>>16023
There are a few options:
>Add just enough oils to make popcorn sticky
I assume they are out of the picture, since you do not want to add butter. Usually it does not take much oil, tablespoon or two per 2 liter bowl of popcorn.
>Spray on spices
They are just spices in a form of a spray. Most commonly they are spice oils or spices suspended in alcohol.
>Salt and whatever other spices you like, ground into a very fine powder
Grocery stores in the U.S. carry popcorn salt and spice mixes. They are all very fine powders and stick to popcorn pretty well without the need for any fats or liquids. Not sure if they have them in Germany, but you could probably get similar results by grinding coarse salt in a specialized spice grinder - preferably electric one since they generally can produce the finest powders. In case they are not easily available in Germany, coffee grinder, blender, or enough time with mortar and pestle should do the trick as well. You want something about as fine ground as powdered cinnamon.
>Wet salt
Get your salt moist enough for it to become sticky, but not wet.
Personally, I go with oil or powder route. Spray on spices are relatively expensive and a bit chore to coat popcorn well with, and I have not tried wet salt approach when it comes to popcorn.