self-sealing

adjective

1. 1

   Describing 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. 2

   Describing a container that is capable of automatically closing off leaks that form in it.

   “Many pilots' lives were saved during World War II by salf-sealing gas tanks that kept their planes from becoming fireballs when riddled with bullets.”