The property of swelling also makes sodium bentonite useful as a sealant, since it provides a self-sealing, low permeability barrier.
en.wikipedia.org Cable glands and self-sealing grommets are usually designed for entering single or just a few cables.
en.wikipedia.org The ejection seats were armored, the cockpit was lined with nylon flak curtains, and foam-filled self-sealing fuel tanks were installed.
en.wikipedia.org Though these may be considered the most significant, many other items were also transported, including designs for rockets, superchargers, gyroscopic gunsights, submarine detection devices, self-sealing fuel tanks and plastic explosives.
en.wikipedia.org Features include the capability to withstand military-grade small arms fire and certain explosive devices, a self-sealing fuel tank, and an alarm system.
en.wikipedia.org