Metal Roofs that Leak: Repair Options - Silicone coating the worst product for metal roof sealant
Channel: Flat Roof Doctor
Date: 2015-09-09

Metal roof leak repairs coated with silicone or any other foam coatings are an expensive and temporary fix. For any paint or coating to adhere well to a metal roof, the surface must be smooth and extremely clean which is difficult to achieve with the many screws and bolts and joints typically found on a metal roof. We serve Pittsburgh, Monroeville, Stamford, Greenwich, Norwalk, White Plains New York.
Metal roofs can be saved even if they have a lot of rusted spots but it becomes impossible to recover from a silicone coating. Once a silicone coating has been sprayed or brushed on, and water gets under the coating due to small pinprick holes, the metal surface is then compromised by the wet dampness accelerating rust or oxidation.
From my experience silicone coatings do not seal a metal roof surface 100% and always allow water between the metal and silicone to accumulate, even in small amounts causing rust. The problem is exaggerated around fasteners and metal seams.

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