Do I need to use gasket sealant when fitting the head on the mount field engines

Ajit, September 2014

You shouldn't need a sealant, but a new gasket is recommended

cv, October 2014

Very probably yes.
And to be sure, it's highly recomended to also use a new gasket if possible: Removing the head involve a great risk of breaking the gasket.
At least that's the thing to do I've seen in every books and other documents I've ever seen about opening any gas engine and reassembling it.

Electro, September 2014