A door seal strip, also known as a weatherstrip, is a flexible material that is placed around the edges of car doors, windows, and trunks. These strips are designed to fill the gaps between the door and the car body, preventing water, dust, noise, and airflow from entering the vehicle. Made from materials such as rubber, foam, or silicone, door seal strips are engineered to withstand various weather conditions, ensuring longevity and durability.