I just removed a kitchen base unit to make room for a dishwasher. Underneath the unit, I found old rubble. The rest of the floor is ceramic tiles which cannot be obtained any more. So I've created a small cement section of floor with cement, where the base unit was. People won't see much of it, but is there any way I can seal the cement, so that it'll stay decent-looking? I seem to recall that cement can start looking pretty awful after it's had water and suchlike spilled on it a few times over the years.
Thank you,
Rich