To create a long-lasting watertight repair on a galvanized tin roof, you need to use galvanized metal and a sealant that does not break down when exposed to ultraviolet (UV) light. This eliminates caulk and silicone sealants, as both break down when exposed to heat and UV rays. When the sealant fails, water will penetrate the hole repair, allowing rust to form under the roof repair. When rust forms, it will extend the size of the hole that you have fixed in the galvanized tin roof.
How to fix a hole in a Galvanized tin roof
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