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 2700 PERMA-WHITE is an interior acrylic paint designed to resist mildew and mold, making it suitable for damp areas like bathrooms or basements. It features a satin white finish, offering a soft sheen that balances between shiny and matte, which helps to hide imperfections on walls. The paint is durable and washable, supported by a lifetime guarantee against mildew growth. Being self-priming, it bonds well to tough surfaces without the need for extra sanding or primer, saving time and effort.

One 5-gallon container covers up to 2,000 square feet, which is ideal for larger rooms or multiple rooms. It dries to a full cure in about 2 hours, allowing you to use the space again quickly. The finish leans more toward satin, providing a subtle glow rather than a flat look. This paint is best suited for interior wood surfaces and areas prone to moisture and mildew.

If you want a mildew-resistant paint that is easy to apply, durable, and suitable for humid indoor environments, Zinsser PERMA-WHITE is a reliable choice.