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  • Stego Wrap installation within a warehouse
  • Stego Wrap installation with concrete screed equipment
  • Stego Wrap Installation with Stego Tape at seams
  • Aerial view of Stego Wrap installation with Stego Tape at seams
  • Aerial view of Stego Wrap installation at unfinished construction site

STEGO® WRAP Class C Vapor Retarder (10-Mil)

A Reliable and Cost-Effective Solution to Reduce Moisture Migration

Stego Wrap Class C 10-Mil Vapor Retarder is manufactured with a specific, advanced blend of premier polyolefin resins and additives to provide outstanding performance. This Class C Vapor Retarder is commonly utilized under below-grade interior slabs to reduce the amount of moisture vapor migrating from the ground into the building's concrete slab. 

The Stego Wrap Class C 10-Mil Vapor Retarder provides protection in a broad range of environments and may also be used in systems for the reduction of soil gas (radon and methane) migration. While still exceeding ASTM E1745 Class product requirements, Stego Wrap Class C 10-Mil Vapor Retarder provides an economical option for projects. 

Its many features include:

  • Durable enough to prevent punctures and tears in light foot traffic construction conditions
  • Helps shield from soil gases such as methane and radon
  • Aids in protection against flooring failures
  • Superior performance protection when compared to generic, recycled 6-mil poly
  • Less vulnerable to deterioration when compared to generic, recycled 6-mil poly
  • Exceeds ASTM E1745 Class C
  • Made in the USA


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New call-to-actionStego Wrap Class C 10-Mil Vapor Retarder has low permeance, providing a high level of protection for a vapor retarder. Not as durable as the Stego Wrap Class A 10-Mil Vapor Retarder, this product can be an economical benefit in construction with light-machine or foot-traffic-only construction conditions. 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: 0.0209 perms
    • Puncture Resistance: 1,286 grams
    • Tensile Strength: 49.16 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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