Originally Posted by KennewickMan
I believe I have an early 67, because I have the type 2 glass bar. There's barely room for the glass, much less any magic tape. There are grooves inside the bar which hold the silicone....I can't see them serving any purpose with tape.
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I suspect you see no purpose because you did it differently and want to make it "okay". You started this thread because your curved window is not sealing correctly. Maybe all the installation steps should be considered as suspect.
The bar you describe as type 2 spreads very far and could actually accept glass much thicker than the original or the replacement. Once you use carpet tape in this application you will fully understand why it is used. Many use other things thinking they were doing the right thing. I recently replaced a window because the butyl tape the PO used, got hot and the window slid right out of the grooved bars. I would strongly discourage you from using silicon of any type, even the new aluminum safe kind. It sticks fast when you want it off and where ever you want it to hold tight, it always fails.