On Sun, Mar 8, 2009 at 1:42 PM, Gene GeRue <genegerue AT ruralize.com> wrote:Warren, please educate me on why silicone caulk would be bad for
sealing metal roof nail holes.
Because silicone breaks down in sunlight. Additionally, it loses
adhesion to metal over time. Even the "UV resistant" silicones seem to
shrink with age and eventually pull away.
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