This is the same Mounting Paste we use in our workshop.
You receive small plastic can with a screw cap. It contains 35 gram of the tire mountin paste and is good for 20-30 tire changes.
Use a small or brush or kitchen paper and apply the tire mounting paste und the tire bead. The tire will glide on to the rim much better than without the paste.
Base price: EUR 7,00/100g