Model # 276049

Internet #205009921

Zinsser 1-gal. Mold Killing Primer (Case of 2)


1-gal. Mold Killing Primer (Case of 2)

  • EPA registered protective coating for interior/exterior use
  • Kills existing mold and mildew and prevents growth on paint film
  • Easy project completion: fast dry times, works under any topcoat
Was  $63.94
$57.55 /case
(limit 5 per order)

Save $6.39 (10%)  through 04/30/2017

Online Exclusive Pro Special Buy of the Week
Promotion Details
Price Valid : 04/24/2017 - 04/30/2017
Pro Special Buy of The Week. Add item to cart to check availability as quantities are limited. Discount will only apply to the first five (5) items per order. Offer limited to specific colors and/or sizes.

Frequently Bought Together

Product Overview

Zinsser 1-Gallon Mold Killing Primer (Case of 2) is a water-based fungicidal protective coating that can be used to paint over and kill all existing mold, mildew, moss, fungi, odor causing bacteria and any other fungal organisms. The Mold Killing Primer contains an EPA registered antimicrobial to prevent the growth of mold, mildew and other fungal organisms on the paint film. Mold Killing Primer is for use on non-porous interior and exterior surfaces.

California residents: see   Proposition 65 information

  • Use on non-porous interior and exterior applications; works on residential, commercial and industrial applications including bathrooms, basements, window frames, office buildings, factories and more
  • Kills existing mold, mildew and odor causing bacteria
  • Does not require extensive surface prep; paint directly over existing mold, mildew, odor causing bacteria and any other fungal
  • Binds chalky siding, masonry and metal
  • Great for use under any topcoat and is ideal with Zinsser Perma-White
  • Dries to touch in 30 minutes, top coat in one hour
  • For ideal protection, top coat no more than 72 hours after application
  • Online Price includes Paint Care fee in the following states: CA, CO, CT, ME, MN, OR, RI, VT

Info & Guides

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Warranty / Certifications

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Customer Questions & Answers

Good question I wondered the same. Is it two gallons in pack?

Asked by: Chip
I do not understand why they call it a two gallon pack?? You may buy it by the gallon.
Answered by: BigG
Date published: 2015-11-07

I have a house I'm moving into and It has mold in the bathroom tring to go the cheapest way don't have much money

How do I know this will work and I have been told it's in the floors what would I do about that?
Asked by: Brenda32595
Rust-Oleum Zinsser® Mold Killing Primer is a water-based EPA registered fungicidal protective coating that can be used to paint over and kill all existing mold, mildew, moss, fungi, odor causing bacteria and any other fungal organisms*. The Mold Killing Primer contains an EPA registered antimicrobial to prevent the growth of mold, mildew and other fungal organisms on the paint film. Mold Killing Primer also aids in covering residual microbiological and fungal stains. Mold Killing Primer can be used with any topcoat, and is ideal with Zinsser PERMA-WHITE®. This can also be used on a subfloor as long as a tile, wood flooring or carpeting is being installed over it.
Answered by: Rust-OleumSupport
Date published: 2016-12-15

I used it in my bathroom. Now, rather than buying ceiling paint, since this is pricey. Can I leave the ceiling with just two coats of this?

Asked by: Anbe
I wouldn't - its a very flat paint and will catch dust and moisture - probably won't grow mold, but will look dirty. I don't use ceiling paint anyway - I always get the very whitest (usually untinted) wall paint and it stands up better. Ceiling paint is just watered down regular paint with a tint that disappears as it dries, so you can see where you've painted. In a bathroom, especially, its small enough that I can remember where I painted...
Answered by: KB630
Date published: 2016-08-03

My popcorn ceiling has stain/mold after a leaky roof last rain season. Can it be used over it?

Asked by: Thanh
Use the correct (Extra thick- 1") popcorn roller. Worked fine on my bathroom ceiling.
Answered by: DJ
Date published: 2016-03-06
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Customer Reviews

1-gal. Mold Killing Primer (Case of 2) is rated 4.6 out of 5 by 48.
Rated 5 out of 5 by from Great For Dew & Moisture Ridden Areas; Can Be Used Outside We have one spot in the back yard that between the house's shadow and the garage's shadow it receives minimal sunlight throughout the day. As a result a small portion of the garage wall grows a mossy looking dew at the very bottom of the wall near the grass line. This has been an annual frustration for us and we have lived here over 40 years. It just happens. Well, not any more. Typically I would spray the area with bleach or use one of those home wall washer products. I used this paint instead. I went about cleaning the surface area like before, but this time, I did a few swipes of paint for coverage. And then painted the wall over it. I have yet to see anything come back. According to the description, "the Mold Killing Primer contains an EPA registered antimicrobial to prevent the growth of mold, mildew and other fungal organisms on the paint film." For me, it has worked a like a dew repellent. I am hopeful that it lasts the year, and for many more years to come. For my purpose it was probably overkill to get a gallon of paint for such a small area, but there are needs that I will be putting it to good use. We have an outdoor water heater shed that is attached to the house. I will be using this in the paneling that encloses the outhouse to prevent moisture, dew and anything else from getting into the wood and making it look unsightly. I think if you live in a humid area or like me in a coastal area with salt-water air or early morning moisture in the air, this is a good paint product to have on hand.
Date published: 2017-04-10
Date published: 2016-10-04
Rated 5 out of 5 by from Watching closely We were going to put new counter tops and sinks in both bathrooms. The master bath went smoothly. When it came to the second bathroom. we found a mold when we removed the old counter top from the cabinet. I than removed the cabinet and found mold in the sheet-rock and back and bottom of the cabinet. I removed the cabinet to be rebuilt (since HD guessed $500.00 for a custom built one). After everything was taken out I painted all the studs, drywall back ( other wall) and some of the sub-floor. I hope this stuff works, the new dry-wall I cover the studs will not let me see what is happening inside the wall. The new dry-wall will also be painted (both sides) with this primer. I hope I never see mold in that area again.
Date published: 2015-11-08
Rated 5 out of 5 by from Doesn't smell too bad! Having survived painting a bathroom with oil based Kilz to kill mildew, I didn't want to do it again! This was SO much easier! No overwhelming fumes, easy water clean-up (cleaned up so well that I was even able to re-use the roller!), and it went onto the walls easily. I was most interested in the mold killing aspect, and I presume it will continue to work - so far (1 month) no mildew has returned. But it also works very nicely as a primer (duh!). Nice and thick, covering even the ugly brown that was on the wall, so I could paint 1 coat of a pale yellow! It does have an odor - must be the mold killer - but it isn't too bad, and it dissipates by the next day (with the window open). NOTHING like Kilz oil base!
Date published: 2016-08-02
Rated 5 out of 5 by from Great Investment So Far Pulling down the wallpaper in the master bathroom revealed a nightmare mess. The walls were covered with mold/mildew. I read the reviews on this product and decided it was worth a chance. It's a small bathroom so 1 gallon was more than enough to put on two coats and still have some left over. It's been just a month but, so far, there's been no tell-tale return. Prior to this purchase and application, I'd have to scrub my ceiling down with bleach at least a month. Now, it's absolutely sparkling!
Date published: 2015-07-21
Rated 1 out of 5 by from I have to write a dissenting opinion. This is latex, not absorbed by drywall, and for me it came off as I was painting!! Number one this product is overpriced. There is no way it is worth more than $20 a gallon. True, it did block the water stain and signs of mold, however as you can see it was not absorbed into the drywall. (Note: the primer had been on the ceiling for at least 2 weeks before I started painting.) I used regular ceiling paint with a little bit of added texture to cover any imperfections in the ceiling. Admittedly, it was a bit thicker and heavier than regular paint. As I was about to finish, I noticed a small air pocket where the paint and primer had come loose from the ceiling, as I went up on the ladder that small area got bigger and bigger until finally about 20 square feet had come loose from the ceiling, about the exact area that I used the Zinnser mold killing primer as opposed to my regular Behr primer. Horribly flawed product, and now I have to start over. What more can I say about it?
Date published: 2016-06-23
Rated 3 out of 5 by from On the fence about this one This is a white water-based primer that has some antibacterial elements. The intent is for a coating to kill and prevent recurrence of mold, mildew, and bacteria. It goes on fairly thick and covers well any mildew stains that are not intense. The real question I cannot answer is the long term result. After one week of applying a coat to some mildew-infected siding, the paint is still clear of the mildew that was underneath and none has reappeared on top. It will be interesting to see how long this lasts. Ordinary chlorine bleach had been used in years past to eliminate the mildew, but it always came back fairly quickly. The key chemical in this product is 3-Iodo-2-propynylbutylcarbamate (IPBC) which is commonly used in some skin cosmetics as a fungicide/antimicrobial. The EPA allows as much as 0.1% in the cosmetics, but they commonly have only about 0.012% concentration. This product has a concentration of only 0.0063%, or a little over half of what is used on your skin. I do not understand why, at least, the 0.1% concentration couldn't be used. So, I suspect this is not as effective as advertised. It would only deliver half as much fungicide/antimicrobial as a coating of Maybelline coverup. Call me skeptical, but for now I'm on the fence about this product, with 3 stars and no recommendation either way.
Date published: 2015-05-07
Rated 5 out of 5 by from Zinsser Mold Killing Primer Zinsser Mold Killing Primer did it's job well and had a pleasant smell as well. It covered the spots on the wall completely.
Date published: 2016-10-11
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