Fill small nail holes with silicone caulk or roof cement.
Roof repair gap in tin.
Repairing a metal roof seam with turbo poly seal is simple and it is a do it yourself p.
Apply uniform layer of metal roofing base coat 6 inches each way of the gap at the overlap with a paintbrush.
Smaller nail holes will be permanently fixed by this method standard roofing nails would be either 3 8 inch or 1 2 inch making a hole.
I am not a professional roofer but.
In this video i show you a quick way to fix a hole in a tin metal roof that might of been caused by a fallen tree limb.
Typically this system is installed over a structural metal roof system where the existing roof system becomes the metal deck for the new roof system.
Cover the base coat with a piece of glass membrane fabric.