20 Mil GuardianLiner™ SR

20 Mil Crawl Space Vapor Barrier

The GuardianLiner™ 20 Mil crawl space vapor barrier is designed, engineered and made in the USA. This 20 Mil crawl space vapor barrier measures 20 mil at the top of the cord and 16 mil at the plastic. 

The top is pure white and made with 100% virgin polyethylene resin, while the bottom layer is tan in color and has an added antimicrobial that enhances its natural ability to resist mold and mildew growth. This vapor barrier is reinforced with 1000 denier polyester cord to prevent any holes from getting larger than a dime. The layers are fused together with more molten virgin polyethylene, this vapor barrier is not glued together like some offered in the market.

We back our quality with a 30 year replacement product warranty against manufacture defects and/or de-lamination of the layers.  Like all of our crawl space vapor barriers, the GuardianLiner 20 Mil is tested in an independent lab for foreign sources of VOC's and odors before we offer them for sale. CrawlSpaceRepair.com® is the ONLY manufacture that tests its vapor barrier products before they are sold to the public.