Does Kilz Work On Concrete. Do not apply over previously coated surfaces. Kilz is a pigmented shellac and is not suitable for sealing concrete. To completely strip previous coatings, use kilz concrete & masonry paint stripper.
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Is it ok to seal a concrete floor with kilz and then install carpet over it. I'd personally use kilz oil based primer. If you do use the oil based, make sure you have fresh air down there.
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As an exterior/interior grade product, the paint is suitable for use on all concrete corners of the home—think patios, porches, garages, pool decks, driveways, and more. Kilz is a product that can actually seal out the odor from your floor. Learn which kilz® primers, paints and concrete stains are right for your job. Now, having said all of that, the more effective product is bin shellac.