How to Apply Zar Oil Based Polyurethane


Zar is a name brand of polyurethane made by United Gilsonite Laboratories. Zar oil-based polyurethane comes in two types of sheens: gloss and satin. Zar's polyurethane is safe for use on many different types of materials such as wood, metal, vinyl, and fiberglass. This type of finish is used on exterior surfaces as well as interior, depending on the type you may purchase. Polyurethane is typically a clear coat of varnish, but it can come in different tones of brown when needed.

Things You'll Need

  • Zar oil-based polyurethane
  • Paint can opener
  • Dry, clean cloths
  • Foam brushes
  • 280-grit sandpaper
  • Plastic bag
  • Open the can of Zar polyurethane using the paint can opener.

  • Sweep the object off with the dry and clean cloths. This is done to remove dirt, dust, and other debris from the object that is to be finished.

  • Paint the first coat of polyurethane on the object. Allow to dry overnight. Sand the first coat with 280-grit sandpaper and then wipe down the object with a damp cloth. Depending on the size of the object, you may need more than one cloth to wipe the entire object.

  • Apply two more coats of the oil based polyurethane to the object. Allow the polyurethane to dry and cure completely. This process may take up to 24 hours per coat.

  • Throw away the foam brushes in the plastic bag and tie up the bag.

Tips & Warnings

  • You can use a hand sander if you have one to simplify the process. Zar oil-based Polyurethane is sold at most home improvement stores.
  • When working with chemical based liquids, always work in a well-ventilated area to avoid respiratory issues. Do not inhale or ingest this liquid as it is a poison.


  • Photo Credit wooden bench image by Christopher Dodge from
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