Self-sealing

Full definition of self-sealing

Adjective

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.