I suggest that you are asking the wrong question.
I'll ask you, why do you want to insulate it?

The condensation forms steadily on a tank when the
flapper valve leaks, causing a steady source of chilled
water to have to be delivered to the tank.

slushfund wrote in message
...
About 10 years ago I insulated the toilet tank with a kit from Home Depot
maybe. After some years it finally gave up the ghost. I'd like to insulate
it again but the kits I see now are the white styrofoam not the closed
cell
translucent sheets I'd used previously. Before I can redo it though I've
got
to get rid of the old adhesive inside the tank. Any ideas on a good
product
to get rid of this residue?
Know if they still sell that closed cell insulation instead of
this styrofoam? Haven't checked any local plumbing shops yet.