Provides a tight seal between your steel garage door and concrete floor with the Clopay Garage Door replacement bottom weatherseal kit. This easy to install kit helps keep out items such as water, dirt, insects and pests from entering your garage. The flexible rubber even conforms to uneven floors to create that tight seal.. Provides a tight seal for your garage door. Easy to cut to the desired length with a utility knife. Grooved to prevent freezing to the floor. Garage Door Part/Accessory Type: Garage Door Seal. Garage Door Seal Type: Garage Door Bottom Seal. Product Length (ft.): 18 ft. Product Width (in.): 3.5 in