The Whirlpool 2159061 Door Gasket White for Refrigerator is a replacement seal designed to maintain an airtight closure between the refrigerator door and cabinet. It works by lining the door edge with a flexible magnetic strip that presses firmly against the frame when closed, preventing cold air from escaping and warm air from entering. This tight seal helps maintain consistent internal temperatures and supports efficient cooling performance. By replacing a worn or damaged gasket, it can reduce energy loss and improve overall appliance efficiency. It also helps protect stored food by maintaining proper conditions, making it a practical solution for routine maintenance and reliable refrigerator operation.