Glue
I use Weldbond. Is a white (latex based?) glue.
Very resilient, looses a lot of volume when dry, it dries transparent...
DO not use to laminate balsa pieces, it will warp them if you don't
hold them until dry. It takes 24 hours to fully dry but... if you spread it with your finger ig gets tacky very fast and holds onto the piece.
For fuselages I usually tack glue with CA and then complete the job with Weldbond.
Albert