When waxing the prototypes I purchased bottle sealing wax at beer/winemaking supply places. It's a specific type of wax that doesn't get brittle when it dries.
You could do a resin, but wax is hard enough to peel off, so I'd advise against it.
One thing i'd do if I were still wax sealing is put a little string around the bottle where the neck met the cap so one could pull it & slice through the seal.
Makers uses a plastic. That' be super toxic to mess with at home - I'm sure they have a massive machine.
Good luck!