Cleaning sump sealant.

[Pink_Floyd]

I have just taken my sump off, think it was sealed with silicon, what is the best way of removing it?

What is the best stuff to use to put it back together again?

[V8 Animal]

Sharp blade should be ok.
Loctite instant gasket from halfords just make sure it resists oil.
V8 Animal

[Red Cabbage]

Sikaflex 221.