Installation Guide
For more information about DuPont Weatherization 
Systems, please call 1-800-44-Tyvek or visit us at 
www.Weatherization.Tyvek.com
Copyright © 2012 E. I. du Pont de Nemours and Company. All rights reserved. The DuPont Oval Logo, DuPont™, The miracles of science™ , Tyvek®, Tyvek® HomeWrap®, Tyvek® StuccoWrap®, Tyvek® DrainWrap™, Tyvek® CommercialWrap®, DuPont™ ThermaWrap™ , DuPont™ FlexWrap™, and 
DuPont™ StraightFlash™ are registered trademarks or trademarks of DuPont or its affiliates. K-16282 2/12
Technical Specifications
DuPont
™
 Tyvek
®
WRBsusedinconstructionproductsaremadefrom100%ashspunbondedhigh
density polyethylene fibers which have been bonded together by heat and pressure, without 
binders or fillers, into a tough, durable sheet structure. Additives have been incorporated into the 
polyethylene to provide ultraviolet light resistance. DuPont requires that DuPont
™
 Tyvek
®
CommercialWrap
®
 and CommercialWrap
®
 D WRB’s be covered within 9 months (270 days) of 
installation and that all other DuPont WRB’s be covered within 4 months (120 days) of installation.
DuPont
™
 Flashing Systems products are made from a synthetic rubber adhesive and a laminate of 
polyethylene film, polypropelene film, elastic fiber, synthetic rubber adhesive, polyurethane 
adhesive,andatopsheetofashspunbondedhighdensitypolyethylenebersorpolypropelene
film. Additives have been incorporated into these materials to provide ultraviolet light resistance. 
DuPont requires that DuPont
™
 Flashing Systems products be covered within four months (120 days) 
of installation.
Warning
DuPont
™
 Tyvek
®
 air and water barriers are slippery and should not be used in any application 
where it will be walked on. In addition, because they are slippery, DuPont recommends using 
kickjacks or scaffolding for exterior work above the first floor. If ladders must be used, extra 
caution must be taken to use them safely by following the requirements set forth in ANSI 
Standards 14.1, 14.2 and 14.5 for ladders made of wood, aluminum, and fiberglass, 
respectively. DuPont
™
 Tyvek
®
 products are combustible and should be protected from a flame 
and other high heat sources. DuPont
™
 Tyvek
®
 products will melt at 275°F (135°C); if the 
temperature of DuPont
™
 Tyvek
®
 products reaches 750°F (400°C), it will burn and the fire may 
spread and fall away from the point of ignition. For more information, call 1-800-44-Tyvek.
DuPont
™
 Flashing Systems products and their release paper are slippery and should not be 
walked on. Remove release paper from work area immediately. DuPont
™
 Flashing Systems 
products will melt at temperatures greater than 250°F (121°C). DuPont
™
 Flashing Systems 
products are combustible and should be protected from flames and other high heat sources. 
DuPont
™
 Flashing Systems products will not support combustion if the heat source is 
removed. However, if burning occurs, ignited droplets may fall away from the point of 
ignition. For more information, call 1-800-44-Tyvek.
DuPont
™
 Residential Sealant and DuPont
™
 Commercial Sealant are irritating to skin, eyes, and 
respiratory tract. For proper usage, follow directions stated on the product label. For health 
information, refer to the Material Safety Data Sheet or call Chemtrec at 1-800-424-9300.
Note
When installed in conjunction with other building materials, DuPont
™
 Flashing Systems products 
must be properly shingled with these materials such that water is diverted to the exterior of the 
wall system. DuPont
™
 Tyvek
®
 products are air and water barriers and not the primary water barrier. 
The outer facade is the primary barrier. You must follow facade manufacturer’s installation and 
maintenance requirements for all facade systems in order to maintain water holdout properties and 
ensure performance of DuPont
™
 Tyvek
®
 products. Use of additives, coatings or cleansers on or in the 
facade system may impact the performance of DuPont
™
 Tyvek
®
 WRB. DuPont
™
 Tyvek
®
Weatherization Systems products are to be used as outlined in this installation guideline. DuPont
™
FlashingSystemsproductsshouldonlybeusedtosealpenetrationsandashopeningsinhouses
or buildings. DuPont
™
 Flashing Systems products are not to be used in roofing applications. For 
superior protection against bulk water penetration, DuPont suggests a system combining a quality 
exterior facade, a good secondary WRB and exterior sheathing, high quality windows and doors, 
andappropriateashingmaterialspayingattentiontoproperinstallationofeachcomponent.Ina
system where no exterior sheathing is used and the DuPont
™
 Tyvek
®
 WRB is installed directly over 
the wall studs, exterior facade materials should be selected to ensure maximum protection against 
water intrusion. Careful workmanship and proper installation of each component is very important.
DuPont believes this information to be reliable and accurate. This information may be subject to 
revision as additional experience and knowledge is gained. It is the user’s responsibility to 
determine the proper construction materials needed on each project. 
For complete warranty information, please visit www.Weatherization.Tyvek.com or call 
1-800-44-Tyvek.
This information is not intended to be used by others for advertising, promotion or other publication 
for commercial purposes.










