Howdy, fellas. Looking for some guidance on concrete sealers.

Have a new shop going up and want a clear concrete sealer to protect the fresh floor from stains. Not interested in any paint/color coatings. The finish on this floor is smooth — no broom was used. Moisture barrier was also used before slab was poured, but anything that will add additional moisture seepage is a good thing. Main concern is keeping it looking the best it can for the foreseeable future. Drip pans will be used under all the cars, but the eventual spill will happen along with grease/dirt from working on stuff and want it to be easy to clean up and not leave unsightly stains.

Lots of options out there with wide price ranges. Anyone have experience with this? Thanks in advance.
Kent