20 Mil Crawl Space Vapor Barrier, SilverBack™ by CrawlSpaceRepair.com | Sunday, January 31, 2016 | 20 Mil SilverBack™ SilverBack™ is among the highest rated and highest reviewed crawl space vapor barriers in the industry. Super strong and reinforced with a polyester... Crawl Space Vapor Barrier. 20 Mil crawl space vapor barrier20 mil liner20 mil barrier20 mil vapor barrier20 mil SilverBack Read More