And just like epoxy, it's moisture. In terms of advantages, polyurethane is highly resistant to scratches and quite durable, although less so than epoxy. Like epoxy, it is resistant to moisture, although also less than epoxy. Polyurethane phenolic resin is an alternative floor covering with a wide range of applications.
In addition, polyurethanes are thermosetting polymers that are often used as finishing layers in floors. Synthetic resins are often used to work wood, such as cabinets, moldings and phenolic resin countertops. Some polyurethane resins are water-based, while others are solvent-based or oil-based. Although epoxy resins don't really have moisture resistance, moisture damage will be much less severe if installed on a concrete surface.
Therefore, epoxy is always the best choice for environments with high humidity levels. Oil-based polyurethane is more durable and the finish has a more intense shine, looking and feeling like glass or epoxy. It takes longer to dry and smells like turpentine for a few hours after applying it. I recommend almost any polyurethane varnish or Behlen's Rock Hard table varnish, which is an alkyd varnish that adapts perfectly to your needs.
