Hi guys I was wondering whether standard polyurethane or a UV activated resin would be better for applying directly to MDF wood in order to protect it from the elements of rain ice and snow basically is one product more durable or reliable than another with respect to weather-proofing wood thanks

This is going outside??

Remember that anything that soaks into MDF weakens the natural MDF itself. Of course with coats and layers that can be improved. Glass covered wood boats weather lakes rather well which gives you a hint to one approach that will work if it is truly going to be in the elements.

No its going to be in my car but my trunk tends to leak water and collect moisture/morning dew in the rain and winter months here. There is a layer of frost and ice that tends to form on the bottom floor where the base of the box will be so I worry about it softening and weakening the MDF wood over time

Edited February 23, 201510 yr by DedicatedEnthusiast