Kolophonium - a solid brick??

[Npl]

Well, Im preparing to replace my Megic Chip with a DMS3.

I was planning to get something to easy the soldering, its called Flux in english, but that doesnt helps my in my Country
In short I ended up with a box of Kolophonium, as I read its not aggressive to metal as other solder-aids. But how is this used? Do I have to heat it up and then put it into the spot I need it?