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 287512 Molding Blocking Spray Primer, 13 oz, White

Product ID: 601708247

Details

Brand
Zinsser
Colour
White
Finish type
Matte
Item volume
13 Fluid
Size
13.00 Ounce of

🎯Covers 8-10 sq. ft. per 13 oz

⏱️Dries to touch in 5 minutes

🛡️EPA-registered antimicrobial shield

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10764 som

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Sold byAmazon KyrgyzstanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🛡️ Seal out mold, speed up your project, and breathe easy with Zinsser’s powerhouse primer!

FAST DRY FORMULA - Touch dry in just 5 minutes and ready for recoating within 30 minutes—perfect for quick, efficient projects.
FUNGICIDAL PROTECTION - Provides a durable fungicidal barrier that covers fungal stains and prevents future microbial growth.
MOLD MILDEW BLOCKER - EPA-registered primer that halts mold, mildew, and odor-causing bacteria growth without heavy pre-cleaning.
WATER BASED LOW ODOR - Eco-friendly, easy soap-and-water cleanup with minimal fumes—ideal for indoor and outdoor use.
VERSATILE SURFACE ADHESION - Bonds seamlessly to chalky siding, masonry, metal, and under any topcoat, especially Zinsser Perma-White.

Zinsser Rust-Oleum 287512 Molding Blocking Spray Primer is a 13 oz water-based, EPA-registered antimicrobial primer designed to block mold, mildew, and odor-causing bacteria. It dries to the touch in 5 minutes, covers 8-10 sq. ft., and is low odor for easy indoor/outdoor use. Ideal for prepping surfaces like metal, masonry, and siding before topcoating, it ensures a clean, protected finish with quick recoat times.

Specifications

ASIN	B08TT9XWP5
ASIN	B08TT9XWP5
Age Range Description	Adult
Best Sellers Rank	#17,715 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #16 in Primer Paint
Brand Name	Zinsser
Color	White
Color Code	#FFFFFF
Container Type	Aerosol Can
Coverage	8-10 sq. ft./13 oz
Customer Reviews	4.6 4.6 out of 5 stars (864)
Customer reviews	4.6 4.6 out of 5 stars (864)
Date First Available	10 January 2024
Department	Unisex-Adult
Finish Type	Matte
Full Cure Time	5 Minutes
Included Components	Spray
Is Waterproof	False
Item Form	Liquid
Item Type Name	Zinsser Mold Killing Primer
Item Volume	13 Fluid Ounces
Item Weight	1 Pounds
Item model number	287512
Manufacturer	Rust-Oleum
Manufacturer	Rust-Oleum
Model Name	Zinsser Molding Killing Primer
Model Number	287512
Paint Type	Water-based
Part Number	287512
Product Dimensions	6.67 x 6.67 x 20 cm; 453.59 g
Size	13.00 Ounce (Pack of 1)
Special Features	water based
Specific Uses For Product	Interior
Surface Recommendation	Metal
UPC	020066295189
Unit Count	13 Ounce
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.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

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The product quality is outstanding. Exactly what I needed for my work.

1 month ago

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