This is the technique I've been experimenting with for leftover glass. This was attempt #1, Elmer's glue and tile grout. You can see where it bleeds through...definitely need to seal the edges
Pin by Andrea Cordova on Craft Ideas | Mosaic flowers, Glass mosaic art, Stained glass mosaic
Case Study: Non-Sanded Grout for Mosaics with Incidental Gap | How To Mosaic Blog
easy stained glass grout|TikTok Search
How to Grout a Glass Mosaic Video - YouTube
Glass-On-Glass Mosaic Grout Color | How To Mosaic Blog