WhiteCap®
VOC Block
Reinforced Poly Liner


WhiteCap® VOC Block is a revolutionary new reinforced poly liner and the industry’s only true gas, vapor and moisture barrier that will truly improve the indoor air quality in your home.

This heavy duty liner undergoes a specialized laminating process that marries seven layers of protective materials into one unique system. The EVOH infused core layer of WhiteCap VOC Block is the key to protecting your family’s health while also preventing damage to your home from the outside elements. When installed in your home, you get all of the benefits of encapsulation plus extra peace of mind.

Learn more about the WhiteCap Crawl Space System and the benefits of becoming a certified installer at https://whitecapcrawlspacesystem.com/.

  • 7 Layers VOC Block WhiteCap Liner
  • Rolls VOC Block WhiteCap Liner
  • Section VOC Block WhiteCap Liner
  • Before VOC Block WhiteCap Liner
  • After VOC Block WhiteCap Liner

Product Overview

Over the years, the crawl space industry has seen advancements in liners from single layer 6 mil poly to 20 mil multi-layer polyethylene with skrim and reinforcement. These liners have offered excellent protection against moisture and tears, but only moderate resistance to gases and vapors. If you are working on a project that has no threat of volatile organic compounds, WhiteCap® Standard and WhiteCap® Premium are excellent options. If you are working in a home or building that has concerns about radon, benzene, contaminated groundwater, dangerous soil vapor or other VOC’s, WhiteCap® VOC Block is the solution!

Thanks to the stack effect, we know that air finds its way into the home through the basement or crawlspace and that air rises to the upper levels. That means that whatever odors, gases, mold or allergens exist in the basement or crawl space are circulating throughout the entire home or building. WhiteCap VOC Block is the industry’s only true gas, vapor and moisture barrier, and it will truly improve the indoor air quality in the home. A specialized laminating process marries seven layers of protective materials into one unique system that is up to 800% more effective at keeping dangerous gasses and VOC’s at bay. Imagine the benefits you can now offer your customer with WhiteCap® VOC Block. For maximum protection and performance, Nash recommends installation of WhiteCap Drainage Matting as a base layer prior to installation of VOC Block.

WhiteCap® VOC Block provides protection against:

  • Moisture, mold and mildew
  • Dangerous gases and soil contaminants
  • Residue from pest and animal infestations
  • Plus, Volatile Organic Compound (VOC’s)

WhiteCap Protection Plan

If a WhiteCap PureDry 70 dehumidifier is purchased and installed with a WhiteCap VOC Block crawl space liner system, including Drainage Matting, Nash Distribution will provide a 2 Year Extended Warranty as part of the WhiteCap Protection Plan.

Key Benefits

  • Stops/reduces foul odors.
  • Prevents mold & mildew.
  • Reduces energy & HVAC costs
  • Cord reinforced to increase strength & tear resistance.
  • Stops moisture.
  • Stops harmful vapors & gases.
  • Seal off contaminants from prior sewer leaks & animal droppings.
  • Improves indoor air quality.

Recommended Uses

  • Crawl Space Vapor Barrier
  • Modular Tank Liners
  • Remediation Liners
  • Remediation Covers
  • Erosion Control Covers
  • Vapor Retarders
  • Earthen Liners
  • Landfill Caps
  • Aquaponic Liners
  • Interim Landfill Covers
  • Daily Landfill Covers
  • Shrimp & Fish Pond Liner

Product ID / Size Chart

  • VOC10WGM12X100 / 10 mil - White on Green - 12’ x 100’
  • VOC10WGM4X200 / 10 mil -White on Green - 4' x 200'

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Customer Reviews

Average rating for Nash Distribution is 4.98 stars of 5 stars - based on 29 reviews

I love using your crawl space vapor barriers! They're so easy to work with!

Steven K. - Lincoln, NE 68504