Sure. I used Norland NOA61 optical adhesive.Super glue can work, but won't give you maximum optical pass-through (and it can cloud up over time).The NOA61 is used in professional optical applications. Typically tritium vials are added by gluing into slots. So in this case, the vials would just drop right through. I had to tape up one end, add NOA61, then submerge the vials. You need UV or direct sunlight to cure it.