Do you know if there is anything made tha will go behind siding of the upper part of a roof but then go on the top of a "R" type metal roof so that it follows the ridges of the metal roof but still stays behind the steel (metal)siding.

Lead,...10" roll,...5 up the wall ...5 on the roof. You`ll be able to roll it smooth on a flat wall and or conform it to most any shape of meatl roofing. Put a bead at the joint under the lead.