Home » Does KILZ Kill Mold? [Updated 2023]]

Does KILZ Kill Mold? [Updated 2023]]

Mold is a problem and it can be found in any state of elevation, weather, or humidity and it’s a very slippery substance to remove, especially with conventional products like bleach. So does Kilz kill mold? Or does kilz kill black mold? Let us dig deep and find out the truth hidden beneath!

What is KILZ?

KILZ mold spray is a product that is used to coat and seal wood, metal, and drywall. It can be used to cover mold, mildew, and stains on walls. The product was originally developed by Sherwin-Williams in the 1940s. 

KILZ comes in two different formulas: oil-based and latex-based.

  1. The oil-based formula is designed for use on exterior surfaces such as decks or fences. It should not be used inside because it can release volatile organic compounds (VOCs) into the air when applied and dried.
  2. The latex formula is designed for indoor use but should still be applied outside of living spaces if possible. This formula does not contain VOCs so it does not affect indoor air quality when used indoors.

So, does it really kill mold? Or will kilz kill the mold?

Despite the term being deceptive, mold is not actually “killed” by KILZ paint and primers. But it’ll stop the mold from growing. By covering the stained surface with an impenetrable internal barrier, the brand effectively eliminates the state’s ability to show through the final coat of paint. It contains various chemicals that help prevent mold from growing on the surface of the paint. The active ingredient in KILZ spray paint for mold is toluene diisocyanate, which prevents mold from growing by blocking the air flow necessary for mold growth.

Can you Paint Over Mold with Kilz?

Can you Paint Over Mold with Kilz?​

There is no paint that kills mold. You can paint over mold with Kilz, but you may have to do some work to get rid of the mold first.

The first thing you should do is clean the mold off by scraping it off or washing it away. Then wait until the area is completely dry before painting over it. The easiest way to do this is to make sure that there’s good ventilation in your home—you can open windows and doors for several hours after cleaning up the mold.

Once the area is dry and you’ve waited for a couple days, then you can go ahead and paint over the area with Kilz paint for mold.

Does Kilz also have Spray to Kill Mold?

Does Kilz also have Spray to Kill Mold?
  • Yes, Kilz does have spray to prevent not to kill mold. It is a very effective and easy-to-use solution for removing mold from your home. If you are thinking “can you spray kilz over mold?”, then yes, you can use Kilz spray paint over mold.
  • Kilz is a paint that you can use to cover over the mold. This is a great option if you don’t want to remove the mold but are looking for a quick way to cover it up. You will need to let the Kilz dry before painting over it, but after that it’s ready to go!
  • You’ll find that Kilz works best on surfaces that aren’t very porous, like wood or concrete. It will also work best if you apply multiple coats of Kilz and let each coat dry before applying another coat.

Things to consider:

  1. There are several things to consider when deciding whether or not to spray Kilz over mold.
  2. First, you should make sure that the surface is dry. Wet surfaces will not be able to absorb the sealer, and it will run right off of them. If there are any spots where water has gotten into the wall, you can wait for them to dry before applying the sealer.
  3. Next, you should make sure that there are no cracks in your walls or other areas where paint may have chipped off or peeled away. If there are cracks or chips in your walls, these will be exposed when you apply Kilz over mold. This could lead to more problems later on down the road.
  4. Finally, if you decide that spraying Kilz over mold is right for your situation, then we recommend using an oil-based primer first so that it adheres better and lasts longer than a regular primer would have done alone!


So, Does kilz kill mold? No, not all! In conclusion, KILZ is a popular mold and mildew stain remover solution. The truth is that KILZ may actually help prevent mold removal efforts, which makes it an unsuitable choice for mold removal.


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