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Using a Mold Killing Primer

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07-09-16, 07:07 AM

johnam

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Using a Mold Killing Primer

I have vertical cedar siding that is showing mold under the semi-transparent stain. Does "Mold Killing Primer" followed by solid stain or paint really work? Would appreciate you expert opinions and thanks in advance.

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07-09-16, 10:12 AM

marksr

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I've never heard of a mold killing primer although some paints have more mildewcide than others. It is not a good idea to paint over mold/mildew! I'd wash the siding with a bleach/water mixture and rinse well to remove the mold/mildew. You can add extra mildewcide to whatever coating you use.

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07-09-16, 10:43 AM

johnam

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Marksr, here is the product I was referring to: Zinsser® Mold Killing Primer

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07-09-16, 11:02 AM

marksr

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Zinnser makes great primers so I'm less inclined to dismiss their claims BUT I'd still fill better about doing the best I could to wash off the mold first!

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