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Mold Killing Interior Multi-purpose Water-based Wall and Ceiling Primer ( 1-gallon )

Ratings & Reviews for Zinsser Mold Killing Interior Multi-purpose Water-based Wall and Ceiling Primer ( 1-gallon )

4.6
337
Review
 4.6 out of 5
337 Reviews


94% Recommend this product

Ratings may include incentivized customer reviews.

What Customers Are Saying

Customers overwhelmingly praise this primer for its exceptional mold-killing ability and durability. Most report it eliminates mold and prevents regrowth for months or years, even on outdoor wood in harsh conditions. Many highlight strong one-coat coverage, smooth application, and quick drying. Reviewers note it binds chalky surfaces and stops mold from bleeding through. A few mention it doesn't block non-mold stains, and some report needing two coats on heavily stained areas. A handful note high VOC content and higher pricing, though most consider it worth the investment for reliable, lasting mold prevention.

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

Provides peace of mind

Would Recommend

Hopefully this helps! Cleaned off the mold and applied.

September 24, 2026
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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.

September 21, 2026
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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!

September 20, 2026
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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!

September 19, 2026
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Would Recommend

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

September 19, 2026
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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.

September 15, 2026
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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.

September 14, 2026
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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

September 8, 2026
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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

Great fir bathrooms

Would Recommend

Used this in my bathroom in my 100 year old house to keep mold and mildew from coming in on the new bathroom drywall. I have used it over the years and it has covered, and dried great.

September 1, 2026
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