[sc2dave]

Mine had silicone, but I know it was messed with. how did they come stock?

 

[67 Nova Boy]

Black silicone for the rear windshield, then clips for the s/s moldings...I think.

Dave
67 Nova Boy

 

[SouthBay2s]

Yes, no rubber seal for the rear coupe window starting in '66. GM went to window ribbon seal like on other models. Something like this, though there are other products you can use https://www.3m.com/3M/en_US/company...nd-Ribbon-Sealer/?N=5002385+3293242376&rt=rud

 

[Rick_L]

Original Is not silicone, it's butyl rubber. I'd stick with that.

 

[sc2dave]

Any name brand Butyl rubber will do?