Now I would say leave the OUTER edge of the plastic-strip bare of rubber (if you had to remove the old remains. It looks good and there is not really a functional reason for this OUTER lip. If you like an extra challenge, you may do what I did: Cut for each side a length of 6mm wide (12mm at the bottom) rubber strips (I have a roll of 1mm rubber) and fix it to the plastic strip with black silicone (unless you have a better idea. This is very laborious and I would not re-do those OUTER lips again