Crawl Space Encapsulation Supplies

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All of our crawl space vapor barriers and liners are authentic Crawl Space Encapsulation® products

12 Mil is a measured of thickness and used in the plastic vapor barrier industry. 12 Mil is equivalent to .012 inches.

12 Mil crawl space vapor barriers and liners are the most popular choice for crawl space encapsulation®. Both DIY and professional installers install more 12 mil vapor barrier that any other thickness. The reason 12 mil is so popular is because it offers both durability at a reasonable cost and a wide selection to meet the needs of the crawl space. Often times the home owners need some extra storage and all of our 12 mil vapor barriers offer this feature. 

Today, homeowners and professionals alike have many choices in both thickness and dimensions available to them in vapor barriers and liners for the crawl space. We offer homes with narrow pier spacing all the way up to a wide open space options to limit purchasing more vapor barrier than they need.

GuardianLiner™ & DiamondBack™ 12 Mil vapor barriers are made in America and the SilverBack® HS is made in Canada. All of our vapor barriers for crawl space encapsulation® are made to our high standards and tested by an independent lab before they are sold to you.


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12 Mil Crawl Space Vapor Barrier, GuardianLiner® crawl space vapor barrier, 12 mil vapor barrier, 12 mil crawl space vapor barrier, 12 Mil Liner
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Retail: $99.00
Price: $81.68
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Availability: In Stock
Crawl Space Repair®

    12 Mil Vapor Barrier GuardianLiner® Extremely durable, high quality crawl space vapor barrier/liner. This crawl space liner has been a favorite of the professional community since its introduction. There are three major components that make this liner an excellent choice for the crawl space environment. First, the white top layer and the tan bottom layer are made from 100% virgin polyethylene resin. This is very important because these layers will last indefinitely. Product performance &...

    12 Mil Vapor Barrier 1000 Sq Ft, DiamondBack™ 12 mil crawl space liner, 12 mil crawl space vapor barrier, 12 mil crawl space plastic, white crawl space liner, crawl space material, crawl space floor liner
    Price: $302.24
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    Crawl Space Repair® Item #: 12M-1000WB -

      12 Mil DiamondBack This American Made crawl space liner is the basic string reinforced vapor barrier that can be compared to most other brands on the open market for the same stated thickness, 12 Mil. Actual 12 mil is equal to .012", not 12mm. This crawl space liner does not contain any additives and is reinforced with a 1000 denier polyester cord to stablize the layers and prevent tearing. The appearance of this crawl space liner is bright white on the face and black on the back. Although it...

      12 Mil GuardianLiner® HS (High Strength) Vapor Barrier  crawl space vapor barrier, 12 mil vapor barrier, 12 mil crawl space vapor barrier
      Retail: $98.12
      Price: $87.70
      Availability: In Stock
      Crawl Space Repair® Item #: 12MGL- -

        NEW Product Technology The GuardianLiner® HS technology comes from 60 years of outdoor environmental strength testing and is a premium engineered vapor barrier. With 100% of the surface protected by reinforcement made from strengthened polyethylene ribbons. The puncture and tear strength greatly outmatches even our GuardianLiner® string reinforced vapor barrier product line.  The 12 Mil measures actual 12 Mil across the surface and looks great as wall or floor liner. This crawl space...

        Pure Guardian™ - Non Reinforced Crawl Space Liner crawl space liner, crawl space vapor barrier, non reinforced vapor barrier, antimicrobial
        Price: $157.70
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          Authentic Crawl Space Encapsulation® vapor barrier The ultimate crawl space liner offering both the benefits of our Pure Premium® and GuardianLiner® brands. This crawl space liner is non reinforced and comes in several thicknesses that will suit many durability requirements. The bright white face is the same 100% pure virgin polyethylene that you will find in all of our products. While the back is made from our very popular GuardianLiner® but without the reinforcement. Our New Pure...

          12 Mil DiamondBack™ Product Bundle crawl space liner, crawl space vapor barrier, crawl space plastic, white crawl space liner, crawl space material
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          Retail: $783.19
          Price: $736.20
          Availability: In Stock
          Item #: PDB-217 -

            12 Mil DiamondBack™ & InstaDry® Bundle
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            Price: $999.99
            Availability: In Stock
            Item #: 12M-1000WB-ISK -