A portable assembly for housing a toilet having an enclosure having a doorframe cutout having a first perimeter portion formed around the doorframe cutout, the first perimeter portion comprises a knife edge extending out from an outer side of the front sidewall. The portable assembly further includes a door having a second perimeter being sized and shaped to substantially correspond to a shape and a size of the doorframe cutout, a gasket fit inside of a cavity in the door, wherein the gasket comprises a divot sized and shaped to correspond a shape and a size of the knife edge to accommodate the knife edge when the door is configured in the closed position, and a lock assembly configured to engage a wedge to provide a knife-edge seal via the gasket and knife edge.