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Question DetailsAsked on 6/30/2014

What brand Deck Sealer to use with old deck boards.

Deck has been painted in the past & keeps peeling. Many types of Restore Sealers are out there & I want to do this the last time for awhile. I will sand it down to bear wood to restore it. I will use a Stain if needed.

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Probably peeling because you are using a high-body finish like paint, or had a silicone sealer put on it once which other finishes will not stick to.

My recommendation - only three things that will solve your issue, in my experience - new boards with a low-body penetrating oil based stain or copper napthalate preservative, flip boards over to other side and ditto to above (if not rotted), or use deck paint stripper, sand, then pressure wash, then after thorough drying use penetrating oil based stain or, for longer life (though color range is limited) a copper napthalate preservative (the green treated wood type), which comes in green and brown and can be color darker but not lighter.

ANY paint or full-bodied stain will let water in at cracks and splits and micropores in the finish, but not let it evaporate fast so WILL cause water retention in the wood and peeling - period.

Note on the sanding to bare wood - you will go through DOZENS of belts or paint stripper pads to try to strip it that way - I recommend a chemical stripper to remove essentially all of it before finish belt sanding. If adverse to chamicals, then a commercial floor sander with mesh abrasive pad followed by coarse sand pad, which will leave big swirls on deck, then belt sander with probably about 30 or 40 grit belt followed by about 80 grit for smoothing, along the grain to remove the swirls. You are looking at a LOT of work -why most people in your situation wither put on new boards or, if DIY and short of cash, flip the boards over if in basically good condition - but will need sanding to remove staining at support timbers, and WILL need staining to fully conceal that.

Answered 5 years ago by LCD

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