Hi, I've been using the moldable Convatec / Convex for a long time. But my has dips, and my stoma contracts, and pulls in, and under, below flush with the skin. (It's 55 years old.... not me... I'm 70) and I was told to avoid surgery for as long as possible. So I've learned to "play around with supplies". I find that weather often determines the seal on the moldable wafer. It needs time to "set", so I'm careful not to bend or sit... right after changing. That never used to be an issue.... but it is now. I also use Eakin seal (thin/ or reg) and cut it in half so it fills in the dip in my belly below the stoma. Sometimes, I get a week of wear, including showers and going in the pool, and other times, it leaks in a few hours. It also has a lot to do with the consistency of the output (when I first change). Thin and watery is often more acidic, and it sometimes smells like "bile". That's a clue that 1) I'm dehydrated 2) I'll probably have a leak. So remember to drink a lot of water...... It's really important, especially when you don't have a large intestine. As frustrating as it is.... trial and error is still the way to go... until you find what works for you. Marsha