Floor coatings and epoxy

• Where the floor isA garage, a basement, a shop floor, a commercial kitchen
• The age and condition of the slabCracks, pitting, or a previous coating
• Whether the slab ever gets dampA basement floor that darkens in humid weather is telling you something
• The square footage and whether the space can be emptiedIt cures in stages

General guidance, not advice on your own situation. The person you hire decides what applies to it.