Adhesive suggestions for pebbles and shells on cardboard I'm looking to suggestions on what glue would be best to stick smooth stones and shells to a reasonably sturdy piece pf cardboard to be put upright in a shadow box/deep frame. Would epoxy be the best way to go? I'll need something pretty strong as I certainly don't want any to fall ofd! I'd really appreciate any information anyone may have. Thank you
I would think that some standard silicone would be strong and cheap. They are all guaranteed to stick to cement, bricks... And pebbles and shells are made of similar materials.

Of course, you need to clean the pebbles and shells properly, before applying any glue.