As a very long time, 24/7, documented, U-IC, I have always discussed by urinary requirements with the HR manager of the organizations I have worked for. First for the simple honesty of my needs and as a result of working for International organizations of size, as differences between Countries and effecting laws are real. Because I am very good at what I do and I do not make a big deal about it, I have been rapidly promoted.
If you're just putting in time, doing only what is needed, you will be replaced at some point as most organizations are looking for individuals they can grow with and rely on. Diapers to not represent special requirements and present no cost to employ.
Lots of opinions above! Being honest with your employer and doing more that what is expected, plus, will make your want or need to wear a diaper a non-issue!