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Stego® Wrap Class A Vapor RetardEr (10-Mil)

Durable, Permanent, Vapor Mitigation 

Stego Wrap Class A 10-Mil Vapor Retarder is a below-grade vapor retarder that is manufactured with a  proprietary blend of prime virgin polyolefin resins and additives to provide outstanding efficacy.

The Stego Wrap Class A Vapor Retarder is a technologically advanced material that provides moisture protection in a broad range of environments and may also be used in systems for the control of gases (radon and methane migration). The Stego Wrap Class A 10-Mil Vapor Retarder is an economical vapor protection option for projects not requiring 0.01 or less permeance, while still exceeding performance requirements of ASTM E1745 Class A.

Its many features include:

  • Excellent puncture resistance
  • Helps shield from soil gases such as methane and radon
  • Aids in protection against flooring failures
  • Provides superb below-concrete vapor protection
  • Less vulnerable to deterioration when compared to generic, recycled 6-mil poly
  • Exceeds ASTM E1745 Class A, B & C
  • Made in the USA


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New call-to-actionStego Class A 10-Mil Vapor Retarder has low permeance, providing a high level of vapor protection for interior slabs. Engineered to provide superior strength and durability, never flaking, and resisting tears, snags, punctures, or cracks, this product is compatible with Stego’s myriad of installation accessories, helping to meet the installation requirements of ASTM E1643.

Engineered Performance – Life of the Building Protection
Stego offers the first-of-its-kind warranty for its line of vapor barriers and retarders. The Stego Life of the Building Warranty reinforces its 20+ year track record without a single claim of product failures, making Stego the construction industry leader in below-slab barriers. The warranty matches the unparalleled Stego Installation Support - a FREE SERVICE designed to help achieve an effective installation and add value for project teams.

APPLICABLE STANDARDS American Society for Testing & Materials (ASTM):  

    • ASTM E1745: Standard Specification for Water Vapor Retarders Used in Contact with Soil or Granular Fill Under Concrete Slabs
    • ASTM F1249: Test Method for Water Vapor Transmission Rate through Plastic Film and Sheeting using a Modulated Infrared Sensor
    • ASTM D1709: Test Methods for Impact Resistance of Plastic Film by Free-Falling Dart Method
    • ASTM D882: Test Method for Tensile Properties of Thin Plastic Sheeting
    • ASTM E154: Standard Test Methods for Water Vapor Retarders used in Contact with Earth under Concrete Slabs, on Walls, or as Ground Cover

Physical Properties:

    • Water Vapor Permeance: 0.0254 perms
    • Puncture Resistance: 3,006 grams
    • Tensile Strength: 50.6 lbf/in
    • Thickness: 10-mil
    • Dimensions: 14' x 210' (2,940 ft2)
    • Roll Weight: 146 lbs

Additional Benefits:

    • Engineered for durability and longevity
    • Reduces mold – moisture is one of the ingredients for mold, and with less moisture the likelihood of mold growth should also decrease
    • Better flooring – without proper moisture protection, it is possible to have flooring failures
    • Indoor Air Quality (IAQ) improvement – reduction in soil contaminants, mold, and mildew
    • Available nationwide
    • Life of the Building Warranty
    • Stego Installation Support

New call-to-actionStego has the accessories you need to complete an ASTM E1643-compliant installation. Stego Tape, Stego Mastic, Stego Crete Claw Tape and StegoTack Tape enable efficient vapor barrier installations, saving time and resources.


Stego Tape

A low permeance tape designed for use...

Stego Mastic

Stego Mastic

A liquid applied vapor retardant membrane...


Stego Crete Claw Tape

A multi-layered tape...



A double-sided adhesive strip used to bond...

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