Polyurethane and lacquer are options for finishing your floor. Instead of bonding to the wood, polyurethane and lacquer coat the floor, adding a layer of finish on top of the wood.
These finishes are a good choice to use when you want a higher sheen on your floor, or when the floor needs a lot more protection. For example, when we sanded this parquet floor to refinish it, we found it was very thin a delicate, and polyurethane gave a very strong coating to protect this heirloom.
We use Poloplaz because it is used by professionals across the country and in our experience is the most reliable polyurethane on the market.