Vapor Block™ 6, 10 & 15 are high performance underslab vapor retarders designed to retard moisture migration through concrete slabs-on-grade. Vapor Block™ is made from state-of-the-art polyethylene resins that provide superior physical and performance properties that far exceed ASTM E-1745 (Plastic Water Vapor Retarders Used in Contact with Soil or Granular Fill Under Concrete Slabs) Class A, B and C requirements.
High tensile strength, unequaled puncture resistance, low moisture vapor permeability as well as resistance to decay make Vapor Block one of the most effective underslab vapor retarders on the market today! Available in 6,10 and 15 mil thicknesses to best meet required performance specifications.

Vapor Block impedes the transmission of water vapor from traveling upward through a concrete slab-on-grade or through a concrete wall when properly installed. It is extremely important to avoid puncturing a vapor retarder during installation to assure proper performance. Vapor Block’s puncture strength is second to none, withstanding even the most demanding installation conditions.

Vapor Block vapor retarders protect your flooring and other moisture sensitive furnishings in your building’s interior from moisture migration. Vapor Block™ vapor retarders can also greatly reduce condensation, mold and degradation by controlling water vapor migration.

Residential application

Commercial Application

Vapor Block 6 &10 are available in 15’ x 200’ rolls for ease of installation and maximum coverage. Vapor Block 15 is available in 12’ x 200’ rolls. Other custom sizes are available depending upon size and volume requirements. All rolls are folded and rolled on heavy-duty cores for ease in handling and installation. Installation instructions and ASTM E-1745 classifications accompany each roll.


  • Under-Slab Vapor Retarder
  • Crawl Spaces
  • Foundation Wall Vapor Retarder


Vapor Block 6
Vapor Block 10
Vapor Block 15


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