DuPont™ Tyvek® Fluid Applied WB+™
Fluid Applied Weather Barrier for Commercial Wall Substrates Including CMU and Gypsum Sheathing
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.
Resources
Product Information Sheets Installation Guides Guide Specifications Technical Documents Brochure Codes & Certifications Fire Performance Case Study Warranty
Features & Benefits
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.
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.
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).
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
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:
(mortar)
lbf/in (aluminum)
Smoke Developed = 10
320 %
99 %
No Leakage
Tested to 15 psf
25-30 % (by wt) g/L
No Cracking at 25 mil Thickness
Code Compliance
<b>Tyvek® Fluid Applied WB+™</b> complies with the following codes:
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
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 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 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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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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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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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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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 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.
