How does marine grade polyolefin compare to traditional marine plywood?

Marine grade polyolefin sheet offers several advantages over traditional marine plywood. Unlike plywood, it will not absorb water, swell, or rot. It is also UV stabilized, so it resists fading and degradation. In terms of fabrication, polyolefin machines easily with standard woodworking tools, but it cannot be glued or painted like wood (mechanical fastening is required).