You can usually find the types of door weather stripping shown here at well stocked hardware stores and home centers.
How to install weather stripping around garage door.
With the garage door unplugged and clamped in the open position measure the width of the opening at the top of the opening where the door seal will be nailed.
Getting the top piece cut to the proper length is the greatest challenge in this easy to do project.
This flexible weather seal limits air flow into the garage resulting in a more comfortable environment when your garage door is closed and helping keep dust and debris outside the garage.
How to install garage door weather stripping.
In this episode dave mars shows how to better insulate your garage door to help save energy and money.