What function does the door seal gasket serve in a container?

The door seal gasket serves a critical function in ensuring the integrity and security of a container. It provides a waterproof seal between the doors and the door frame, which is essential for protecting the cargo inside from environmental factors such as rain, moisture, and dust. A proper seal helps to maintain the conditions within the container and prevents water from entering, which could lead to damage of the goods inside, particularly in intermodal transport where containers are often exposed to various weather conditions.

This sealing function is vital for various types of cargo that may be sensitive to humidity or contaminants, ensuring that they arrive at their destination in optimal condition. Therefore, the effectiveness of the door seal gasket directly impacts cargo safety and quality during transport.

Other options, while they may represent some features of containers, do not address the primary purpose of the door seal gasket. For instance, ventilation is not needed at the door seams, as it could introduce unwanted moisture. Aesthetic appearance is secondary to functionality, and cushioning impact is typically handled by other structural components of the container rather than door seals.