Cover the base coat with a piece of glass membrane fabric.
Roof repair gap in tin.
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.
Fill small nail holes with silicone caulk or roof cement.
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.
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.
How it works the metal retrofit system is installed by filling in the area of the metal panel between the metal ribs with an insulation board.
Apply uniform layer of metal roofing base coat 6 inches each way of the gap at the overlap with a paintbrush.
I am not a professional roofer but.