whats the best way to reglue record covers

I use my kid's school glue sticks. They work very well.

I have used glue sticks with good results as well. No mess, put tht glue right where you want it.

When I ran my used LP store I invested in a double sided adhesive tape gun, not sure if they are still available. It would be the same thickness tape as the inside lip of most LPs(especially European covers)except the hard cardboarded original 60-70's LPs from the US. I found this to be the best method no mess with glues etc and least impact on the covers themselves.
Roman

I use contact adhesive like uhu or evostik.

Hi,
I have glued 100s of these and use Pattex contact glue (sparingly!). Hot melt is more tricky to keep thin and not squeeze out and then in need of trimming etc.

Since usually one side has a foil lining I find contact glue is the best solution --- just DO NOT put the record back in immediately to prevent the vinyl getting in touch with any out-gassing of the glue's solvent (vinyl does NOT like to get 'gassed’ with thinners :-) I speak from bad experience.
Greetings,
Axel