The LG MDS65210402 Dishwasher Tub Gasket's working functions center on creating a watertight seal. Its flexible rubber construction allows it to compress and conform to the contours of the dishwasher tub and door. As the door closes, the gasket presses against the tub, blocking any gaps through which water could escape. During the wash cycle, the gasket withstands varying water temperatures and pressures, maintaining its integrity to prevent leaks. This ensures that the spray arms can effectively circulate water and detergent, maximizing cleaning power within the sealed environment.