10 Best Mildew Resistant Paints 2026 in the United States

The Armor SX5000 WB is a water-based silane siloxane sealer designed mainly for concrete, brick, pavers, and natural stone surfaces. While not a traditional mildew-resistant paint, it offers excellent mildew protection by reducing water absorption by up to 95%, which helps prevent mildew growth and other moisture-related damage. Because it penetrates below the surface rather than forming a visible coating, it won’t change the look, color, or texture of your surfaces—perfect if you want protection without altering appearance.

This sealer is easy to apply with a pump sprayer, covers around 175-225 square feet per gallon, and dries without any unpleasant odor thanks to its zero VOC, water-based formula. Maintenance is simple since it doesn’t create a surface film; when needed, you just reapply a coat. The protection lasts for 7 to 10 years, guarding against cracking, staining, and damage from ice or salt.

One limitation is that this product does not provide a paint-like finish or color options as it’s clear and transparent. It’s best suited for outdoor masonry or stone surfaces rather than wood or metal. Also, while drying time isn’t specifically stated, water-based sealers usually dry relatively quickly but may require proper surface preparation and clean-up with soap and water. If you’re looking for a durable, low-maintenance sealer that keeps your masonry surfaces dry and mildew-free without changing their look, Armor SX5000 WB is a strong choice. However, if you want a mildew-resistant paint that adds color or a visible finish, this product won’t meet those needs.

The Zinsser 276087 White Mold Killing Primer is a water-based mildew-resistant primer designed to kill and prevent mold, mildew, and other fungal organisms on both interior and exterior surfaces. It has strong mildew resistance due to its EPA-registered antimicrobial formula, which eliminates existing mold and odor-causing bacteria while helping to stop future growth. This makes it a good choice if you need a reliable base layer on surfaces like masonry and metal. The primer has a matte finish and is water-resistant but not fully waterproof, making it best for areas that don’t get heavy water exposure.

It covers about 32 square feet per quart, which is average for a primer, and dries quickly to the touch in 30 minutes, allowing you to recoat within an hour—helpful for faster project completion. Being water-based, it has low odor and cleans up easily with soap and water, which is convenient and safer for indoor use. The white color works well under most topcoats, pairing especially well with Zinsser Perma-White. The pack of three quarts offers good value for larger projects.

This primer is a strong protective base option if you’re dealing with mold issues and want to paint over treated surfaces. Since it is a primer, a topcoat is still necessary for the final look and durability.

The Zinsser 2770 PERMA-WHITE Mold & Mildew Proof Interior Paint is specifically crafted for indoor use, offering strong mildew resistance thanks to its built-in mildewcide. This protection lasts up to five years, making it a reliable option for areas prone to mold and mildew growth, like bathrooms and kitchens. Being a water-based paint, it is easy to work with and clean up.

The eggshell white finish provides a subtle sheen that is both durable and washable, which is great for maintaining a clean look over time. One of its standout features is the extensive coverage of up to 2000 sq. ft., making it a cost-effective choice for larger spaces. Additionally, the paint’s low VOC levels make it a safer option for indoor environments, reducing concerns about harmful fumes during application and drying. It dries relatively quickly, allowing you to complete your painting projects efficiently.

However, the paint is quite heavy, with the 5-gallon can weighing over 60 pounds, which might be cumbersome to handle for some users. The price point may be a bit higher compared to other interior paints, but the long-term durability and mildew resistance can justify the investment. This paint is ideal for anyone needing a durable, mildew-resistant solution for their interior spaces, with excellent coverage and a user-friendly application process.