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Mold Killing Interior Multi-purpose Water-based Wall and Ceiling Primer ( 5-gallon )

Ratings & Reviews for Zinsser Mold Killing Interior Multi-purpose Water-based Wall and Ceiling Primer ( 5-gallon )

4.6
322
Review
 4.6 out of 5
323 Reviews


94% Recommend this product

Ratings may include incentivized customer reviews.

What Customers Are Saying

Customers overwhelmingly praise this primer for exceptional mold-killing performance and reliable coverage. Most highlight its ability to eliminate mold without prior surface removal and prevent regrowth for months or years, even in high-moisture environments like bathrooms and basements. Reviewers consistently note excellent single-coat coverage that hides mold stains effectively and applies smoothly. A few mention it works best on mold specifically rather than other stains, and some note occasional odor concerns. Overall, customers consider it a trusted, highly effective solution for mold-prone areas.

Customer review summary generated by AI, including incentivized reviews.
323 Customer Reviews

Good product

It seems to have killed the mold.on my bathroom ceilings. It did at least hide it. It didnt seem to take long to dry and the smell didnt last long

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Would Recommend

We bought this to cover plywood at our church on the floor. the church is 185 years old and needs a replacement floor as it gets damp in the basement. this product will hopefully keep tildew.

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Provides peace of mind

Would Recommend

Hopefully this helps! Cleaned off the mold and applied.

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Would Recommend

I was painting on a wood ceiling in a well room. It was a little difficult to use a roller. It dripped a lot. Covered ok after 2 coats.

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Works great!

Would Recommend

Very happy with my purpose. I had some mold in my bathroom from a water leak. The actual wood was strong and in good shape. I decided to give this a try versus hiring someone to replace the wood. It worked great!! I recommend this product!

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Great for mold and bad smell! Must have!

Would Recommend

Great product to cover mold and odor! Easy application and smooth finish, no more mold grow and bad smell, highly recommended!

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Would Recommend

The product did the job very well without extra effort, with premium results

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Smooth application

This is an unfair review because mold takes time to reoccur once you've cleaned it up. So it's a little hard to put a review but the product went on like it should. Here's hoping it stays mold free.

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Great Quality

Would Recommend

We used this in our basement which had a mild mold issue, and there has been no more mold since applying this. This primer covers and applies very well. Most of it was done with a paint sprayer and it went on great.

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What a waste

Would Not Recommend

Modest coverage, but won’t bond well enough to stop painters tape peeling it off. I’m furious

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Response from Rust-OleumSupport

Nick, we appreciate you sharing your feedback with us! While Rust-Oleum Zinsser Mold Killing Primer dries to the touch in as little as 30 minutes, it... Read More

Rust-OleumSupportSeptember 9, 2026

Rustoleum