If you could only used one sealant.........What would it be?

I notice a lot of your yard art crafts say sealed with acrylic. Does that generally mean most of you are sealing with Acrylic spray?

I'm interested in doing a little of everything...grouted bowling balls, leaf casts, spraying hammered metal paint on old yard statues.....Do ya'll use lots of different kinds of acrylic coats or just one primarily for everything? I would be interested in using one that would do it all. Thanks, Karen ☺