Door Skin Attach to Centre Spar

[RestoZ]

Hi Guys have been through the threads on door skin replacement but cant see where mention is made of any attachment to the horizontal centre spar which runs across the middle of the door frame. I'm stripping my doors (and the rest of the car) and my skins seem a bit floppy, but if I push them back to the spar they seem quite rigid. Should they be attached to the spar and if so what is the best product to use to do that? Car is a 77 260z 2+2.  Thanks Paul

[AndBir]

When looking at mine there seemed to be some degraded rubber type material on the top edge of the horizontal spar where it meets the door skin.

Maybe a bead of seam sealer or a strip of closed cell foam would be a suitable replacement?

Edited May 26, 2020 by AndBir
added photo and text

[RestoZ]

Thanks, appreciate the response. I suspect over the years the two have parted company on both doors so will have to address. I have been raiding the local panel beater's dump bin which is full of old doors and I see on modern cars they put big blobs of a sticky glue which sets but is still pliable so will see if I can find out what that is and post it back on here. Thanks again. 

[AndBir]

I think you are probably referring to a type of non-hardening butyl mastic sealant.

[gilltech]

Ditto what AndBir says, my 260 is the same in the doors as his photo - a bitumastic impregnated foam strip which provides both adhesion and also a little spongy 'give'.

If you do decide to insert a new foam strip make sure you use a genuine closed cell type butyl rubber. Some of the supposedly closed cell strips on the market for draught sealing in houses etc are not 100% closed cell at all. The last thing you want is water uptake in there. 

But if it were me I'd look at using a bitumastic sealant of some kind, position and hold the door skin where you want it and use the sealant as an adhesive.

[AndBir]

You could also try this  seal "tape" similar to that used to attach the plastic sheet behind the door cards.