Most exterior polys can be used indoors, but interior polys should never be used outdoors; they lack the additives that protect exterior finishes from UV rays.Click to see full answer. Thereof, can I use Minwax polyurethane outdoors?Polyurethane can be used successfully outdoors if it has the proper ingredients. Look for a finish that has additives for ultraviolet protection. The label should say for exterior use so the dried finish will flex with the expanding and contracting wood.Similarly, how long will Polyurethane last outside? Gloss oil-based varnish, polyurethane and Danish oil can last 10 or 20 years, though satin finishes and stains may fail sooner as pigments and flattening agents disable the driers. Water-based coatings and paints can also be viable longer than three years. Shellac, though, can go bad in under a year. Correspondingly, can I use interior stain outdoors? Interior lacks the UV protection of the exterior product, so it will fade if exposed to the sun. If not, it will last just as long. And if you re-stain with the same exterior color it will be darker. You may need to go lighter with the exterior stain to keep it close to what you are looking to have.Can you use Minwax interior stain outside?Minwax Wood Finish pigment stains are not intended for exterior applications. The UV in sunlight will fairly quickly cause the stain to lose color. All that said, the fact that the item will be basically protected from the elements, an exterior oil based varnish will work well on top of the stain.
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