Everyone on this site has such wonderful suggestions, but ultimately, what they all say is correct..it is all trial and error in the beginning...I was sent home with two weeks of supplies and have already just about went through them all due to leakage...depending upon samples now and whatever is brought by home health care...I have tried paste, no paste, barrier ring, no barrier ring, and to no avail. My stoma shrinked 2/8 of an inch in one day, so I am sure that has a lot to do with it....I know it takes time and the frustration has really set in....home health care nurse was by last night and tried again...made it through until 6 this morning and then the leaking started...waiting to hear again.