Hot really necessary, but more of an aesthetic thing. I had mine done with epoxy so that it would look better, and be easier to keep clean. Another plus is the lack of "concrete dust" in the garage.
On the down side, it is a bit of a pain to mop up the water that comes in with the car after downpour....but that does make me keep it cleaner.
All in all, I find the pluses outweigh the minuses and would do it again.
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Retired USAF - - Now a Mallory Square FROG!
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