Home How-to Tips-How to Apply Polyurethane to a Wood Surface

Applying Polyurethane takes time and pateince. Polyurethane might be hard, like fiberglass, squishy like upholstery foam, protective like varnish, bouncy like rubber wheels, or sticky like glue. Since its invention in the 40s, polyurethane has been used in everything from baby toys to airplane wings, and continues to be adapted for contemporary technology. Polyurethane is a substance categorized as a polymer based on its chemical structure. Depending on your particular application, usually being applied with a paint brush over an existing coat of paint or on unfinished wood for a more natural finish




* Depending on the size of your project: 1 quart can
* Paint Thinner for clean-up
* Oil based paint brush
* Or all paints Paint Brush
* Sand paper


Step 1
Lightly sand the surface that you want to apply the Polyurethane to. This will create a "toothe" effect for the Polyurethane to adhere to.

Step 2
Open your can of Polyurethane, remember not to shake to can, (will produce bubbles, if your Polyurethane can gets shaken, allow to settle for 24 hours). Apply the Polyurethane with a paint brush, using long, even strokes along the grain of the wood, or if the surface is already painted use long even strokes in one direction.

Step 3

Allow to dry for the recommended amount of time that is listed on the directs of the product that you are using. Usually 8 to 10 hours, after which you will need to lightly sand the surface again.
Step 4

Apply a second coat of Polyurethane and allow to dry before touching or using. Usual drying time varies depending of the temperature and climate of where you are at when applying the Polyurethane



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You will need mineral spirits to clean your brush with.
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Wear protective gloves while applying.
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Wear a mask while applying.