Tyvek StraightFlash VF VersaFlange 6 inch x 125 ft

DuPont™ Tyvek® StraightFlash™ VF (VersaFlange™) – 6 in x 125 ft Self-Adhered Window & Door Flashing Membrane

DuPont™ VersaFlange™ (formerly Tyvek® StraightFlash™ VF) is a construction-grade self-adhered flashing membrane engineered for integrating non-flanged and brick mold windows and doors into the building envelope. It’s designed to help protect vulnerable openings from bulk water leaks and support a more durable, better-sealed wall assembly.

In simple terms: This is a heavy-duty flashing membrane that helps seal window and door frames to the wall system—especially when the opening doesn’t have a standard flange.

VersaFlange™ uses a durable Tyvek® topsheet with a 100% butyl adhesive layer and a specially designed scored release liner to make installation faster and more forgiving. Its unique dual-sided design helps tie the window or door frame directly to the sheathing or WRB for reliable moisture protection.

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Best For

• Contractors: Brick mold and non-flanged windows/doors, plus demanding openings where reliable, repeatable flashing matters.
• Builders: Projects requiring a robust, system-compatible flashing membrane with proven standards performance.
• DIY/Homeowners: When you want a professional-grade flashing approach for tricky window/door details (especially non-flanged frames).

Key Benefits

• Designed for non-flanged & brick mold openings: Built specifically for these window/door conditions.
• Dual-sided butyl adhesive: Helps create a reliable moisture seal and strong bond when installed correctly.
• Durable Tyvek® topsheet: Tough, tear-resistant construction for jobsite handling.
• Forgiving install: Designed with a forgiving initial tack to allow repositioning and correction during install.
• No asphalt/bitumen: Avoids common issues some manufacturers warn about (staining/oozing/deformation over time, especially with vinyl components).
• UV exposure tolerance: Designed to withstand up to 270 days of UV exposure.

Typical Applications

• Flashing brick mold windows and doors
• Flashing non-flanged and non-integral flanged openings
• Integrating window/door frames to sheathing or WRB
• Sill, jamb, and head detailing (straight-run applications)
• High-risk openings where bulk water protection is critical

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How This Compares (Helps Buyers Choose)

• VersaFlange / StraightFlash VF: Best for non-flanged & brick mold windows/doors; specialty release liner & dual-sided butyl for integration to sheathing/WRB.
• Tyvek® Flashing Tape: Great for standard flange flashing and general opening details.
• Tyvek® FlexWrap™: Best for corners, curves, and tight transitions where flexibility is needed.

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Specifications

Product Type	Self-adhered window & door flashing membrane
Size	6 in x 125 ft
Adhesive	100% butyl (dual-sided design)
Construction	Durable, micro-creped Tyvek® topsheet + scored release liner
Standards	Meets AAMA 711-13 (Class A, no primer; Level 3 Thermal Exposure)
UV Exposure	Designed to withstand up to 270 days

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Installation Notes (Best Practice)

• Surface prep matters: Install on clean, dry surfaces free of frost, dirt, oils, and debris.
• Press/roll firmly: Use firm pressure (roller preferred) to ensure full adhesive contact.
• Sequence correctly: Flash in a way that promotes outward drainage (commonly sill → jambs → head).
• Cold-weather installs: Product guidance indicates installation can be done at low external temperatures when surfaces are clean and frost-free; use primers only when required by conditions/substrates.

Why It Matters

Window and door openings are among the most common sources of leaks in the building envelope. Using a purpose-built, self-adhered flashing membrane helps protect framing, sheathing, and insulation from bulk water intrusion and supports long-term wall durability—especially around non-flanged and brick mold openings.

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Common Questions

Q: Is this the same as Tyvek® StraightFlash™ VF?
A: Yes. DuPont states StraightFlash™ VF has been rebranded to VersaFlange™ and can be used anywhere StraightFlash™ VF is specified.

Q: Should I use this for corners?
A: For inside/outside corners or curved transitions, a flexible flashing like Tyvek® FlexWrap™ is usually the better choice.

Q: What openings is this designed for?
A: It’s specifically designed for non-flanged and brick mold windows and doors, helping tie the frame to the sheathing/WRB to protect against bulk water leaks.