e36 saloon - L shaped rubber seals

I simply pulled the old ones off the glass edge; then i really cleaned out all the gunk caught underneath. I started by putting the new one on at the top middle of the screen. It presses onto the edge of the glass. I slowly worked out evenly to the corners, made sure the top edge was even and straight then started working down each side. Done

 

I'd exercise caution here, I fit screens for a living and not every car will be as easy as described by llatsni. If the screen was replaced at some stage in the past,  you could find that the moulding is  bonded in with the screen, this could be deliberate or just where some excess polyurethane is catching the moulding ( this is also possible on some factory fitted screens ), if this is the case, removing the moulding could be very difficult, not possible without the use of tools and could result in breaking the screen. It is also possible that you could successfully remove the old moulding but have  a lot of difficulty in fitting the new one without removing the screen.   

  

HI chaps. managed to do mine the same way. was v. careful. no leaks as we have had some rain and poured bottle of water over the rear.