Right side bottom of jug "sweating"
 

1993 3TB 3UW with 16K miles
Hope to get another 10K miles before replace gaskets.
Is there anything I can "paint" on to slow the seep?
Thanks

Nope !

Only slight hope would be to clean up good with degreaser and try to force some rvt in the crack with finger and put a bead across the whole thing. Hot/cold cycles will probably loosen it up and leak again.

That is were the oil travels to the head. The gasket there does not come with top end gasket sets. It is a sleave that goes in a grove in the case and jug. THUMPTHUMP

Same rubber sleeve goes between the head and cylinder as well. These should be replaced if you have the original ones.