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White Cap 100 mil Radiant Vapor Barrier

White Cap 100 mil Radiant Vapor Barrier


The White Cap 100 mil Radiant Vapor Barrier, featuring a foil-backed woven exterior, is engineered to seal basements and crawl spaces effectively. Its construction integrates a vivid white, cross-woven outer layer with a dense, flexible foam core and a foil backing, ensuring top-tier defense against moisture, mold, mildew, allergens, and fungi. With a thickness of 100 mils and the reliability of the White Cap brand, this barrier surpasses ASTM standards, making it the premier choice for encapsulating your basement and crawl space.

Key Features:

  • ASTM tested for additional moisture protection
  • Conforms nicely to piers, columns, and transitions
  • Metalized film creates a “zero-perm” barrier to moisture and gases
  • Available in multiple configurations
  • May be used for radiant barrier applications by reversing the foil side inward
  • Lightweight and easy to handle
  • Inorganic and will not support mold growth
  • Cushioned for comfort — great for installers, homeowners, and service technicians

Recommended Uses:

  • Crawl space Vapor barrier Insulation
  • Basement wall vapor barrier/ Waterproofing projects

Product ID / Size Chart:

  • WCWW100-4X125 RAD: 4’ X 125’ Roll – White/ Foil


SKU: N/A Categories: , ,

This product is currently out of stock and unavailable.

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The White Cap 100 mil Radiant Vapor Barrier boasts a foil-backed, cross-woven structure coupled with a foam core, delivering unmatched defense against moisture, mold, and allergens in basements and crawl spaces.

This ASTM-compliant, lightweight barrier is equipped with a metalized film, creating an effective “zero-perm” shield against moisture and gases. Its adaptability is showcased through a variety of sizes and uses, including insulation and waterproofing, all while inhibiting mold formation and promoting user comfort.

Additional information

Weight N/A
Dimensions N/A

4’ X 125’ Roll – White/ Foil, 6’ X 125’ Roll – White/Foil


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