Hondabond 4, and Yamabond 4 are both rebranded threebond. I went to the local Honda motorcycle dealer and bought a tube for 6 bucks. It looks like this:
Dirt Bike Pro Honda Hondabond 4 | MotoSport
I used it on the cam tower to head surface and on the chain case to engine case surfaces with no gaskets because the heads had been milled down around 018" and going gasketless on the chain cases made them line up with the cams just right. The motor has no oil leaks or oil sweating anywhere.
It's nice stuff and cleans up easily with laquer thinner on a rag.