10 Best Mold Killers 2025 in the United States

The Concrobium 25326CAL Mold Control Spray is designed to eliminate mold, mildew, and musty odors, and prevent regrowth. One of its key strengths is its EPA-registered formula that crushes mold spores as it dries, creating an invisible barrier to prevent future mold growth. The solution is odorless and contains no bleach or harsh chemicals, making it safe to use on a wide range of surfaces without causing damage. This makes it particularly suitable for those who need a mold killer that is safe for indoor use and won't leave a chemical smell.

Additionally, the application is straightforward – simply spray the affected area and let it dry, with no scrubbing or rinsing required, which can save time and effort. A single 32 oz bottle can cover between 80-110 square feet, making it efficient for medium-sized areas. There are some drawbacks. While it is effective, users may need to apply it multiple times in heavily mold-infested areas to see significant results. Also, although it's generally safe, it's always wise to test it on a small, inconspicuous area first to ensure surface compatibility, especially on delicate materials.

The Concrobium 27400CAL Mold Control Aerosol is a handy solution for eliminating mold, mildew, and musty odors, while also preventing their regrowth. Its active ingredients form an EPA-registered, odorless formula that crushes mold spores and leaves an invisible barrier. This product stands out because it contains no bleach or harsh chemicals, making it safe for use on various surfaces without risking damage.

Application is straightforward: just spray on the affected area and let it dry—no scrubbing or rinsing needed. Each 14 oz. can covers between 100-150 sq. ft., making it suitable for small to medium-sized spaces. However, one downside is that it is not a stain remover, so any visible mold stains will require a separate cleaning product.

Despite this, the lack of odor and ease of use are major plus points, and it’s ideal for both amateur and professional use inside your home. For those looking for a safe and effective way to manage mold without harsh chemicals, this aerosol could be a good fit.

The RMR-86 Instant Mold and Mildew Stain Remover Spray offers a convenient solution for removing mold and mildew stains without the need for scrubbing. One of its strengths is its versatility, as it can be used on multiple surfaces including wood, vinyl siding, drywall, and concrete. This makes it suitable for various areas in and around the home. The fast-acting formula is another plus, as it targets deeply embedded stains and begins working instantly. Users will also appreciate the fresh scent, which helps to neutralize unpleasant odors associated with mold and mildew.

However, there are some considerations to keep in mind. The product requires proper ventilation and personal protective equipment (PPE) during application, indicating that it may have strong chemicals which could be a concern for those with sensitivities or allergies. While the no-scrubbing feature is convenient, frequent applications might be necessary for persistent mold issues.

RMR-86 is a strong candidate for those looking for a quick and easy mold stain remover across various household surfaces, but users should take appropriate safety precautions during use.