The ZipWall ZDC ZipDoor Commercial doorway dust containment kit is a great way to create a dust barrier when all you need to seal is the doorway. Installs in under a minute and is ideal for commercial renovations, hotels and hospitals. Will increase profitability on every job by dramatically cutting labor costs. Designed for commercial doors up to 4' x 8'. Italso makes it easy to meet the EPA's RRP requirement for a covered doorway. To attach the ZipDoor, ZipWall invented a very special double-sided tape. One side of the ZipWall tape is gentle on painted surfaces like traditional painter's tape. The other side was designed to hold plastic sheeting and lets you reposition the ZipDoor for up to an hour before fully bonding to the plastic. Made from4 mil flame-retardant plastic sheeting, the ZipDoor kit has two heavy-duty zippers pre-installed to allow easy access through the doorway. The zippers are glued-on for maximum strength and durability. A stitched-on zipper can fail if pulled sharply or tugged because the stitching creates a perforation. Barrier system sets up in minutes and adds a professional touch to the job site. No tape, no ladders, no damage. Use in commercial and residential remodeling settings, as well as in flood restoration, mold remediation and many other applications.