"Jim Wild" wrote:

Great question huh? In fact, I need to preserve this half way rotten
stump for a possible piece of art to be mounted on top of it. (On a
golf course) It is 3' in diameter at the base, 4' tall, but has a rotted
center that you could fit a bowling ball into. We are planning a very
large and expensive wood carving to be mounted on top of this stump.
Will filling the rotten middle with cement stop the rotting process for
at least a few years? If you can answer that one, your good.

Had a neighbor who had a large beech tree stump with a serious rot problem.

Dug out all the rot and filled with a motor mix, then built about a 10
ft dia table top on top of it for a picnic table.

Got about 10 years out of it.

Since this is a golf course, my first thought would be a heart to heart
with an arborist and go from there.

Lew