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I noticed while reading troughout the forum that some people seal the ends of the boards they set out to dry. Is that because wood absorbs moisture from the ends?
 

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I noticed while reading troughout the forum that some people seal the ends of the boards they set out to dry. Is that because wood absorbs moisture from the ends?
It's because moisture exchange happens quicker on endgrain than other faces of a board. This means it will either gain or lose moisture quicker near the ends, depending on the relative moisture content of the wood and the air around it.

Different moisture content in different parts of a piece of wood can lead to warping or checking (checking is the biggest risk on the ends).
 
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