Heat sink glue?

[Mister_Anderson]

Ok.
I have a MM ESC also and was pondering the thought of a larger heatsink.
I have one that was given to me free with a fan installed on it. Bonus, I know.
It looks like quite similiar to the one on the left. Except it's black.

How would I go about removing the Original heat sink?

I heard mention of the freezer but I'm not sure.

Thanks.
Mister_Anderson