Looks kind of like this. They suggest replacing the uchannel with clamping braces instead

youtu.be/t7Pmd_Vx5FA

If it were me, I’d fix it the lazy man’s way - clean out the slot and the glass very well. I’d then dry it out with rubbing alcohol and paper towels.

Then I’d squirt some Goop adhesive in there, and push it back in place (also consider clear silicone). I like Goop because it sticks to almost everything, cures quickly, holds incredibly well, yet is easy to cleanup (or remove when you need to).

You want enough adhesive in there so just a little oozes out, to ensure it’s made good contact.

Use a knife to score the existing silicone and then pull the glass out. Use a razor blade and knife to clean up the existing silicone. Clean the surfaces well.

Get silicone bathroom caulk from home depot. Put some in the channel, put the glass back, put more along the seam. Use a wet finger to smooth it out.

Tape it in place while it cures and you’re done.

Largely agree with the others with one exception. Don’t put adhesive inside the channel. It will make future removal basically impossible.

Cut whatever adhesive you can see with a razor, slide the glass out of the channel, clean the channel and glass well, and then reinstall. Run a bead of silicone around the seam. It will be more than enough to hold the glass in place. That’s the same way stone countertops are installed - there usually isn’t glue between the countertop and the cabinets. The silicone/caulk beads are enough to hold it in place.

Things to keep in mind:

• it’s glass, so you’ll want to avoid bumping it into things. Put down thick towels/blankets in your work area and wherever you want to put it down. Be very wary of dinging the bottom on the floor/ceiling
• wear PPE. At a minimum leather shoes/boots, thicker pants that aren’t skin tight (no skinny jeans), long/heavy/baggy sleeves, leather work gloves, and safety glasses
• it’s going to be somewhat heavy. You could measure the panel size and plug it into an online calculator for a decent number. I suggest buying heavy duty suction cups that come with vacuum pumps. These will make moving the glass around a lot easier and they’re not that expensive

Good luck!

I think you need to do something more to keep the panel from pulling out of its channel again. You should do what others have said, remove the door, pull the panel out, clean out all the old adhesive and caulk, and replace the panel, but you should also add something to keep the panel from leaning down away from the wall again.

A simple fix would be to screw something like this bumper into the ceiling at the end of the top channel, right at the corner of the panel so that it can’t slip out. If the ceiling is just sheet rock there then use an anchor as well.

This might not be the prettiest fix, but because the door is hanging off this panel you shouldn’t trust it to hold with adhesive only, and definitely not just silicone caulk (which is not an adhesive). Moving the door will flex the adhesive and eventually work it free again.