Sealant question

[gecheesoul.livejournal.com]

I'm trying to make napkin rings. They are for a kitchen with a beach theme. I'm attaching seashells, and the such, on part of the ring. On the other parts I'd like to attach sand. I was wondering, if you ladies knew of a sealant that would allow me to do this without the sand ending up everywhere but on the napkin ring? Any suggestions would be appreciated. Thanks in advance.