Valve cover tightening torque? for Cayenne
 

I am in the process to replace the valve cover gasket on driver side,
Because of oil leak. for Cayenne 2005 turbo done only ~55K miles
need to know:
What is the valve cover tightening torque?
Shall I use gasket sealer along with the new rubber casket?
I can see the original gasket had used some sort of sealer to seal some corners, what sealer shall I use?