Glad I found this thread! I have a “home made” solution. I use a sandwich bag cut to about 3" X 7". I then line it with Johnson & Johnson water proof tape. I overlap each section of tape and use about three strips of tape on all sides but the bottom. On the bottom I use a couple of strips. I do not take direct shower hits with this and bend over when washing my hair to be sure the water does not roll down my chest. Occasionally it will leak but usually no further than the tape on the catheter patch. The actual pad has gotten damp a couple of times in 6 months. When that happens I use a hair dryer with no heat to quickly dry out the area. I also do this immediately before heading to the dialysis clinic where my catheter patch is changed with each treatment – just in case.
It works. If anyone want me to post a picture just let me know. I’ll be happy to do so.