Leak or sealant

[The_one]

Is this a leak or some sort of sealant??

I haven't noticed any running leaks and the coolant level seems fine

 

[The_one]

Anyone??

 

[RALF]

Seem's like a leak to me.

 

[The_one]

I've touched it and its bone dry

What pipes are they and can i easily replace them?