you should be able to get various thickness glass setting tape from a local auto glass shop .... or you could use black silicone, which works fine, lightly fill the metal channel, push the glass into it, trim the ooze after it's set up well

Bill


Moved over to the Passing Lane

"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir
"When we tug a single thing on an old truck, we find it falls off" ~ me
Some TF series details & TF heater pics