zip rail zip wall dust tight sealZipWall’s new ZipRail dual-seal accessory can be set up in just seconds – without tape or ladders – to create a dust-tight seal at floors and ceilings. Just how does it work? ZipRail is placed on the plastic at the floor and then raised and twist-locked into position, as the pole’s internal spring loading pushes the crossbars against the plastic at the floor and the ceiling. To achieve maximum dust containment, the company recommends using ZipRail with the ZipWall barrier system.