I've used an epoxy from Lowes because the pipe was right up against the
wood. It was two years ago and it hasn't leaked yet. However, I tried to
use it again last year and it had gone bad. It is a lot of money for a
couple joints.

One of these days I am going to try a CA glue called "just for copper"
because it claims it can be used on dripping pipe; but haven't gotten around
to buying it. Give it a try and let us know how it goes.

That said, pine is difficult to actually set on fire with a propane torch; a
little scorching never hurt anyone.