Yes, some types of Magnesium Oxide (MgO) boards can “sweat” or leach fluid in humid conditions due to a process similar to deliquescence.
This phenomenon, often called “crying” or “sweating” boards, is a serious concern primarily associated with MgO boards that use magnesium chloride as a binding agent, which forms magnesium oxychloride cement (MOC).
The Mechanism of Leaching/Sweating
The “sweating” is a direct ...
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2025


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