china wall sealant??

My method........For what it's worth. :)

Remove tabs on head gasket.
Clean area with lacquer thinner, NOT brake cleaner .....Then do it again.
Smear of your choice of sealant around the water ports.
Small bead of sealant at head/china wall junction.
High tack spray on underside of China rail gasket to keep it in place.
Another small bead of sealant in the same place as the first, but with the china rail gasket in place.
Lay the intake down and loosely install.
Wait and hour and torque it to spec.

No leaks for me.