Replacing fuel pump...gasket sealant?

spray copper works great too. silicone has its time and place, but ultra black and right stuff are certainly great choices.

gasket sealants, and methods for that matter, are like beer and women. you find out what you like and what works for you and tend to stick with it.

i won't bring up motorcycle type sealants lest i draw the ire of the grumpy and old. no need to get the locals riled up, chi-chi.
I've seen Sportster cases with freaking orange RTV juicing out of where the cases split.... actually my HD service manual recommends that Indian Head shellac on some spots.. most everything on the top end of an iron head you do dry rocker boxes and jugs anyhow