Can you use polished concrete outside?

Yes you can, polished concrete can be used outside.

Polished concrete has lots of uses and works great for driveways, patios and even commercial applications like malls and airports. It is easy to maintain and highly durable. Polished concrete has finish that makes it resemble hardwood floors or terrazzo flooring. Once it is polished, there are no waxes or coatings that you need to worry about.

The decision to use polished surfaces outside is really up to the contractor doing the work. It all depends on what look you want to achieve on your outdoor surface areas as well as how much time, effort, and money you want to spend maintaining them over time. Everything comes down to personal preference at the end of the day so speak with your contractor if this sounds like what you are thinking of using for your home.