AE86 Rear Side Window Removal/Reinstall???

[juantonwan]

aussiefan Wrote:download the pdf from here and you'll find all the information you need
http://files.aeu86.org/manuals/AE86Manual.pdf ~100MB

actually it's very easy
the toughest part is to carefully remove the window trim with a scraper, a small chisel or a screwdriver
then unmount the moulding clips
cut loose the adhesive
and that's basically it

What sort of product should I used to seal the window? Or do I need to buy a window gasket?