Disclosed herein is a fibrous mat-faced cementitious article comprising: A cementitious core, and a first fibrous mat comprising polymer or mineral fibers and a hydrophobic finish (preferably selected from talc, wax, a hydrophobic resin, a silicone-based compound, a fatty acid or salt thereof, polyethylene glycol, a hydrocarbon or fluorocarbon surfactant having 12 or more carbon atoms, or a combination thereof) on at least one surface thereof, wherein the hydrophobic finish is in contact with the cementitious core.
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