MDF is a great material for making furniture and other indoor items, but it’s not suitable for outdoor use.
The main reason is that MDF is a porous material and it doesn’t seal or weather well.
This means that water can get into the wood, which can lead to warping, swelling, and rotting.
So if you want to use MDF outdoors, you’ll need to seal it with a waterproofing agent like polyurethane or paint.
However, even if you seal it, MDF is still not as weather-resistant as other materials like wood or plastic, so it’s not recommended for use in extreme weather conditions.