VaporFlex Standard & Premium

VaporFlex® Geomembranes

Your Ultimate Defense Against Moisture, Mold, and Harmful Gases.

Layfield’s VaporFlex® is the trusted solution for defending concrete slabs and foundations against moisture infiltration, mold, and harmful gases—a pervasive threat for property owners and the construction industry across North America. Available in a standard and premium formulation, VaporFlex® sets the standard for effectiveness in the building industry, surpassing ASTM E-1745 Class A, B, and C requirements.

Within the VaporFlex® line, VaporFlex® Premium takes protection to new heights. Experience unmatched defense against methane, radon, and harmful VOCs, boasting over 100 times less permeability than standard polyethylene vapor retarders. Rigorously tested and verified, VaporFlex® Premium stands as your reliable defense against a range of threats, from BTEX and HS to methane, radon, and beyond.

What’s The Difference Between VaporFlex® Premium And Other underslab Barriers?

Wide Range of Chemical Testing Completed

Tested to a wide range of VOCs, including benzene, toluene, and xylene, VaporFlex® demonstrates the highest barrier characteristics.

Enhanced Performance Properties

EVOH is a flexible thermoplastic copolymer with excellent flex-crack resistance and very high resistance to hydrocarbons, oils, and organic solvents.

Resistance To Decay And Degradation

The EVOH film is encapsulated between layers of polyolefin film to protect it from the elements.

Additional Features

  • Superior puncture resistance
  • Odor management
  • Can be prefabricated in large panels for easy install
  • Suitable for a broad range of applications
VaporFlex® Geomembranes

vaporflex® standard (10/15 mil)

VaporFlex® is the trusted solution for safeguarding concrete slabs and foundations from moisture infiltration, halting mold formation and growth. With mold posing a significant liability for property owners and the construction industry throughout North America, VaporFlex stands as a proven defense. Engineered to surpass ASTM E1745 Class A requirements, VaporFlex offers unparalleled protection against the costly consequences of moisture-related issues.

vaporflex® premium (20 Mil)

VaporFlex® Premium is a seven-layer coextruded barrier manufactured using high-grade virgin polyethylene and EVOH resins. This barrier offers exceptional impact strength and outstanding gas and moisture transmission resistance. VaporFlex® Premium is designed to effectively mitigate hazardous vapor intrusion, safeguarding indoor air quality and prioritizing the safety and health of building occupants. VaporFlex® Premium exceeds ASTM E-1745 Class A, B, and C requirements. Available in 20 (Class A)mil thickness, it is designed to meet the most stringent requirements.


Layfield Geosynthetics offers essential accessories to complement its VaporFlex® product line, including VaporSeal™ Tape and Butyl Seal Tape, ensuring comprehensive solutions for effective vapor barrier installation and superior sealing performance.

Butyl seal is a double-sided aggressive reinforced black butyl rubber tape used to join panels of polyethylene and polypropylene together by overlapping the edges and applying Butyl Seal in between.
VaporSeal™ Tape is a patent pending single sided 7-layer gas barrier tape with a release liner for ease of installation. The backing contains a layer of highly impermeable EVOH designed to block migration of radon, methane, and VOC’s.

Product Details

VaporFlex® Standard offers trusted protection for concrete slabs and foundations, preventing moisture infiltration and inhibiting mold growth. Meanwhile, VaporFlex® Premium features a seven-layer co-extruded geomembrane with an ethylene vinyl alcohol (EVOH) core layer, providing superior defense against methane, radon, and volatile organic compounds (VOCs).


Specification Sheet,

VaporFlex® Standard Technical Specification

View Document
Specification Sheet,

VaporFlex® Premium Technical Specification

View Document


Explore the resources available to help you acquire additional knowledge on our products. If you cannot find what you are looking for, we are here to help.

Case Studies

Discover a wide range of completed Layfield projects in various applications worldwide.

VOC Barrier with VaporFlex® Premium in Coquitlam
Vapor Barrier Nakal'Bun Elementary School


Our Technical Services Team continuously creates and presents webinars and lunch presentations to better educate our clients. We would be happy to provide you and your group with a customized presentation based on your specific needs. We are also pleased to provide a series of pre-recorded webinars curated for this product group and shown below.

Thu 18
Environmental Containment

Next Generation Geomembranes: Introducing HeatGard, GeoFlex, and VaporFlex

Join Layfield’s Rohit Sati, Technical Product Manager – Containment and Enclosure Systems, as he discusses Layfield’s next-generation geomembranes, developed with the highest quality resins and additives to withstand the most challenging environments. Our webinar will provide insight into the key performance properties and suitable applications for these materials.

Tue 7
Environmental Containment

Under-slab Barrier Selection For Water Vapor and Soil and Gas

Join Layfield Geosynthetics Justin Gouthreau, Engineering Business Manager – Group Manager, as he discusses under-slab barrier options to manage soil gases from contaminates encountered in brownfield development. The presentation will discuss typical barrier design, installation, and address common challenges faced during installation.

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