The YCS Crawl Curtain is the smartest and easiest way to properly seal foundation walls and piers. The wall and pier curtain liners are pre-rolled to fit the job, speeding up the install process. The built-in activation strip and the YCS adhesive will permanently seal to virtually any foundation, brick, block, or field stone dirty or wet with NO mechanical fasteners. The liner is bright white on the front and blue on the back, so that the activation strip is easily identified. Additionally, each roll is individually wrapped to ensure the roll stays clean while transporting the rolls through the crawlspace. Never again worry about damaging your foundation wall with nails and pins. The crawl curtain is the most efficient and fastest way to attach and seal a crawl space. Safe, simple, sealed, in half the time. Please see our videos. *Pre-rolled for your convenience to protect the liner from dust, dirt or moisture to ensure better tape seams, all while saving labor time and wasted material. For higher foundation walls consider using YCS Wall Attachment Tape.