My wafer has a two part adhesive ring round it. The inner area is thicker and that's the bit you cut out the stoma hole from, the outer bit is thinner like mefix tape. I always lie down to change my bag/wafer and only peel off the inner adhesive cover first, stick this down around stoma and press down to ensure good seal. Once that done I then peel backing off the outer ring half a side at a time and press it down as I go to ensure no wrinkles.
Crohn's dx 1989, loop ileo 1992, end ileo 1992. Arthritis developed 1990 Stoma abcess 1995. Azathioprine started 1995. Panprocolorectomy 1999. Stillbirth 2000, antiphospholipid syndrome dx 2000. Flare up 2004, stoma abcess and strictoplasty 2004. Low blood pressure dx with impaired kidney function 2006, fludrocortisone pres. flare up 2010, steroids, Humira, codeine.