9"x 75' TYVEK FLEXWRAP NF
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DuPont™ Tyvek® FlexWrap™ NF (9" x 75')
DuPont™ Tyvek® FlexWrap™ NF (No Fasteners) is a premium, extendable self-adhered flashing membrane designed to provide a seamless air and water barrier for the most vulnerable parts of a building envelope. Unlike standard flashing tapes, FlexWrap™ NF is engineered to stretch and conform to complex shapes, making it the industry standard for sealing window sills, arched heads, and door corners.
Key Features
Superior Conformability: Its unique micro-creped Tyvek® top sheet allows the tape to be pulled and stretched around corners and curved openings without the need for mechanical fasteners or cutting.
100% Butyl Adhesive: Features a high-performance butyl layer that provides an aggressive bond to most common building materials, including OSB, plywood, gypsum, and masonry.
No Fasteners Required: The "NF" stands for No Fasteners—this tape stays in place on its own, even in flexed corners, reducing the risk of leaks caused by penetrations.
Extreme Weather Performance: Designed to perform in a wide range of temperatures; it can be installed at temperatures as low as -4°C (25°F) on clean, frost-free surfaces.
UV Protection: Built to withstand up to 270 days (9 months) of direct UV exposure during the construction phase.
Asphalt-Free: Contains no asphaltic or bitumen materials, preventing the "oozing" or staining often seen with inferior flashing products.
Technical Specifications
| Property | Specification |
|---|---|
| Dimensions | 9 inches x 75 feet |
| Material | Micro-creped Tyvek® with 100% Butyl Adhesive |
| Standard Compliance | Meets AAMA 711 (Class A, Level 3) |
| UV Resistance | 270 Days |
| Thickness | Approx. 1.6 mm |
| Temperature Range | Install down to -4°C (25°F); Service up to 80°C (176°F) |
Ideal Applications
Window Sills: Create a seamless, one-piece sill pan to prevent water intrusion.
Arched/Radius Windows: Easily wrap around curved headers without "fish-mouthing" or gapping.
Door Thresholds: Protect the critical junction between the floor and the door frame.
Wall Penetrations: Seal around HVAC vents, pipes, and electrical outlets for a tighter building envelope.
Pro Tip: For maximum adhesion on porous surfaces like concrete or masonry, use a compatible DuPont™ adhesive primer. Always apply firm pressure by hand or with a J-roller to ensure a permanent bond.