With the old CE2 sleeves...I found that if I took them apart, upon putting them back together they could develop leaks.
My easy solution was to grab a roll of teflon tape (plumbers use this to seal the
threads on water pipes) from the tool box...give it a couple of wraps to make a gasket in there, put it back together, and no more leaks. After a few trys I found ways to do it where the likelyhood of the stuff coming in contact with much if any
juice would be slim to none...plus, the stuff is used with water pipes and in sensitive distilling machines and such every day out in the real world...has no taste, and should be plenty safe for a PV seal. This tactic also allowed me to milk a little more life out of clearo sleeves that develop cracks at the ends.
The Teflon tape will turn pretty close to clear once it's good and wet and seals it off good. It'll also compress into a very small space without 'tearing'...especially when wet.
I don't anticipate having to take a Vortex apart...it'll be rare if I do

A roll of plumber's teflon tape makes a great seal if I do...