What is the rubber on the airplane?

The rubber on an airplane typically refers to the seals and gaskets used in various components, such as doors, Windows, and fuel systems, to ensure airtight and watertight integrity. Additionally, rubber is used in tires, which provide traction and shock absorption during takeoff and landing. It may also be found in vibration dampers and other parts to reduce noise and wear. Overall, rubber plays a crucial role in maintaining the safety and performance of an aircraft.