The Crawl Curtain is 9 mils thick, flexible enough to follow the contours and irregularities of a foundation wall, but strong enough to last the life of the home. The Crawl Curtain is a polyethylene coated polypropylene and polyester fabric. It is a true Class I vapor barrier.The Crawl Curtain is installed using a low VOC adhesive so it is safe for installation contractors, homeowners, and their families. Since the adhesive is low VOC, it only off-gasses only harmless CO2.
Since no additional mechanical fasteners are necessary, it will not damage the foundation wall. And since water is a catalyst for polyurethane to cure, it will adhere to any foundation wall, even a water saturated wall. It is the ideal adhesive for a potentially damp crawlspace. And the bond is so strong it will support the weight of a concrete block!