What is the black plastic on the car door frame?
2 Answers
Car door frame black plastic is called door seal strip. Introduction to door seal strip: The door seal strip is a product that seals the car door, making it harder to open, and serves functions such as shock absorption, waterproofing, sound insulation, heat insulation, dust prevention, and fixation. Functions of door seal strip: The door seal strip (auto-door-rubber-seal-strip) is mainly used for fixing the door, dust prevention, and sealing. It is mainly composed of materials with good elasticity, compression resistance, aging resistance, ozone resistance, and chemical resistance. It contains unique metal clamps and tongue buckles, making it sturdy and durable, and easy to install. It is mainly applied to car door frames, side windows, front and rear windshields, engine hoods, and trunk lids, serving functions such as waterproofing, dust prevention, sound insulation, temperature insulation, shock absorption, and decoration.
The black plastic strip around the door frame is actually called the door seal, primarily designed to prevent rainwater and dust from entering the car. I always make sure to check for cracks when washing my car, as any cracks can lead to water leakage. It's mostly made of rubber or PVC, so it's important to avoid prolonged exposure to sunlight, as it can harden and crack with age. A good seal can also reduce wind noise. During my last maintenance visit, the technician recommended applying rubber protectant every quarter to extend its lifespan. Don't wait too long to replace it—my neighbor delayed it, and the interior door components ended up rusting. When choosing replacement parts, always opt for OEM or reputable brands to ensure proper fit and avoid air leaks.
