Can the 4 in. x 4 in. x 10 ft. Galvanized Steel 90° L Flashing be used on a patio to stucco flashing?

It can be attached with fasteners, or a standard roof sealant. If attached with sealant, it should be sealed around all edged to not allow water to seep behind it.

It can be attached with fasteners, or a standard roof sealant. If attached with sealant, it should be sealed around all edged to not allow water to seep behind it.