Will this work for my metal Morton building?

This will work on a metal roof, if cut right, it will never leak.

The Roof Flashing in this kit is made to work on a standard shingle roof. We have flashings that work better on a metal roof, so you might want to try one of those. Otherwise, to make this one work, you will need to build a curb or framed area at your roof. This will give the flat base plate a flat surface to which it can attach.