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Duct tape a square patch of clear plastic sheeting to a bare unfinished spot on the floor. Seal all edges with duct tape and wait 2 days. If there is condensation on the underside of the plastic or a dark damp moist square of concrete under the sheeting... you have a moisture problem contributing to the issue. You did not mention the reason you are priming ...


The problem you are having is not uncommon. It is a basement floor so im guessing below grade. There should have been a layer of 10 mil poly under the floor when it was poured but either way concrete leaches moisture. This is a contributor to your problem. IF you didnt thoroughly wash the floor (i mean powerwash) with a bleach based cleaner you will have a ...

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