Taylor Zephyr Moisture Vapor Barrier - 4 Gal

Taylor Moisture Vapor Barrier 4 Gallon (Zephyr)

The Taylor Moisture Vapor Barrier, part of the Zephyr Signature Line, is a one-part moisture control coating designed to protect concrete and porous subfloors before flooring installation. It helps reduce moisture vapor transmission and also works as a primer and adhesive residue encapsulator. This allows installers to complete subfloor preparation in a single, efficient step.

This 4-gallon format is ideal for larger spaces or multi-room projects where consistent coverage, fast turnaround, and dependable moisture control are important.

How This Product Is Used

Zephyr is applied directly to properly prepared concrete or porous substrates using a roller. Once cured, it forms a clear, continuous film that helps block moisture vapor from migrating into finished flooring.

Depending on project needs, it can be used to reduce moisture vapor transmission prior to flooring installation, prime porous substrates to improve bond performance, and encapsulate well-bonded existing adhesive residues such as cutback.

The product is ready to use straight from the pail and does not require mixing or stirring.

Performance & Reliability

Zephyr provides reliable moisture mitigation for many common slab conditions. It delivers approximately 93 percent relative humidity protection with one coat and up to 95 percent relative humidity with two coats when applied at recommended coverage rates. This makes it well suited for moisture-sensitive flooring installations where added protection is needed.

Installation & Application Experience

Designed with installer efficiency in mind, Zephyr spreads smoothly with a standard paint roller and dries quickly. In most cases, it allows recoat or flooring installation within one to two hours per coat. The clear-drying finish makes it easy to confirm proper coverage, while the low-odor formula improves comfort during application.

Where This Product Works Best

• Concrete slabs with moderate moisture concerns
• Residential, multi-family, and light commercial installations
• Under vinyl plank, vinyl tile, laminate, and engineered hardwood
• Projects with existing, well-bonded adhesive residue
• Jobs that require both moisture control and priming in one step

Quick Specs Summary

• Container size: 4 gallons
• Product type: One-part moisture vapor barrier, primer, and encapsulator
• Moisture protection: Approximately 93 percent RH with one coat and up to 95 percent RH with two coats
• Coverage: Approximately 350 square feet per gallon for one coat or 200 square feet per gallon for two coats
• Cure time: Approximately one to two hours per coat
• VOC content: Zero VOC with very low odor
• Roller applied and ready to use

Why This Is a Good Choice

The Taylor Zephyr Moisture Vapor Barrier simplifies subfloor preparation by combining moisture mitigation, priming, and residue encapsulation into a single product. Its fast cure time helps keep projects moving, and its low-odor, zero-VOC formulation makes it suitable for indoor environments where air quality matters. For installers and homeowners looking for dependable moisture control without unnecessary complexity, Zephyr offers a practical and efficient solution.

Please refer to the Product Data sheet under the Warranty, Installation and Care tab for further information.