Sealing Issue - Leaking - Rear Door Window Edge

[odium]

Hi,

I have replaced the weatherstripping on my car, a 1987 t-top, but I now get leaking at the back edge of the window. I can place a paper towel in between the window and weatherstripping (it is somewhat tight but very easy to move up and down along the edge) and it has been confirmed that this is where the water is coming from.

I have done the following:
1) Adjusted the window so it is angled back very tightly in to the front section and t-top weatherstripping.
2) Adjusted door strike backwards to where door is sub-flush slightly at rear edge.

The car does not leak around the t-top any more, so that is great, however, water will leak in through the rear edge of the door's windows on both driver and passenger side.

Has anybody experienced this issue before? What could I have done wrong? The weaterstrip is seatted great and the edge is installed so the t-top and it line up great. There is just this very fine gap that is letting water in... Very frustrating situation to have up here in the PNW.

 

[odium]

I added material in some key areas using 3M strip-calk.

Hopefully the material doesn't stick and move around in the window area too much. I am going to do some research to see if there is a way to cure the outside of the polybutylene so it doesn't stick as much.

Much quieter ride and no water inside after a wash so far. The strip-calk isn't too noticeable either.

 

[odium]

3M strip-calk was a mistake. I've decided that the strip-calk is more of a half-fix for stopping leaks. The temperatures got to about 70 degrees the other day and the calk ended up being way too pliable. Fortunately, the strip-calk is very easy to remove.

I used black silicon RTV sealant in between the body and seal and all leaks in the front corners and back inside stopped. I also readjusted the windows and added RTV in the upper rear corner of` the windows on the outside of the seals. I smoothed it out to look at least somewhat presentable and then put a Ziploc plastic bag over the area before shutting the door so the windows wouldn't stick to the RTV. After these areas dried, the RTV dried to the shape of the window and all seems to be good. This fixed the leaks coming in through this area down the interior b-pillar.

EDIT: It would be helpful to add that I purchased a GM OEM seal kit. These seals neck down in the corner areas where any plastic components have been molded in. IMO this is a bad design that needs to be fixed w/ the RTV and Ziploc method described above. If you get these seals you will see What I am talking about. Anywhere the material changes thickness ends up being an obvious leak path.

Use a healthy amount of RTV between the seal and body and your leaks will stop. Hopefully this post helps others w/ their t-top sealing headaches. The t-top cars are worth it when it's a hot summer day. The flex helps w/ 60' times too!