deck spots

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Old 08-04-01, 06:22 AM
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We have a pressure treated deck that is 8 years old. We have always used Thompson's waterseal on it. This spring we decided to stain it. Since that time we have had white spots appear after a rain. Mostly the spots come close to a knot hole mark. How can i stop this from happening?
 
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Old 08-04-01, 07:46 PM
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Those white spots are a build-up of the Thompson's that you have been putting on. Knots are extremely hard wood and Thompson's (or any other sealer) will simply not penetrate it.
 
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Old 08-05-01, 04:34 AM
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Joe,
Lefty is on the right track. You should have stripped the
waxey Thompson's before you tried to apply a stain. If there is any kind of water beading on a deck, it needs to be stripped before staining.
fred
 
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