a) If you must send the airplane before the sealant is fully cured, install Scotch 425
Aluminum Foil Tape, G00291 on the top of the sealant.
Straight from the 737NG manual for the No. 1 window replacement. You'll notice in the reports that the tape was to protect the seal.
Former pilot John Guntrip said: "This could have been disastrous, the pilot could have been sucked out mid-air if the window had come off."
Actually John it could have possibly have got a little bit noisy, and messy maybe if the sealant wasn't fully cured. Hardly say disastrous.