[klondike98]

Am working on a 49-905 that I picked up.  It has a multicap electrolytic can with 40-40-70 uF.  Got the can apart to stuff new caps inside.  The can shell itself is the common negative that is at B-.   Just to be sure I hadn't caused a problem I checked for shorts between the 3 lugs that connect to the positive side of each of the 3 caps and the can shell.  I find that there is a measurable resistance between each lug and the can that ranges from 1 to 2 meg ohm.  There is a red colored rubber-like coating at the base of the can where the lugs connected with the guts of the can.  I cleaned the rubber, sides of can, and wafer around the lugs with alcohol but still see measurable resistance.  I put the ohm meter probes on the rubber itself and can measure resistance across the rubber.  I suspect it has gotten impregnated with the old electrolyte.  I might be able to dig out the rubber but its fixed in there pretty well.  
Has anyone seen this before and have a fix?
I assume this leakage between B- and the positive leads is not acceptable; correct?
Pic below showing the rubber coating on the inside of the can bottom. Thanks for the advice in advance; I suspect there will be more questions as this project proceeds.

[Image: https://www.dropbox.com/s/jydsn1ty00s7qm....jpg?raw=1]