i see lowes has rollers for driveway sealer, kind of like paint
rollers only bigger. instead of a squeegee or brush. what does the
assembled wisdom say about this?

I would think a roller would not push or force the sealer into the tiny
nooks and crannies as a brush does. Though I've never used one I'd
think the squeegee is much better ar providing a consistant thickness of
the coat, too.

If you try it, let us know?