Others Applications:

the need to maintain gas-tight state of the structure, gas plug, life rafts, life-saving equipment, ship spare parts, hatch cover, pollutants in waste bags, isolation beds, gas leakage to prevent the doors, tents, hovercraft apron of the hot air balloon, a roof fan.

Stuff needs sealing

and protection: air lock

chamber, life raft, boat cap,

tent, hovermarine, bag of

pollutant etc.