You are using an outdated browser version not supported by this website.
Click here to upgrade your browser

DuPont FlexWrap NF
Description

DuPont FlexWrap NF is a one piece, flexible flashing tape, with an 100% butyl self adhesive.

DuPont FlexWrap NF is designed to be used:

  • To seal around windows, doors, and other wall penetrations such as plumbing pipes and dryer vents as a secondary defence against water penetration
  • It is compatible with timber and steel framed buildings
  • It is compatible with most construction materials including concrete, wood, steel and synthetic wall underlays
  • A primer or contact adhesive can be used In some difficult to adhere building materials applications. Contact DuPont for compatibility details
  • For a risk score between 0-20 in accordance with NZBC Acceptable solution E2/AS1
  • Building Wind Zones up to and including Very High NZS3604:1999, Extra High if used over Rigid Air Barrier

DuPont FlexWrap NF is available in roll size: 152.4mm x 22.9m, 228.6mm x 22.9m.

Key Features
  • CodeMark Product Certification (CMA-CM40141) as prescribed New Zealand Building Code
  • Covered by a DuPont product warranty
  • 100% butyl adhesive meaning it will adhere in low temperatures down to –4°C, in addition to sticking to most building materials without the need of adhesive primer
  • Up to 120 days UV resistance to allow plenty of time for cladding to be installed
  • Moulds seamlessly around corners meaning no additional plastic corner pieces are required
  • Flexibility meaning it can be used to seal the head of curved windows in one piece of seamless material
  • Can be re-positioned once applied to building material
  • Contains no bitumen or asphalt
  • Compatible with most adhesives and sealants — contact DuPont for specific product compatibilities
Homestar / Green Star (Envirospec) Compliant
Homestar / Green Star
Red List Material Free
Red List Material Free
Scope of Use
  • For a risk score between 0-20 in accordance with NZBC Acceptable solution E2/AS1
  • Building Wind Zones up to and including Very High NZS3604:1999, Extra High if used over Rigid Air Barrier
  • To seal around windows, doors and other wall penetrations as a secondary defence against water penetration
  • It is compatible with timber and steel framed buildings
  • It is compatible with most construction materials including concrete, wood, steel and synthetic wall underlays
  • Can be used in Rigid Air Barrier applications on ply and fibrecement substrates
Limitations on Use

To meet the provisions of NZBC as outlined in this data sheet, DuPont FlexWrap NF must be:

  • Considered as part of the wall cladding system and not in isolation
  • Used in conjunction with air seals and joinery flashing systems, not as a substitute
  • Used behind claddings that will remain weather resistant

DuPont FlexWrap NF should not be:

  • Installed in temperatures above –4°C (without the use of an adhesive primer)
  • Exposed to UV for greater than 120 days
  • Exposed to a naked flame in order to warm the product
  • Used to compensate for poor workmanship of the window or door installation

DuPont FlexWrap NF is suitable for use with LOSP treated timber, upon condition the solvent in LOSP treated timber having had sufficient time to evaporate.

NZS 3604 Wind Zone Extra High suitable
Extra High Wind Zone
NZS 3604 Wind Zone Very High suitable
Very High Wind Zone
Statement of Building Code Compliance

DuPont FlexWrap NF when installed in accordance with the recommended guidelines will meet or contribute to meet the following provisions of NZBC:

  • NZBC Clause B2: Durability. Meets the requirement of NZBC B2.3.1 a) 50 years b) 15 years
  • NZBC Clause E2: External Moisture. Contributes to meet these requirements
  • NZBC Clause F2: Hazardous Building Materials. Meets this requirement and will not present a health hazard to people

DuPont FlexWrap NF meet the requirements of Acceptable Solution to NZBC E2, and has a CodeMark Product Certification.

In-Service History
  • 20 years in North America
  • 15 years in North America and Europe
  • 10 years in New Zealand
Other Performance Attributes
  • ASTM E331: No leakage at 25 and 75PA
  • AAMA 711-13: Meets the Material Classification Standard at the Highest Level: Class A (No Primers)
  • Level 3 Thermal Exposure (80°C for 7 days)
B2 Durability compliant
Durability
E2 External Moisture compliant
External Moisture
F2 Hazardous Building Materials compliant
Hazardous Building Materials
CodeMark
CodeMark
Documents
Data Sheet and Installation Instructions
CodeMark Certificate
Environmental Information (EPD)
Building Bulletin
DuPont Tyvek Product Portfolio
Tyvek Product Guide

Tyvek building envelope solutions help make buildings more durable, comfortable, and energy efficient, and are now distributed by Pink Batts insulation in New Zealand.

Product Enquiries

News from Tyvek

Vapour Permeable Wall Underlay Keeps Interiors Dry
DuPont Tyvek Underlay Suited for Skillion Roofs
Tyvek Metal Used for Drainage and Ventilation
Get a free weekly digest of essential news

New and updated architectural products, design solutions, inspiration, technical advice and more when you sign up for EBOSS.