Post #470477 by 4WDtiki on 07/21/2009

Mold means the wood is not fully dried out yet. Mine would mold if they were kept in my dark garage, and clear up when kept out in the sun. What part of the world are you in, where it's so rainy?
I would not seal it if it's still molding/damp, but I know others have done it.
Maybe build a little greenhouse type thing in the yard, where the sun can hit it, but not the rain?