Walker Barrier Systems custom designs & manufacturers Isolators, Restricted Access Barrier (RAB’s), and Downflow Booths to provide both product & personnel protection for containment, aseptic, and sterility test applications. Walker Barrier Systems also provides aftermarket support for all isolator and downflow booth needs from our New Lisbon WI facility. New in 2013 is our Mobile Clean Room (MCR). The MCR is a portable, self-contained clean room environment allowing for cGMP drug development and processing.