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20 mil Liner

WhiteCap Standard 20 mil reinforced plastic sheeting is ideal for dirt, gravel and concrete crawl space encapsulation jobs. WhiteCap Standard 20 mil reinforced vapor barrier can be used to cover both walls and floors. This 20 mil reinforced liner should be used for indoor applications.

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

  • WhiteCap Standard
  • WhiteCap 20 mil Standard blue vapor barrier
  • WhiteCap 20 mil Standard blue vapor barrier
  • WhiteCap 20 mil Standard blue vapor barrier

Product Overview

Plastic sheeting from a big box store is prone to failure and leaking after just a short time following installation. If this happens, your customers will not be satisfied with the job and will require additional work. Install the correct liner the first time, a WhiteCap Vapor Barrier! When you install the WhiteCap liner, you are installing one of the strongest and most durable, heavy-duty plastic liners on the market.

Key Benefits

  • Heavy Duty Multi-Ply Cord Reinforced Polyethylene
  • Bright white appearance, blue on the reverse
  • Contains Fire Rated Additives
  • Stop/reduce foul nasty odors
  • Prevent mildews, mold
  • Prevents structural rot
  • Reduces energy and HVAC cost

Product ID / Size Chart

  • WC-20 / WhiteCap - 20mil - White on Blue - 24' x 50'
  • WC20-12X100 / WhiteCap - 20mil - White on Blue - 12' x 100'

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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