Anyone have any experience with using High Density urethane sheet goods?
It is a closed cell rigid polyurethane foam commonly known as Sign Foam or CoraFoam.
We're looking to construct some very large slant boards for an upcoming quilt show and are looking for a lightweight option to Medex/ Medite. From what i've found it seems to be an extremely stable material, but was wondering if anyone has done an Oddy test or had any experience with it?

Thanks
Josh Amati