Hollister Adapt flat barrier rings can be used to fill in or caulk uneven 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. Create oval and customized openings. Skin barrier rings are a great alternative to paste for less mess. Simply remove the protective backing from both sides before use. Apply ring to the back of the skin barrier. Can be stretched to different sizes and easily broken and reformed.