Many DIY hobbyists often ask if they can use PLA to create parts or projects to be used outdoors. The good news is that PLA is durable enough to use for several outdoor applications. While PLA won’t melt in the sun, excessive and constant exposure can cause the application to become brittle. The project can lose its tensile strength and even impact resistance. To prevent this, it’s recommended that you place your outdoor applications under protective shade, which will prevent deterioration caused by sun and rain.