When my marksman was brand new the acetone leaked very slowly when the pot was warm, but once frozen, the fit, which is already super tight, sealed itself. After a few uses and not separating the base from the sleeve, its perma stuck now and leak free even warm.
If you wrap your pots before insulating that stuff shouldnt bother you any... if it does leak a bit though, my advice would be to just wait until your pots around -20c before you add any acetone.I keep mine just below the top of the fins anyhow... so there is no chance of a leak; seems to be around an "optimal" level of fluid for the pot too... if you need pull-down a bit faster on DICE.. you can add a bit more acetone [from my experience].
Enjoy!! Remember.. the base doubles as an aircooler too ... a pretty good one I might add.