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Stain Blocking

Mold Resistant

Odor Blocking

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Zinsser Mold Blocking Interior Multi-purpose Oil-based Wall and Ceiling Primer ( Spray can )

Name: Zinsser Mold Blocking Interior Multi-purpose Oil-based Wall and Ceiling Primer ( Spray can )
Brand: Zinsser
SKU: 5014436605
Rating: 4.7 (94 reviews)

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4.7

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Package Quantity: 6

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Zinsser Mold Blocking Primer Spray is an EPA Registered protective coating that can be used to paint over and block all existing mold, mildew, moss, fungi, odor causing bacteria and any other fungal organisms. Prevents future growth of mold and mildew on the paint film, Blocks stains and odors. It is for use on non-porous interior and exterior surfaces.

Can be painted directly over fungal organisms, odor causing bacteria, mold and mildew for stain and odor blocking
Perfect for residential and commercial applications on non-porous surfaces in bathrooms, attics, basements and more
EPA-registered formula is ideal for interior/exterior small projects and touch ups to block existing mold and mildew
Great for use under any topcoat and is ideal with Zinsser perma-white
Convenient spray great for small projects and touch-ups
Dries to touch in minutes, top coat in 30-minutes
For ideal protection, top coat no more than 72- hours after application
Clean up with mineral spirits

General
Series Name	Mold Blocking	Use Location	Interior/Exterior
Sub-Brand	Mold Blocking	Unit of Measure Quantity	13
Type	Multi-purpose	Unit of Measure	Ounce(s)
Base Material	Oil-based	Application Method	Paint sprayer
Package Quantity	6	Shake Can Before Use	Yes

Dimensions
Container Size	Spray can	Maximum Coverage Area (Sq. Feet)	10

Features
Dry Time Indicator	Yes	Odor Blocking	Yes
Dry to Touch	20 minutes	Rust Resistant	No
Low VOC	No	Stain Blocking	Yes
Mildew Resistant	Yes	Tintable	No
Mold Killing	Yes	Zero VOC	No
Mold Resistant	Yes

Certifications
CA Residents: Prop 65 Warning(s)	Prop 65 WARNING(S) -	GREENGUARD Gold Certified	No
CARB Compliant	No	SCAQMD Compliant	No

Warranty
Warranty	None

Compatibility
For Use on Metal	Yes	For Use on Brick	No
For Use on Wood	Yes	For Use on Stucco	No
For Use on Drywall	Yes	For Use on Cabinets	Yes
For Use on Glass	No	For Use on Plaster	No
For Use on Walls and Ceilings	Yes	For Use on Tile	Yes
For Use on Concrete/Masonry	No

Miscellaneous
UNSPSC	31211500

Check out the Best Selling Primer on Lowes.com

Review

4.7 out of 5

94 Reviews

2 Star

96% Recommend this product

Ratings may include incentivized customer reviews.

What Customers Are Saying

Customers overwhelmingly praise this mold-killing primer for its exceptional ability to eliminate and prevent mold regrowth in high-moisture areas like bathrooms and basements. Many report that mold previously returning repeatedly has not reappeared for weeks or months after application. Reviewers consistently highlight outstanding stain coverage—often with just one coat—that hides severe water damage and mold discoloration. Customers appreciate the smooth application, quick drying time, mild odor, and easy water cleanup. A few mention preferring a spray version for hard-to-reach areas, and some suggest a second coat for heavily stained surfaces. Overall, reviewers strongly recommend the product for reliable mold prevention and stain coverage.

Customer review summary generated by AI, including incentivized reviews.

94 Customer Reviews

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Excellent product

Would Recommend

It’s so easy to apply and yes it works. This is much faster than the paint and brush. It doesn’t have a smell so I sprayed inside on some areas. It dries super quick.

stinsley85September 20, 2026
From Mold Blocking Interior Multi-purpose Oil-based Wall and Ceiling Primer ( Spray can ) Verified Purchaser

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No flock cameras on your property

Would Recommend

Get rid of the flock cameras at your stores!!!!!

AnnoyedAugust 26, 2026
From Mold Blocking Interior Multi-purpose Oil-based Wall and Ceiling Primer ( Spray can ) Verified Purchaser

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Response from Rust-OleumSupport

Thank you for rating Rust-Oleum Zinsser Mold Blocking Primer. Please contact your local store directly to provide your feedback on this.
— Rust-... Read More

Rust-OleumSupportAugust 26, 2026

Rustoleum

It covered the stain in my pantry ceiling!

Would Recommend

It worked for the problem I had, but the odor was very strong. And I was glad it came in white, which made the choice to purchase easier.

LewisJune 22, 2026
From Mold Blocking Interior Multi-purpose Oil-based Wall and Ceiling Primer ( Spray can ) Verified Purchaser

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COMPARE PRODUCTS

		Name	Current Item ZinsserMold Blocking Interior Multi-purpose Oil-based Wall and Ceiling Primer ( Spray can )
		Ratings	94
		Stain Blocking
		Type	Multi-purpose
		For Use on Walls and Ceilings
ZinsserStain Killing Interior Multi-purpose Water-based Wall and Ceiling Primer ( 1-quart )	ZinsserBIN Interior Multi-purpose Shellac Wall and Ceiling Primer ( Spray can )	ZinsserCover Stain Interior Multi-purpose Oil-based Wall and Ceiling Primer ( Spray can )	ZinsserCover Stain Interior Multi-purpose Oil-based Wall and Ceiling Primer ( Spray can )	ZinsserBIN Interior Multi-purpose Oil-based Wall and Ceiling Primer ( Spray can )	ZinsserBulls Eye 1-2-3 Gray Interior Multi-purpose Oil-based Wall and Ceiling Primer ( 26-oz )	XIM400 Interior Multi-purpose Oil-based Wall and Ceiling Primer ( 1-quart )	ZinsserMold Killing Interior Multi-purpose Water-based Wall and Ceiling Primer ( 1-gallon )	ZinsserBulls Eye 1-2-3 Interior Multi-purpose Water-based Wall and Ceiling Primer ( 1-gallon )
47	114		69	4	36		322	166

Multi-purpose	Multi-purpose	Multi-purpose	Multi-purpose	Multi-purpose	Multi-purpose	Multi-purpose	Multi-purpose	Multi-purpose