Alternatives to acrylic sealer for preserving dried vegetation in the outdoors?

I've come to find out that this stuff doesn't degrade very well. Is there another type of spray on sealer I can use that's more environmentally friendly? I'm spraying leaves and sprigs of different types of vegetation that end up going into a grapevine wreath, meant to display outdoors (covered from rain). Wreath is only meant to last throughout the season.

Also, I got some general purpose clear gorilla glue to help keep the vegetation in the crevices of the wreath. It takes forever to dry and I don't think it works to well. Any recommendations for the right type of glue to be using? Any environmentally friendly options?