Adapt Barrier Rings. Adapt Flat Barrier Rings can be used to fill in or caulk uneven skin contours near the stoma to create a flatter surface and help prevent ostomy drainage from getting under the ostomy barrier. They may be cut, stretched, or stacked together to help improve the fit of a pouching system. Features: Flextend M skin barrier formulation, Convenient individual recyclable clamshell package, Not made with natural rubber latex.