Answer: superglue

AnswerCrossword Clue
SUPERGLUEElmer's rival
SUPERGLUEResult of trying to invent a gun sight
SUPERGLUEWhat never lets go?
SUPERGLUEPowerful adhesive
SUPERGLUEStuff used in some nasty pranks
superglueA very strong quick-setting adhesive, based on cyanoacrylates or similar polymers
superglueto glue with a powerful adhesive