An exterior door frame seal, commonly referred to as weatherstripping, is a material applied around the edges of a door frame to prevent air and water from entering or escaping the home. These seals come in various materials, including foam, rubber, vinyl, and metal, each designed to suit different types of doors and climates. The primary purpose of these seals is to ensure that doors fit snugly within their frames, minimizing gaps that could lead to drafts or water intrusion.