Has anyone ever cut out a section of their trailer's under belly to gain access to plumbing, etc.? If so, how did you reattach it? The covering on my trailer is a sheet of flexible rubber.
I've seen corrugated plastic & my current one has a woven membrane, but I've never seen a rubber cover, so I can't comment on that. Black Gorrilla tape works very well on the plastic & fabric covers. I have some on that has lasted for years & still is firmly attached.
I would stay away from just about any of the grey duct tapes cause they just fall apart after a few months.