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Old 04-25-2013, 02:00 AM
terracon terracon is offline
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Join Date: May 2010
Posts: 13
If it's a solvent based sealer I know the Techniseal reps say, Xylene is your friend. You may have moisture trapped under the sealer or it could be efflorescence. What I would do is test a small area with Xylene, This will break down a solvent based sealer and it will let the moisture escape. Efflorescence will take longer to get rid of. Hopefully it's not that. Try the Xylene option on a small area. As a last resort the sealer could be stripped but that is a total nightmare situation and you want to avoid that imho!
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