[ray_mcavoy]

Hi C15_Sierra,

I believe what you're looking for is called "glass setting tape". It's basically just a thin strip of rubber that you lay over the open side of the channel and it wraps itself around the edge of the glass as the glass is pushed into the channel. Then you just trim off the excess that's sticking out. Note that the glass setting tape comes in different thicknesses for various channel widths and glass thicknesses.

If you can't find glass setting tape, the black urethane adhesive that's commonly used to install windshields in newer vehicles should do the trick too.