Tyvek FlexWrap NF 9 inch x 75 ft

DuPont™ Tyvek® FlexWrap™ NF Flashing – 9 in x 75 ft

DuPont™ Tyvek® FlexWrap™ NF is a premium, self-adhered, extendable flashing membrane designed to deliver reliable air and water sealing around windows, doors, and wall penetrations. Unlike rigid flashing tapes that require multiple cuts and patches at corners, FlexWrap™ NF stretches and conforms to complex shapes for a more continuous, jobsite-ready seal—especially at sills, corners, and curved/arched openings.

Built with a durable micro-creped Tyvek® top sheet and a high-performance 100% butyl adhesive, FlexWrap™ NF bonds to common construction substrates and integrates cleanly with weather-resistive barriers (WRBs) to help improve envelope performance and long-term durability.

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Key Benefits

• Extendable & conformable: Forms a tight seal around corners, curves, and irregular openings.
• Seamless corner protection: Reduces the need for cutting and layering multiple pieces of flashing.
• 100% butyl adhesion: Strong bond without asphalt/bitumen—minimizes staining and messy ooze.
• Durable Tyvek® facer: Tough top sheet designed for demanding jobsite handling.
• Air & water barrier support: Helps limit drafts and water intrusion at vulnerable transitions.
• Cold-weather capable: Can be installed in low temperatures when surfaces are clean and frost-free.
• UV exposure tolerance: Designed to handle extended exposure during construction schedules.

Where It’s Used

• Window and door sills
• Inside and outside corners
• Arched or radius openings
• Pipe and utility penetrations
• Transitions that require flexible, stretchable flashing

Construction & Materials

• Top layer: Micro-creped DuPont™ Tyvek® sheet (flexible and durable)
• Adhesive: 100% butyl (high-performance bond, non-asphaltic)
• Liner: Split-release liner for easier positioning and installation control

Performance Highlights

• Designed to help create a more continuous seal in areas prone to leaks (sills, corners, penetrations).
• Adheres to many common building materials including wood, metal, and typical sheathing surfaces.
• Commonly used as part of an integrated weather barrier system with WRBs and compatible sealants.

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Specifications

Product Type	Self-adhered, extendable butyl flashing membrane
Brand	DuPont™ / Tyvek®
Size	9 in x 75 ft (Roll)
Primary Use	Flashing for windows, doors, and penetrations
Adhesive Type	100% Butyl (Non-asphaltic)
Application Notes	Install to clean, dry, properly prepared surfaces. Press firmly for full adhesion.
Recommended Areas	Sills, corners, curved openings, penetrations, transitions
Use Case	Residential and commercial construction

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Installation Tips (Best Practice)

• Ensure the substrate is clean, dry, and free of dust, oils, and frost.
• Use the split liner to position the flashing accurately before full adhesion.
• Roll/press firmly to activate the butyl adhesive and improve long-term bond strength.
• Overlap seams and integrate with WRB properly to maintain a shingled water-shedding path.

Ideal For Pros Who Want Fewer Failure Points

FlexWrap™ NF is chosen by installers who want an easier, cleaner flashing solution for areas that typically require extra detailing. Its stretch-and-seal design helps reduce cut lines, overlaps, and corner weak spots— improving consistency and protecting the building envelope.