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Old 09-30-2009, 09:27 PM   #1
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Priming for a self leveling underlayment

I'm going to use a self leveling underlayment in my basement (Laticrete 86) and I need to prepare the floor with the primer. Currently there is some paint on the concrete that the previous owners put down. I have no idea what kind of paint. Some of it flaked off, but most of it adheres to the concrete pretty well. Is it absolutely necessary to remove this paint? What will happen if I just put down the primer on top of the paint?

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Old 09-30-2009, 10:01 PM   #2
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Priming for a self leveling underlayment

It is only absolutely necessary if you want the job to work.

Applying primer to the paint will not make the paint stick better to the concrete. Do as the directions tells you.

"Do not install over painted or gypsum-based surfaces."


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Old 10-01-2009, 09:32 AM   #3
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Priming for a self leveling underlayment

The existing paint MUST be removed mechanically. No chemicals can be used for this process.
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