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self-sealing (not comparable)

  1. A device with seals that activate without special procedures.
    The engine had self-sealing gaskets to keep the grease in, just tighten the bolts.
  2. Describing a container that is capable of automatically closing off leaks that form in it.
    One thing that saved many pilot's lives during World War II was salf-sealing gas tanks that kept their planes from becoming fireballs when riddled with bullets.