1.5"X50' WALL ATTACHMENT TAPE. This will attach to virtually any foundation surface, much like the wall curtain, but allows you to use any wall material. We have matched our 10mil and our 14mil vapor barriers to work well with this system, but it will work with most vapor barrier products. Wall curtain is faster, but this system works great for situations where you must use other wall vapor barriers. Again, a patented, NO MECHANICAL FASTENERS way to permanently attach wall liners.