What is the plastic film inside the car door called?

[SanNaomi]

The plastic on the inside of the car door is called the door seal or sealing strip. Below is some relevant information: 1. Car doors require good sealing to prevent dust, water, and noise. In addition to proper size coordination between the door and the car body, another important factor is the sealing strip embedded or pasted on the door frame and door. The sealing strip is a rubber product with a hollow cross-section. Its flexibility allows it to fill gaps of varying sizes—when the gap is large, the pressure on the seal is minimal, and when the gap is small, the pressure increases. 2. Sealing is a crucial quality indicator for the entire vehicle, and the car sealing strip is one of the key components that determine this performance. It is widely used in areas such as the front and rear windshields, doors, windows, engine compartments, and trunks, filling gaps between body parts. It serves functions like shock absorption, waterproofing, dustproofing, sound insulation, and decoration, providing protection for both passengers and the vehicle.