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12 Mil Liner

WhiteCap Premium 12 mil reinforced vapor barrier liner is ideal for dirt, gravel and concrete crawl space encapsulation jobs. WhiteCap Premium 12 mil plastic sheeting can be used to cover both walls and floors. This 12 mil reinforced liner can be used indoors and outdoors due to its construction.

Learn more about the WhiteCap Crawl Space System and the benefits of becoming a certified installer at

  • WhiteCap Premium
  • WhiteCap 12 Mil Premium white vapor barrier
  • WhiteCap 12 Mil Premium white vapor barrier

Product Overview

WhiteCap Premium 12 mil liner is a four-layer reinforced extrusion laminate. The black outer layer consists of a high-strength polyethylene film containing carbon black. The white side contain UV and thermal stabilizers. The white outer layer is also designed to reduce heat buildup and condensation. WhiteCap Premium 12 mil is reinforced with a heavy-duty scrim laid in a diagonal pattern with an additional machine direction scrim every 3” across the width. The individual plies are then laminated together with molten polyethylene. The heavy scrim reinforcement placed between these plies greatly enhances tear resistance and increases service life. WhiteCap’s heavy-duty diamond reinforcement responds to tears immediately by surrounding and stopping the tear.

Key Benefits

  • Increased Tear and Puncture Resistance
  • Added UV Inhibitors.
  • Have Increased Resistance To Permeability.
  • Meets or Exceeds ASTM E-1745 Class C Standard

Recommended Uses

  • Crawl Space Encapsulation
  • Cargo Coverings
  • Interim Landfill Covers
  • Daily Landfill Covers
  • Temporary Erosion Control
  • Divider Curtains
  • Remediation Covers or Liners
  • Pit/Pond Liners
  • Underslab Vapor Retarders
  • Temporary Earthen Liners
  • Temporary Rainshed Covers

Product ID / Size Chart

  • R12WBK-12'X100' / 12 mil - White on Black - 12' x 100'
  • R12WBK-24'X50' / 12 mil - White on Black - 24' x 50'
  • R12WBK-4'X200' / 12 mil - White on Black - 4' x 200'

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Customer Reviews

Average rating for Nash Distribution is 4.98 stars of 5 stars - based on 31 reviews

I use the 20 mil vapor barrier from Nash on my crawl space projects. The product is heavy duty and the service from ordering through shipping is unbeatable!!!

Eric G. - Integrity Plus Insulation - Prentice, WI 54556

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

Steven K. - Lincoln, NE 68504