I use cheap superglue when I am working on my wall climbing plants.
A careful application of it, as you dont need a lot and it spreads naturally quite well, as you are applying it to a 'sponge' if it is clump foilage you are using it on.
This has been stuck down first with PVA and, once that has dried, been given a dose of superglue.
Given a light drybrushing as well afterwards, as the superglue has hardened the foilage and make drybrushing viable.
Not sure if you are thinking of using it on a large area, as it could be very expensive if you are ....