Prep Multi-Use Adheisve 250ml bottle
This is one of my favourite glues, especially for glass on glass or assemblage. It is easy to use, dries clear and is very strong. Its so good in fact that I keep it under my pillow (haha). Seriously though, you will be hooked. It doesn't have a nasty smell, grips well and solves a lot of your tricky little mosaic problems. It's great to have a bottle in your mosaic kit for those fiddly little additions, or you can use it for all your glue and grout mosaic projects, and projects where you place all your pieces very close together and don't need grout.
Team it with a bottle of my magic mosaic cleaner to remove any residue you get on the surface.