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DuPont™ Tyvek® Fluid Applied WB+™

Fluid Applied Weather Barrier for Commercial Wall Substrates Including CMU and Gypsum Sheathing

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DuPont™ Tyvek® Fluid Applied WB+™

Fluid Applied Weather Barrier for Commercial Wall Substrates Including CMU and Gypsum Sheathing

<br><b>DuPont™ Tyvek® Fluid Applied WB+™</b> is a fluid applied air a barrier protection engineered for the unique demands of heavy commercial construction projects. Based on a unique formulation using silyl-terminated polyether polymer technology, <b>Tyvek® Fluid Applied WB+™</b> offers low shrinkage during curing, superior elongation and recovery and can be easily applied in one coat.
 
 
 
 
 
 

Features & Benefits 

 
 
 

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Ease of Installation
  • Single component, one-coat application.
  • Offers 2 to 3 times the coverage of competitive products.
  • Approximately 50 to 65 sq. ft./gallon in one coat, depending on substrate conditions (temperature and moisture), substrate porosity, and uniformity of application.
  • Spray or pressure roll for fast and easy application.
  • Exhibits low shrinkage during curing, helping to minimize the risk of cracking and pin-holing.
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High Performance Durability
  • Not water soluble and will not wash off the wall when exposed to bulk water, even before curing.
  • Can be installed on damp surfaces, defined as when no moisture is transferred to the skin upon touching the substrate.
  • Cured membrane exhibits exceptional elongation and recovery properties.
  • When stretched, it acts like a rubber band, allowing the membrane to move with the building.
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Temperature and UV Resistance
  • Withstands up to nine months (270 days) of UV exposure.
  • Installation temperature range 25 °F (-4 °C) to 140 °F (60 °C).
  • Maximum in-service temperature of 180 °F (82 °C).
  • Low VOC (25-30 g/l).
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Air and Water Barrier Performance
  • Offers an ideal combination of air and water holdout with vapor permeability.
  • Exceeds ABAA, ASHRAE 90.1, and IECC air leakage requirements (ASTM E2357).
  • Water infiltration resistance up to 15psf when tested in accordance with ASTM E331.
  • Offers >90% drainage efficiency when tested in accordance with ASTM E2273.
  • Meets ASTM E2556, Type II standards for vapor permeable flexible sheet water-resistive barriers.
  • Shields insulation from drafts and minimizes air infiltration and exfiltration, enhancing HVAC efficiency.
  • Lowers energy consumption for heating and cooling, reducing costs.
  • Prevents damage to wood, metal, and mold growth.
  • Keeps insulation dry, maintaining its installed R-value.
 
 
 

Specifications

 
 
 

Standard Sizes

Unit Unit Size
Pail 5 Gallons
Drum 50 Gallons
 
 
 

Testing

<b>Tyvek® Fluid Applied WB+ </b> exhibits the properties and characteristics indicated in the table below when tested as represented. Review all instructions and (Material) Safety Data Sheet ((M)SDS) before use. Please contact your local DuPont™ Tyvek Specialist before writing specifications around this product. Product properties are as follows:

TEST METHOD TEST TITLE PROPERTY RESULTS
AIR
ASTM E1677 Standard Specification for Air Barrier (AB) Material or Assemblies for Low-Rise Framed Building Walls Wall Assembly Air & Water Leakage Type 1
ASTM E2178 Standard Test Method for Determining Air Leakage Rate and Calculation of Air Permeance of Building Materials Air Penetration Resistance .0002 cfm/ft2@ 75 Pa (1.57 psf)
ASTM E2357 Standard Test Method for Determining Air Leakage Rate of Air Barrier Assemblies Wall Assembly Air Penetration Resistance <0.0002 cfm/ft2@ 75 Pa
ASTM E283 Standard Test Method for Determining Rate of Air Leakage Through Exterior Windows, Skylights, Curtain Walls, and Doors Under Specified Pressure Differences Across the Specimen Wall Assembly Air Penetration Resistance <0.0002 cfm/ft2@ 75 Pa
TAPPI T460 Air resistance of paper (Gurley method) Air Penetration Resistance >10,000 sec/100cc
ADHESION
ASTM C794 Standard Test Method for Adhesion-in-Peel of Elastomeric Joint Sealants Adhesion - in - Peel Pass lbf/in.
(mortar)
ASTM D903 Standard Test Method for Peel or Stripping Strength of Adhesive Bonds Peel Strength 13 Cohesive Failure
lbf/in (aluminum)
ASTM D4541 Standard Test Method for Pull-Off Strength of Coatings Using Portable Adhesion Testers Adhesion Strength - Exterior Gypsum (delaminates fiber glass top sheet) >25 psi
ASTM D7234 Standard Test Method for Pull-Off Adhesion Strength of Coatings on Concrete Using Portable Pull-Off Adhesion Testers Adhesion Strength - Concrete >33 psi
FIRE
NFPA 285 Standard Fire Test Method for Evaluation of Fire Propagation Characteristics of Exterior Wall Assemblies Containing Combustible Components Flame Propagation. Multiple Assemblies Pass
ASTM E84 Standard Test Method for Surface Burning Characteristics of Building Materials Surface Burning Characteristics Class A Index Flame Spread = 15
Smoke Developed = 10
STRENGTH
ASTM D412 Standard Test Methods for Vulcanized Rubber and Thermoplastic Elastomers—Tension Tensile Elongation at Break Recovery (held at 300% elongation) 140 psi
320 %
99 %
ASTM D2240 Standard Test Method for Rubber Property—Durometer Hardness Hardness 34 Shore A
ASTM D1970 Standard Specification for Self-Adhering Polymer Modified Bituminous Sheet Materials Used as Steep Roofing Underlayment for Ice Dam Protection Nail Sealability Pass
No Leakage
WATER
AATCC 127 Test Method for Water Resistance: Hydrostatic Pressure Water Penetration Resistance >1000 cm
ASTM E96 Standard Test Methods for Gravimetric Determination of Water Vapor Transmission Rate of Materials Water Vapor Transmission 22 @ 25 mils thick Method B Perms
ASTM E331 Standard Test Method for Water Penetration of Exterior Windows, Skylights, Doors, and Curtain Walls by Uniform Static Air Pressure Difference Wall Assembly Water Penetration Resistance No Leakage
Tested to 15 psf
ASTM C1250 Standard Test Method for Nonvolatile Content of Cold Liquid-Applied Elastomeric Waterproofing Membranes VOC <2
25-30 % (by wt) g/L
GENERAL
ASTM D2369 Standard Test Method for Volatile Content of Coatings Solids 0.99
ASTM C1305 Standard Test Method for Crack Bridging Ability of Liquid-Applied Waterproofing Membrane Low Temperature Crack Bridging Pass
No Cracking at 25 mil Thickness
ASTM C679 Standard Test Method for Tack-Free Time of Elastomeric Sealants Skin Over Time @ 50% R.H. and 70° F 1 to 2 hrs
 
 
 
 
 
 
 
 
 
 
 
 

Code Compliance

<b>Tyvek® Fluid Applied WB+™</b> complies with the following codes:

Code Description
US Product Listings & Verifications ASHRAE 90.1 and IECC air leakage requirements when tested in accordance with ASTM E2357.<br>AC 212 Acceptance Criteria for Water Resistive Barriers over Exterior Sheathing<br>IBC, Section 1403.2 , 1405.4.
 
 
 
 
 
 
 
 
 
 
 
 

FAQ

Can continuous insulation be applied directly over cured Tyvek® Fluid Applied WB+™?
Yes, continuous insulation can be mechanically fastened directly over DuPont™ Tyvek® Fluid Applied WB+™ that has cured for a minimum of 48 hours.
Can stucco façade be directly applied to DuPont™ Tyvek® Fluid Applied WB+™?
No, stucco should not be direct applied to DuPont™ Tyvek® Fluid Applied WB+™, due in part to adhesion level and the risk of cracking.When the DuPont™ Tyvek® Fluid Applied WB+™ is used behind stucco, it should be separated from the stucco by an intervening layer per section 2510.6 of the 2015 International Building Code.
What are the acceptable methods for attaching continuous insulation to cured Tyvek® Fluid Applied WB+™?
Continuous insulation must be mechanically fastened through Tyvek® Fluid Applied WB+™. The use of adhesives, mastics, and sealants is not permitted and will void the 10-Year Limited Product Warranty.
Can DuPont™ Tyvek® CommercialWrap® or CommercialWrap® D be used as an intervening layer with DuPont™ Tyvek® Fluid Applied WB+™?
DuPont™ Tyvek® CommercialWrap® products can be used as an intervening layer over DuPont™ Tyvek® Fluid Applied WB+™ with stucco façade.An intervening layer of Tyvek® building wrap can be installed after Tyvek® Fluid Applied WB+™ has cured for 24 hours.
Can Tyvek® Fluid Applied WB+™ be installed in an interior space and/or in a non-ventilated area?
No, Tyvek® Fluid Applied WB+™ should only be sprayed in a well-ventilated area using a NIOSH approved respirator along with additional PPE.
Can black paper and/or felt be used over Tyvek® Fluid Applied WB+™ as an intervening layer?
Yes, black paper and/or felt can be used over Tyvek® Fluid Applied WB+™ as an intervening layer.An intervening layer can be installed after Tyvek® Fluid Applied WB+™ has cured for 24 hours.
When I have a building with multiple substrates, like CMU and gypsum or OSB sheathing, how can DuPont™ Tyvek® Fluid Applied WB+™ and DuPont™ Tyvek® mechanically fastened wrap work together?
DuPont™ Tyvek® Fluid Applied System can be used as a stand-alone offering or as part of an integrated system combined with DuPont™ Tyvek® Commercial Wrap or Tyvek® CommercialWrap® D. The two air and water barrier systems integrate easily using DuPont’s butyl based self-adhered flashing products, primarily DuPont™ StraightFlash™. On buildings where you have multiple substrates, DuPont offers an integrated air barrier system. For proper installation of DuPont™ Tyvek® Fluid Applied System and Tyvek® Commercial Wraps, the products should be integrated in accordance with the current DuPont Installation Guidelines to ensure proper adhesion, and to maintain the high performance of all materials. To ensure the best transition between the mechanically fastened wrap and the fluid applied material, first terminate the Tyvek® CommercialWrap® product on the adjoining substrate by using DuPont™ StraightFlash™. Be sure to prime the substrate where the DuPont™ StraightFlash™ will be adhered if the current DuPont Installation Guideline calls for such priming with a recommended adhesive/primer. Priming is required when applying over concrete, masonry, and fiber-faced exterior gypsum board substrates. Please refer to the Chemical Compatibility of Representative Building Sealants and Adhesives/Primers document for a list of some adhesives/primers that have been evaluated with DuPont Self-Adhered Flashing Products. Next, apply DuPont™ Tyvek® Fluid Applied WB+™, overlapping it by a minimum of 2 inches onto the StraightFlash™. For detailed installation instructions, please see the DuPont™ Tyvek® Fluid Applied WB+™ Wall and Substrate Guidelines at www.fluidapplied.tyvek.com.
Can DuPont™ Tyvek® Fluid Applied WB+™ be used below grade and/or for interior applications?
DuPont™ Tyvek® Fluid Applied WB+™ is vapor permeable and is only approved for exterior above grade vertical wall surface. The designated use and approved wall substrates are based on performance which has been validated through extensive testing, for which DuPont offers a 10-Year Limited Product Warranty.
What is the maximum recommended hose length for spraying DuPont™ Tyvek® Fluid Applied WB+™?
The maximum recommended hose length for spray operations is 100ft. If the installing professional wants to use hose lengths longer than 100 ft, DuPont recommends product application by power rolling.
How long does the DuPont™ Tyvek® Fluid Applied WB+™ need to cure prior to the installation of exterior façade?
DuPont™ Tyvek® Fluid Applied WB+™ must be cured for a minimum of 48 hours prior to the installation of the exterior facade.
How is DuPont™ Tyvek® Fluid Applied WB+™ packaged?
Tyvek® Fluid Applied WB+™ is available in a 5-gallon pail and a 55-gallon drum that contains 50 gallons of product in an aluminum liner.Both options are re-sealable and the lids feature an integrated pouring spout/hose inlet.
Can DuPont™ Tyvek® Fluid Applied WB+™ be used as the flashing material?
DuPont™ Tyvek® Fluid Applied WB+™ can be used alone to treat sheathing joints less than 1/16” but it was specifically engineered for fast and effective application to the building envelope exterior wall surface by spraying or power rolling.The lower viscosity of the productmakes it more difficult to fill gaps and voids and achieve the mil thickness required for optimum performance around the window openings and other penetrations. DuPont™ Tyvek® Fluid Applied Flashing and Joint Compound+ has been specifically engineered for flashing commercial windows. DuPont™ Tyvek® Fluid Applied Flashing and Joint Compound+ is a higher viscosity product but can be brushed or troweled to easily treat the window opening while offering exceptional gap filling performance.
 
 
 
 
 
 

Additional Learning

How to Install

Learn the essential steps for installing DuPont™ Tyvek® as part of a high‑performance building envelope system. Our installation guides will show how proper installation helps maximize air and water protection for long‑lasting home durability.

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Vapor Permeability

Vapor permeability plays a critical role in protecting walls from trapped moisture, mold and rot. Learn how DuPont™ Tyvek® water-resistive barriers provide the ideal balance of air and water resistance with high breathability to help walls dry effectively.

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Air Leakage Testing

Air leakage testing shows DuPont™ Tyvek® assemblies deliver superior performance beyond required codes and standards. Discover how DuPont’s enhanced testing methods validate a high‑performance air barrier system designed for lasting protection and efficiency.

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Tyvek ® Specialist Network

The DuPont Building Envelope Specialist Network delivers hands‑on technical support, training and guidance to help teams build durable, energy‑efficient structures. Discover how DuPont pairs advanced product performance with unmatched field expertise to support your project every step of the way.

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Tyvek ® Warranty

DuPont offers a full range of product and system warranties designed to protect builders and property owners with reliable, long‑term coverage. Explore how DuPont™ Tyvek® warranties, along with expert project support, help ensure durable, high‑performing building envelope systems.

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Sustainable Buildings

Learn how DuPont is advancing sustainable construction with building envelope systems designed to improve energy efficiency, indoor environmental quality, and long‑term durability. Discover how DuPont™ Tyvek® water-resistive barriers help reduce air leakage, protect insulation performance, and support greener, longer‑lasting buildings.

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NFPA 285

DuPont™ Tyvek® water-resistive barriers have been tested and proven to meet the NFPA 285 fire performance standard for exterior wall assemblies. Learn how Tyvek® products help support compliant, fire‑resistant wall designs across a wide range of materials and configurations.

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Air Leakage Testing

Air leakage testing shows DuPont™ Tyvek® assemblies outperform required industry standards for commercial air barriers. Discover how DuPont’s rigorous thermal cycling and high‑pressure testing validate a high‑performance system designed to protect buildings for years to come.

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