10 Best Interior Primer 2025 in the United States

The qt Zinsser 276087 White Mold Killing Primer stands out for its ability to kill existing mold, mildew, and odor-causing bacteria, making it an excellent choice for spaces prone to moisture and mold issues. It works on a variety of surfaces, including masonry and metal, and can be used both indoors and outdoors, offering versatility. One of its standout features is that it allows you to paint directly over mold, saving time and effort in preparation.

The primer is water-based, which generally means easier cleanup and lower odor compared to oil-based primers. Additionally, it's EPA registered, which adds an extra layer of trust regarding its effectiveness and safety standards. The matte finish provides a non-glossy surface which can be ideal for further painting or as a final look for some applications.

While it binds well to chalky surfaces, masonry, and metal, it might not be the best choice for other surfaces like wood or drywall without additional preparation. The product also comes in a relatively small size of 32 fluid ounces, so for larger projects, multiple units would be necessary, potentially increasing cost. Despite being water-based, which helps with lowering VOC levels, it's always good to check the specific VOC content if odor and environmental safety are primary concerns. This primer is a strong candidate for those looking to tackle mold and mildew effectively, especially in areas where moisture is a problem, but users should be aware of its limitations on certain surfaces and project sizes.

The KILZ Restoration Primer is a versatile interior primer, sealer, and stain blocker, ideal for various restoration and disaster recovery painting jobs. Its water-based, modified acrylic epoxy formula offers the strong adhesion and performance of traditional oil and shellac-based primers, with the added benefits of low odor and easy clean-up. This primer works well on multiple surfaces, including drywall, wood, plaster, masonry, brick, painted metal, ceramic tile, and glass, making it highly adaptable for different projects.

It effectively blocks tough stains and odors, which is particularly useful for homes with pets or previous damage, and it dries quickly, being ready for recoat or topcoat in just one hour. However, its water-based nature may not be as effective as oil-based primers in extreme conditions or on very stubborn stains. The primer provides superior coverage, with each 5-gallon pail covering approximately 1,500-2,000 square feet.

Despite its weight of 61 pounds, its performance and ease of use can outweigh the inconvenience. Trusted by professionals for nearly 50 years and backed by a lifetime limited warranty, this primer is a reliable choice for interior projects. Those with sensitivities might want to consider the low but present VOCs and odor.