Hmm, I would think this is problematic based on my experience with my own son as a baby. After he was circumcised, we were instructed to apply petroleum jelly for several days while he healed. I remember that his diaper would leak constantly because the jelly would repel the urine and shoot it right out the sides of the diaper. I’d guess for an adult it would depend on where and how it was applied, just something to watch out for.