Google is no help.
It flows on like nail polish, clear and glossy, smells faintly of fruit (esters?), has water cleanup, and–here’s the important thing–it goes on clear and it dries clear. The little bottles of acrylic craft paint that you get at Wal-Mart or Hobby Lobby (such as FolkArt ® or Apple Barrel ® go on opaque, and dry opaque, thus rendering your suncatcher useless.
The only place I’ve found the authentic clear suncatcher paint is in those exorbitantly expensive suncatcher kits, in the teeny-weeny Barbie-doll-sized pots, and since I’m in charge of church crafts for 60 kids for the coming year, I need this paint in at least 2 oz. bottles; I can’t afford to buy even a $1 Dollar Tree suncatcher kit for each kid every time we wanna paint suncatchers.
…if the Dollar Tree happened to have 60 sacred-themed (or at least “general”) suncatcher kits fall off the truck, which they never do. It’s always Shrek, or Disney.
So, what IS that stuff? I need some.
ETA: I’m assuming that it’s acrylic paint because it’s water-soluble, and it’s non-toxic, and it’s (relatively) cheap. I’m not aware of any other kind of paint currently available at the mass-market Dollar Tree that fills all those requirements.