People often want to seal their final work and take it to their friends' homes. But the beads on the Diamond Painting may come off. So the easiest way is to seal the Diamond Painting by using some glues.
Available glues are PVA glue, mod podge, Tombow glue, etc. But you may not know how they work and if they are good or not. Some of them may turn yellow after a long time. That will destroy your work.
We strongly recommend you to watch this youtube video by Sam. It the thoughtful and detail. She will take you into the tour of how to seal the diamond painting and what effect it will be.
However, the PVA glue is not tested :(