Our Skin Barrier Arcs can be used on top or under a pouching wafer:Under the pouching system: The skin barrier arcs can be placed directly on the irritated skin around the stoma to create a smooth platform to adhere the pouch or wafer. The arcs protect the skin from trauma caused by repetitive removal of tapes and adhesives.Over the pouching system: The skin barrier arcs can be placed around the wafer to secure the edges from lifting up, creasing or loosening. Use 1-3 arcs around the edges. Skin barrier arcs provide an excellent alternative to waterproof tapes and give you a waterproof seal around the wafer when bathing, showering or swimming.These arcs are a great tape alternative and come in small and large sizes. They are water resistant with high tact, but are skin friendly. We also have Skin Barrier Sheets in the same formulation:A thin hydrocolloid sheet that protects the skin from stoma output. Highly absorbent. Cut to fit - no starter hole, non-sterile.