Cylinder Head/ Coolant pipe fitting

Evening all

Going to be fitting a new Cylinder head to my 300 tdi disco1 hopefully the weekend, question is when fitting the coolant pipe adaptor (part no 624091) to the new head is any sealant / instant gasket / threadlok etc used.

Had a good search and found lots of people talking about this part but nothing specific about how it is fitted.

Surely if just screwed in unless its a very good fit(or tapered) it would leak, apparently it is torque is 22 nm

Any info would be appreciated hoping to get this fixed once and for all after I broke down Boxing Day

Thanks

Daz