How thick should the silicone strips for photovoltaic panels be

Form a thick bond line to hold off the water that is at least 2 to 3 mm thick to provide a robust hold. You must make sure the sealant line isn't too thick because it could lead to cohesion problems. [pdf]
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Photovoltaic bracket thickness requirements

According to the requirements of national standards, the average thickness of the galvanized layer should be greater than 50μm, and the minimum thickness should be greater than 45μm. [pdf]