Name:   George - Subject:   Dock sealer? Finally back on the lake! Date:   6/18/2014 10:26:58 AM

My opinion is don't seal treated wood.  I know a lot of people will disagree, but it's a fact that wood must have a certain percent of water (say 20% for example).  If it had no moisture, that would be dry rot.  If it has excessive moisture, that would be rot rot (for lack of a better term).  Deck boards absorb and evaporate moisture all of the time and this natural process keep the boards healthy for 10-15-20 years.  If you seal/paint the boards, you inhibit the evaporation and the board retains too much water and this shortens the life of the board.  I figured this out years ago when a section of flooring in my boat rotted.  A repair guy told me he would take pressure treated plywood and fiberglass encase the piece.  Within a year it rotted completely.  I'm not an expert, but in Lifer's words "IMHO".