I have trex decking. Granted, it is on my semi-covered porch, but it has been out there for almost 22 years in the rain, snow, 100 degrees to minus 20. Performance has been perfect - no issues at all. No slivers, no warping, no splitting, no staining or seal necessary. But the joists underneath the trex are rotting, so when I redo my deck in a few years, I plan to save the trex and reuse it but replace the joists with pressure treated.
