need help with window glass install

[camcojb]

How do you guys install the glass into the bottom channel? The factory glass has a rubber piece molded to fit the bottom of the glass to hold the glass in position. Of course, those are now hard as a rock and cannot be removed without destroying them.

Are these available? The local resto shop says nobody makes them, they just use silicone. My thoughts are there's no way to hold the glass in there straight like the factory rubber piece does. Do you use silicone and maybe shim the glass in place until it sets up? Or do you know where to buy those pieces?

I measured the old stuff and it appeared to be 1/16" thick, so I bought a sheet of 1/16" neoprene. But no matter how hard I tap it with a rubber mallet, and every known slippery substance used, it will NOT go all the way down in the channel, comes up about 1/4" short of the factory glass. The new glass is actually a few thou thinner, so that isn't the issue, it appears to be not having the factory rubber pieces, not being able to find them, or not being smarter than I am!!!!!!!

Jody