"JayTKR" wrote
trader4 wrote

The dehumidifiier is probably a better idea than adding heat/ac
registers to the basement. Doing so might bring that slight musty
smell to the whole house instead of eliminating it. Also, it may
cost more in energy cost than running the dehumidifier.

Additional note is the existing HVAC was for the size of the house sans
basement. Trying to extend it to the basement will probably overload the
system which at best will make it just not able to properly heat/cool, and
at worst will burn it out causing complete replacement. The HVAC guy will
notice that though and warn ya ;-)

For the floor, I'd just go with any of the paints made specifically
for concrete. That's what I have on mine and it's held up well. I
just use my basement for storage. If you want a tougher product,
then the epoxy product could be a good choice.
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Thanks. I am still a little undecided, but I think I'm going to go ahead
with doing the DryLok first and then latex porch and floor paint. The
reason is that it's okay to paint over DryLok but not okay to DryLok over
paint. So, I'm thinking I'll try the DryLok as the sealer and to adhere
to the concrete, then paint over that. Also, both the latex DryLok and
the latex paint are supposedly able to "breathe" a little.

I think the drylock and cement paint will be fine.

The faint mustyness is probably more related to lack of airflow stirring
about if it's as well sealed as it sounds. I'd try a dehumidifier that also
has a bit of a fan unit to it and see if that helps, as my first tactic. If
it seems to help (will take a few days) you may just need an ionizer fan
unit to complete the process. Your renters will vastly prefer to not have
to pay to heat a storage basement in winter.