Install the new seal with the larger sloped edge to the outside of the garage door and the flat part against the bottom of the door.
How to install bottom garage door seal on metal door.
In this video we add a new aluminium retainer and new rubber seal.
If you have a wooden garage door rip off the nailed rubber seal.
Thread the t shaped edges into the weather seal track then slide the seal across the door.
Clean the door bottom photo 2 then cut the new rubber seal to length with a razor knife.
Tips on replacing your garage door bottom seal.
Be patient it takes a lot of pushing and pulling even with a helper.
He also gives a brief description.