Water Inlet Leak

[Steves46]

Good day. I had to remove the water inlet (next to the oil fill tube) on the engine to do some work. Prior to reinstalling it, I inspected the gasket which appeared to be good, applied some Permatex 2 and reinstalled the inlet. Started adding water and now have a leak. I guess my first step is to order a new gasket and/or apply some Indian Head shellac and see if that will stop the leak. Am I on the right path or is there anything else I should do? It wasn't leaking prior to initially removing the inlet so I am a bit puzzled why it is leaking now. Thanks for any guidance. Steve.