I did the TrueLock TL37 densifier and Ghostshield 8510 on the my front, rear sidewalks, patio and driveway. All I can say is WOW! We poured all this last Fall and it will look new for eternity.
My neighbor even made a comment after a rain how the water never soaked into the concrete.
My plan was to have the garage floor professionally coated (epoxy or something else) but I may do the TL37 and Ghostshield 8510 in there as well.
Feff