The predicament that presented itself to Pedro is how do you secure drywall joint pieces to prevent them from flopping (depress easily in & out with a slight pressure of a finger or hand) if there isn't any studs you can secure them to. Especially if 2 sheetrock pieces meet at a seam in the absence...

X-LINE act like any caulk, filler material. Its waterproof a sealant for damaged surfaces.