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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qt Zinsser 276087 White Mold Killing Primer Water-Based Mold Killing Primer

qt Zinsser 276087 White Mold Killing Primer Water-Based Mold Killing Primer

Product ID: 14350658

Details

Brand
Zinsser
Color
White
Finish Type
Matte
Item Volume
946.35
Paint Type
Acrylic
Size
32 Fl Oz (Pack

🎨Covers 160 sq ft per quart

🦠EPA-registered antimicrobial power

⏱️Full cure in just 1 hour

$86.25

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Description

🦠 Paint over mold, not your plans — stay fresh, stay flawless!

FAST READY - Matte finish with a quick 1-hour full cure time to keep projects on schedule
MOLD NO MORE - Kills mold, mildew & odor-causing bacteria without heavy pre-cleaning
SEAMLESS COVERAGE - 160 sq ft coverage per quart for efficient, professional results
EPA BACKED ASSURANCE - Registered formula guarantees trusted performance and quality
VERSATILE APPLICATION - Ideal for residential, commercial & industrial use on wood, metal & more

Zinsser 276087 White Mold Killing Primer is a water-based, EPA-registered fungicidal coating designed to kill existing mold, mildew, and odor-causing bacteria. It offers 160 sq ft coverage per quart with a fast 1-hour cure time and a matte finish. Suitable for indoor and outdoor use on multiple surfaces including wood and metal, it’s perfect for residential, commercial, and industrial applications, enabling you to paint directly over mold without extensive pre-cleaning.

Specifications

ASIN	B00K7FEQPI
Age Range Description	Adult
Best Sellers Rank	#6,764 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #4 in Primer Paint
Brand Name	Zinsser
Color	White
Color Code	White
Container Type	container
Coverage	160 sq ft
Customer Reviews	4.5 4.5 out of 5 stars (4,380)
Finish Type	Matte
Full Cure Time	1 Hours
Global Trade Identification Number	00020066238032
Included Components	Primer
Indoor Outdoor Usage	Indoor
Is Waterproof	False
Item Form	Liquid
Item Type Name	Zinsser 276087 Mold Killing Primer, Quart, White
Item Volume	946.35 Milliliters
Item Weight	0.09 Kilograms
Manufacturer	RUST-OLEUM
Model Name	Zinsser Mold Killing Primer
Model Number	276087
Paint Type	Acrylic
Part Number	276087
Size	32 Fl Oz (Pack of 1)
Special Features	Mold Killing
Specific Uses For Product	Interior/Exterior
Surface Recommendation	Metal, Wood
UPC	020066238032
Unit Count	32.0 Fluid Ounces
Warranty Description	Warranty
Water Resistance Level	Water Resistant

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Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

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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$86.25

Duties & taxes included

In stock

Sold byAmazon USADelivered 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 USA.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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