Any one-to-one slow cure epoxy will outperform PU adhesives. It soaks
into the end grain and that just makes it so much stringer. Acetone is
a typical easy cleanup solvent many of us keep around. As a practical
matter, I have epoxy end bonded red oak trim scrap into useable lengths
to finish up a job without another trip to Menards. Resulting pieces
stained and varnished fine with the seam almost invisible (sharp saw
blade, ya know).
One kind of adhesive in the shop just isn't enough. Titebond, Gorilla
Glue, whatever, all have advantages and disadvantages. Use them where
they work the best.