What is the largest diameter adhesive lined heat shrink that you know of?
I have a vague recollection that it can be very large.
By large I mean ~36" which shrinks to ~12" diameter.
I have a vague memory that in some countries, underground splices for power distribution are done inside a junction box like contraption.
The junction box is a hard shell filled with a gel.
Then the hard shell and a margin of cable is covered with a giant bit of adhesive lined heat shrink tube.