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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Rust-Oleum ZINSSER 276087 Mold Killing Primer Quart

Product ID: 285994699

Details

Brand
Zinsser
Colour
white
Finish type
Matte
Item volume
946.35
Size
Quart

🎨Covers 100-112.5 sq. ft. per quart

⏱️Dries in 4 hours, recoats in 1 hour

🛡️Kills mold & mildew effectively

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₨1693

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Sold byAmazon SeychellesDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🛡️ Mold’s worst nightmare, your home’s best defense!

ECO SMART SAFE 🌿 - Water-based with low VOC (100 g/L) for a safer, odorless application that’s kinder to your indoor air quality.
FAST TRACK FINISH ⏱️ - Dries to a matte finish in just 4 hours with a quick 1-hour recoat time—get your project done faster without compromise.
MOLD ANNIHILATOR 🛡️ - Powerful acrylic formula that kills mold and mildew on contact, protecting your space from recurring issues.
VERSATILE APPLICATION 🏠 - Ideal for metal, wood, and all indoor surfaces—perfect for professionals who demand reliable, multi-surface performance.
BROAD SURFACE COVERAGE 🎨 - One quart covers up to 112.5 sq. ft., making it efficient for both small touch-ups and larger indoor projects.

Zinsser 276087 Mold Killing Primer is a US-made, water-based acrylic primer designed to kill mold and mildew while providing excellent stain blocking. It dries quickly with a matte finish, covers up to 112.5 sq. ft. per quart, and is suitable for indoor use on multiple surfaces including metal and wood. Low VOC and easy soap-and-water cleanup make it a professional-grade, eco-conscious choice for mold prevention and surface preparation.

Specifications

ASIN	B00K7FEQPI
ASIN	B00K7FEQPI
Best Sellers Rank	#2,350 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #1 in Primer Paint
Brand Name	Zinsser
Color	white
Color Code	#FFFFFF
Container Type	Pail
Coverage	100-112.5 sq. ft.
Customer Reviews	4.4 4.4 out of 5 stars (3,064)
Customer reviews	4.4 4.4 out of 5 stars (3,064)
Date First Available	9 June 2014
Dry Time In Hours	4
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 Volume	946.35 Milliliters
Item Weight	0.09 Kilograms
Item model number	276087
Model Name	Zinsser 276087 Mold Killing Primer, Quart, White
Model Number	276087
Paint Type	Acrylic
Part Number	276087
Product Dimensions	22.35 x 22.35 x 13.46 cm; 90 g
Size	Quart
Special Features	Kills mould and mildew
Specific Uses For Product	Interior
Surface Recommendation	Metal, Wood
UPC	020066238032
Unit Count	32 Fluid Ounces
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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