New Xodus Heat Set Mediums in a trial size by MacPherson Arts and Crafts.
These jars hold 3gms of medium each.
MATTE, THINNING MEDIUM, SatinTEX, THICK AND GLOSS
Instructions are included in the package.
The paint will need to be heated to 130C. for 8-10 min. to set.
There is a YouTube tutorial on using this if needing more information.