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Your cart is empty.DuPont FlexWrap NF is a premium performance, extendable self adhered flashing material that can be applied over a wide range of building substrates, including non nailable sheathing materials like PSfoam board, fiberboard, concrete masonry unit (CMU), and other such materials. DuPont FlexWrap NF self adhered flashing does not require mechanical fasteners, even in flexed corner areas around building openings. This allows it to provide easy, one-step insulation for hard-to-seal corners around windows and doors. FlexWrap NF is designed to help protect vulnerable corners against air and water intrusion, as part of a complete DuPont Building Envelope Solution. It’s effective across a range of window and door designs and a wide range of typical wall substrates. FlexWrap NF integrates easily with all DuPont air and water barriers, to help seal the building envelope for improved durability and energy efficiency. Correctly installed, FlexWrap NF can help stop water from getting at the corners of windows and doors. In turn, that can help prevent water damage, such as wood rot and corrosion,as well as mold. Keeping air and water out can also help maintain insulation R-value, for improved energy efficiency. DuPont FlexWrap NF means “no fasteners.” Instead, DuPont FlexWrap NF is a self adhered, extendable flashing backed with a 100 percent butyl based adhesive layer, making one-step installation and protection possible. And because it’s an extendible flashing material, DuPont FlexWrap NF can be stretched and wrapped into a rough window opening before the window is installed, or flashed around arched or custom-shaped windows, as well as other wall penetrations. So FlexWrap NF isn’t just an effective flashing to seal out water, it’s also a cost- and time effective material for crews to work with on the job site.
Handyman by hobby
2025-07-28 13:08:36
Pricey but a lot less than the local lumber yards charge which is about twice the price.
Reader
2025-07-18 11:10:06
Using for window installs. Great product.
Robert
2025-07-10 12:59:53
Installing new windows. This product is featured in many of the online home construction instructional videos and websites. There is a slight learning curve in applying this product, but with a little patience it's easy. Strongly adheres to underlying material such as studs and house wrap. Appears to form a tight seal around the sill.
Kevin Stormer
2025-06-18 16:29:57
This wad exactly what we were looking for without having to drive 100 miles round trip.The price was the same as the big box store.
M. Wallisky
2025-06-01 18:49:26
Bought this with the impression that I was buying the absolute best product money could buy for my home. Expect the DuPont name to be best of the best. Used it in conjunction with DuPont Flashing Tape (which I liked) and DuPont home wrap (which I also like). I guess I saved some time by not having to cut separate pieces to form the bottom section for my new construction window install but found the product hard to work with and the adhesive release to be difficult. Can't say I would buy this again as a home owner. It is expensive and I guess I just expected more. Note that I am not a contractor.
Chief
2025-04-14 13:52:27
I used this product around my window openings and it worked excellent to make the corner transition in a single piece. Caution needs to be used when installing to not have the wrap touch itself as it will be impossible to separate it and the piece is then trash.
Jeremy Blanford
2024-12-24 18:14:13
Installing windows and used this tape to be able to stretch around the corners on the bottom. It works well for its purpose. The tape is pretty spendy for just stretchy tape. On the other hand, being quoted $200 a window to install. Tape is the cheaper option. All in all, it works well and would buy again.
Garth Smith
2024-11-18 12:02:04
Excellent product. Used for DYI window installation project in Colorado. Installed 7 windows in the dead of winter with no adhesion issues whatsoever. Flex capability was excellent no plastic corner pieces necessary for waterproofing rough in.
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