brochure Warranty Case Study Videos
Features & Benefits
Application and Service Temperature
- Withstands up to 9 months (270 days) of UV exposure.
- Can be installed at external temperatures as low as 25 °F (-4 °C) if the surface is clean and free from frost and ice.
High Performance Durability
- Helps prevents water intrusion by stopping potential water damage – from rot and corrosion to mold – before it starts, resulting in a more durable wall assembly.
- Preserves the installed R-Value of insulation, making buildings more energy efficient by helping to prevent air and water leakage.
- Constructed with a tear-resistant, micro-creped DuPont™ Tyvek® top-sheet and specially designed, quick-release, scored release liner.
- 100% butyl sealant provides excellent adhesion to most common building materials.
- Forgiving initial tack provides ability to correct installation mistakes.
- Does not contain asphaltic / bitumen adhesive materials which many window manufacturers prohibit due to adverse material reactions.
- Meets AAMA 711, Voluntary Specification for Self-Adhered Flashing Used for Installation of Exterior Wall Fenestration Products.
Specifications
Standard Sizes
Testing
<b>DuPont™ StraightFlash™</b> exhibits physical properties as indicated in the table below when tested as represented. Review all instructions and (Material) Safety Data Sheet ((M)SDS) before use. Please contact DuPont at 1-833-338-7668 when additional guidance is required for writing specifications that include this product.
(0.2 L/s • m2)
(< 60 ng/Pa.sec.m2)
Level 3 Thermal Exposure
(80°C/176°F for 7 days)
Note:- *Tested in a wall assembly containing a window. Consult DuPont for primer recommendations
FAQ
Can DuPont™ StraightFlash™ be used in lieu of DuPont™ Flashing Tape? Yes, StraightFlash™ can be used everywhere DuPont™ Flashing Tape specified in installation literature and/or CAD details, but DuPont™ Flashing Tape cannot replace StraightFlash™ in all applications. Please refer to the applicable DuPont Installation Guideline for more information. Are there any special considerations when DuPont™ StraightFlash™ is used on the same wall where DuPont™ Tyvek® Fluid Applied WB+™ is to be sprayed? DuPont™ StraightFlash™ has clean edges and when used for window and/or corner treatment, the edges may need additional attention when DuPont™ Tyvek® Fluid Applied WB+™ is spray applied.When spraying, the outer edges (clean edges) should be pretreated with DuPont™ Tyvek® Fluid Applied Flashing and Joint Compound+ and tapered to the wall substrate for smooth transitions free of pinholes and voids. Refer to the DuPont™ Tyvek® Fluid Applied WB+ and DuPont Flashing Products Installation Guidelines for additional information. Why does DuPont require DuPont™ StraightFlash™ installation along the sill of the rough opening if the installing professional intends to use the Flashing and Joint Compound+ to protect the rough opening for a non-flanged or storefront window? The application of StraightFlash™ along the primed sill of the rough opening prior to the installation of the Tyvek® Fluid Applied Flashing and Joint Compound+ is to provide additional water infiltration resistance and protection when self-tapping screws are utilized to secure large non-flanged and storefront windows.
Additional Learning
Learn how choosing the right building envelope system can dramatically improve a home’s durability, moisture protection, and energy efficiency. Discover how DuPont™ Tyvek® water-resistive barriers and integrated building envelope solutions deliver proven, science‑driven performance that stands up to real‑world conditions.
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Learn the essential steps for installing DuPont™ Tyvek® as part of a high‑performance building envelope system. Our installation guides will show how proper installation helps maximize air and water protection for long‑lasting home durability.
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Vapor permeability plays a critical role in protecting walls from trapped moisture, mold and rot. Learn how DuPont™ Tyvek® water-resistive barriers provide the ideal balance of air and water resistance with high breathability to help walls dry effectively.
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The DuPont Building Envelope Specialist Network delivers hands‑on technical support, training and guidance to help teams build durable, energy‑efficient structures. Discover how DuPont pairs advanced product performance with unmatched field expertise to support your project every step of the way.
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DuPont offers a full range of product and system warranties designed to protect builders and property owners with reliable, long‑term coverage. Explore how DuPont™ Tyvek® warranties, along with expert project support, help ensure durable, high‑performing building envelope systems.
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Energy‑efficient construction starts with science‑driven water-resistive barriers that protect walls and improve long‑term performance. See how DuPont™ Tyvek® and the full DuPont Building Envelope system work together to reduce energy loss, manage moisture and support sustainable building design.
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Learn how DuPont is advancing sustainable construction with building envelope systems designed to improve energy efficiency, indoor environmental quality, and long‑term durability. Discover how DuPont™ Tyvek® water-resistive barriers help reduce air leakage, protect insulation performance, and support greener, longer‑lasting buildings.
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Builders can earn National Green Building Standard™ (NGBS) certification points by using DuPont™ Tyvek® and other DuPont sustainable building products approved by Home Innovation Research Labs. Learn how these high‑performance materials support greener construction while enhancing energy efficiency and moisture protection.
