i would like to make a mosaic on an old window with stained glass pieces. What do i use as an adhesive and do i need to grout it?
You can use silicone, dap silicone (goes on white cures clear)
or mac glue. silicone is a little cloudy when it cures. also Lexel-a crystal clear silicone. If you place you pieces close enough you dont need to grout-totally up to you
I used GE Silicone II Clear, the one for doors and windows, just make sure it's clear.