House wrap as rafter baffles? – GreenBuildingAdvisor

I’m thinking about using Owen’s Corning PinkWrap as site-built baffles for my vented cathedral ceiling. It states that it has a perm rating of 15. Would that be a good option?

I have some Lowe’s housewrap that claims a perm rating of 12 that I’ve left sitting outside and water definitely pools in it. If I leave it crumpled up, I often see water just sitting in it days after a rain. So I’m also curious how effective the stated permeance is at allowing water to migrate out.