will this remove water stains?

It worked very well on the small mold discoloration. I'd try it for water stains because of the completed coverage on the darker mold stains. Seems as opaque as would be needed....

Need to wait 2 days before applying second coat to undersink area. Is that a problem?

I do not know for sure; I used the stuff in an un-ventilated cupboard and applied 2 coats as 1/day. I do not recall anything thing that conditioned application other than to be sure that the previous coat was dry. Clearly there is some chemical reaction going on, but once dry one may imagine that the process is complete? Good luck.

Did this get rid of mold? For how long? Did the mold come back later?

Yes it did get rid of the mold. There are a couple of spots where the mold is returning but they seem to be areas that did not get as much paint but even those areas took about 6 months to return. I highly recommend this item in fact I am planning to order more for another room. T

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Zinsser & 276087 QT Mold Killing Primer - Quantity 1

Zinsser & 276087 QT Mold Killing Primer - Quantity 1

Product ID: 171057632

Details

Brand
Zinsser
Colour
white
Finish Type
Matte
Item Volume
946.35
Size
1

💧Water-resistant & durable

🦠Kills mold & mildew effectively

🖌️Paint directly over mold

442 zł

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Sold byAmazon PolandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🛡️ Defend your space with the ultimate mold-killing primer—because your walls deserve the best!

MOLD ANNIHILATOR - Eradicates existing mold, mildew, and odor-causing bacteria for a fresher, healthier space.
DUAL SURFACE POWER - Bonds seamlessly to chalky siding, masonry, metal, wood—perfect for both interior and exterior use.
QUICK DRY EFFICIENCY - Dries to a matte finish in just 4 hours with full cure in 1 hour—get back to your project faster.
WATER RESISTANT SHIELD - Provides a durable, water-resistant barrier that keeps surfaces protected and looking pristine.
EPA REGISTERED ASSURANCE - Backed by EPA registration, ensuring trusted, professional-grade protection.

Zinsser 276087 QT Mold Killing Primer is a professional-grade, EPA-registered, water-based primer designed to kill existing mold, mildew, and odor-causing bacteria. It bonds effectively to multiple surfaces including metal, wood, masonry, and chalky siding, suitable for both interior and exterior applications. With a quick dry time of 4 hours and a durable, water-resistant matte finish, it offers reliable protection and long-lasting results.

Specifications

ASIN	B00K7FEQPI
Age Range Description	Adult
Best Sellers Rank	#36,846 in Home Improvement ( See Top 100 in Home Improvement ) #37 in Primer Paint
Brand Name	Zinsser
Color Code	#FFFFFF
Colour	white
Container Type	Tin
Coverage	Medium
Customer Reviews	4.5 4.5 out of 5 stars (3,227)
Dry Time In Hours	1
Finish Type	Matte
Full Cure Time	1 Hours
Global Trade Identification Number	00020066238032
Included Components	Primer
Indoor Outdoor Usage	Indoor
Is Waterproof	True
Item Form	Liquid
Item Type Name	paint
Item Volume	946.35 Millilitres
Item Weight	0.09 Kilograms
Manufacturer	0
Model Name	Zinsser Primer para matar mofo
Model Number	276087
Paint Type	Water-based
Part Number	276087
Size	1
Special Features	Mold Killing
Specific Uses For Product	Interior/Exterior
Surface Recommendation	Metal, Wood
UPC	020066238032
Unit Count	32 Fluid Ounces
Water Resistance Level	Water Resistant

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How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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442 zł

Duties & taxes included

In stock

Sold byAmazon PolandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Poland.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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