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 Mold Killing Primer, Quart

Product ID: 14350658

Details

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

🎨Covers fungal stains with smooth matte finish

🦠Kills mold & mildew effectively

🛡️EPA registered antimicrobial protection

KSh12324

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Sold byAmazon KenyaDelivered 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!

BROAD COVERAGE POWER - One quart covers up to 160 sq ft, perfect for residential, commercial, and industrial spaces.
FAST DRY MATTE FINISH - Achieve a professional, stain-free look with just 1 hour to full cure.
EPA BACKED PERFORMANCE - Trust in EPA registration for guaranteed antimicrobial efficacy and quality assurance.
VERSATILE SURFACE SHIELD - Works seamlessly on metal, wood, and under wall coverings—indoor or outdoor.
MOLD MILDEW ANNIHILATOR - Paint directly over mold without tedious pre-cleaning—save time and hassle.

Zinsser Mold Killing Primer is a water-based, EPA-registered fungicidal coating designed to kill existing mold, mildew, and odor-causing bacteria without extensive pre-cleaning. Ideal for use on metal, wood, and under wall coverings, it offers a fast-drying matte finish and covers up to 160 sq ft per quart, making it perfect for residential, commercial, and industrial applications.

Specifications

ASIN	B00K7FEQPI
Age Range Description	Adult
Best Sellers Rank	#10,704 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #11 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 (4,443)
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 ml
Item Weight	0.09 kg
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 Fluid Ounces
Warranty Description	Warranty
Water Resistance Level	Water Resistant

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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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