Effective in a pinch
My contractor suggested that I call an insulation company to seal and insulate a strange part of my house using spray foam. None of the companies would roll a truck for such a small job, but one of them suggested I do it myself. EES customer support helped me select a two-component closed-cell foam and answered all of my questions about it. The foam was easy to apply, but a bit difficult to get even coats without experience.