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 160 sq ft per quart

🦠Kills mold & mildew effectively

⏱️Dries in just 1 hour

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Description

🛡️ The primer that doesn’t just cover mold—it kills it dead!

FAST DRY FORMULA - Matte finish dries in just 1 hour, so you can move forward with your project quickly.
STAIN COVERING POWER - Effectively hides fungal stains while preventing future growth—keep your space looking fresh.
TRUE MOLD ANNIHILATOR - Kills existing mold and mildew without tedious pre-cleaning—save time and stress.
EPA REGISTERED ASSURANCE - Backed by EPA registration for guaranteed antimicrobial performance and quality.
VERSATILE SURFACE PROTECTION - Ideal for residential, commercial, and industrial use on walls, metal, basements, and more.

Zinsser Mold Killing Primer is a water-based, EPA-registered fungicidal coating designed to kill existing mold, mildew, and odor-causing bacteria on a variety of surfaces. With fast 1-hour drying time and coverage of 160 sq ft per quart, it’s perfect for indoor and outdoor use in residential, commercial, and industrial settings. This primer not only prevents mold regrowth but also covers stubborn fungal stains, making it the go-to solution for professionals and homeowners who demand lasting protection and a pristine finish.

Specifications

ASIN	B00K7FEQPI
Age Range Description	Adult
Best Sellers Rank	#1,653 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #1 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 (4,484)
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	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
UPC	020066238032
Unit Count	32 Fluid Ounces
Warranty Description	Warranty
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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B/.81

Duties & taxes included

In stock

Sold byAmazon PanamaDelivered 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 Panama.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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