I've been researching all types of finishes and have decided to go with a type of tung oil product for my own floor but now I have to suggest something for our school and I don't think they can get into the semi-complicated application process I'm doing, so I was looking for an easier but very durable product for them.I've heard that polyurethane is one of the harder products and easier to apply. But I've also heard that polyurethane eventually cracks and peels. Don't know if it makes a difference whether it's oil or water based. That the water based is best used on light colored wood because it leaves a type of milky surface look. Best to use a lower sheen so the scratches don't show as much. What is your opinion on all of this.

Look up Rubio Monocoat.

I assume it's a wood floor. Is it a gym, a dance floor, a stage? Where is the floor and what is it used for? TIP: There are various types of floor finishes that are best suited for certain functions. There really isn't a "one size fits all" in floor finishing.

Thanks for your reply. It is a wood floor. They're sanding off the old worn finish. I have no idea what kind of wood it is. It is in an old school building and will be used as a large office. there will be lots of moving around of desks and other furniture. It will be fairly high traffic

There is NO finish that will withstand abuse like sliding furniture around on it. I recommend that furniture be picked up when moving it to other locations. A penetrating oil finish may be most suitable for your application but will require ongoing maintenance. Second choice would be a commercial water-based finish such as Street-Shoe" by BASIC.
Choose the lowest sheen available.
Floor protectors on the bottom of all chair legs etc. are virtually mandatory.

I checked out the Rubio Monocoat. Has anyone ever had personal experience with it?it sounds almost like getting the benefit of the hardness of the polyurethane because it sits on top of the wood and yet some of it penetrates like the oil finishes. The upkeep is like that of an oil finish. All of this in just one coat? Is it too good to be true?