What do you put on top of glitter to make it stay?

Apply a top layer of Mod Podge to seal in the glitter.

You could also use watered down school glue to create an opaque sealant for your crafting project. The top layer of Mod Podge acts as a sealant and will prevent the glitter from flaking away.

Can you use Mod Podge as a top coat? Can you use Mod Podge as a top coat? This handy tool can be used to both apply paper to the surface as well as to topcoat or seal the finish over the decoupaged surface ....
How do you sprinkle glitter evenly? How do you sprinkle glitter evenly?...
Which Mod Podge is best for glitter? Which Mod Podge is best for glitter? really whatever you like! This is the Mod Podge Dishwasher Safe Gloss medium, and it can easily turn your projects into waterproof, dishwasher safe dishes. If you want to Mod Podge on glass, using Dishwasher Safe with glitter is a great way to...
Can you put glitter in Mod Podge? Can you put glitter in Mod Podge?...
Can I use hairspray to seal glitter on glass? Can I use hairspray to seal glitter on glass? Lay it on a clean surface and spray a layer of hairspray on the glitter that you wish to seal. You should hold the hairspray can at a distance of ten inches away from the fabric to get the best coverage....
How long does Mod Podge take to dry with glitter? How long does Mod Podge take to dry with glitter? The dry time between applications of Mod Podge Mega Glitter is approximately 20–30 minutes, depending upon the thickness of application and the humidity level of the room. Be sure the previous application is thoroughly dry prior to applying the next....