This type of barrier seals the gap between a garage door and its frame, preventing the intrusion of elements like water, air, and pests. Typically made from a flexible polyvinyl chloride (PVC) material, it forms a tight seal when the door closes. Different profiles, such as bulb shapes, fins, or beaded designs, accommodate various door and frame styles.
Effective sealing contributes significantly to energy efficiency by minimizing drafts and heat loss. It also protects stored items from damage due to moisture and temperature fluctuations. Furthermore, it reduces noise transfer, creating a quieter indoor environment. While various materials have been used historically for this purpose (felt, rubber), PVC offers a balance of durability, flexibility, and cost-effectiveness, making it a popular contemporary choice.