Is there a paint or primer that kills mold?

Author: Sammy Schumm  |  Last update: Monday, September 22, 2025

Zinsser Mold Killing Primer is a water-based EPA registered fungicidal protective coating that can be used to paint over and kill all existing mold, mildew, moss, fungi, odor causing bacteria and any other fungal organisms. It prevents the growth of mold, mildew and other fungal organisms on the paint film.

Does mold killing primer actually work?

Mold-killing primer paint can help inhibit the growth of mold and mildew on surfaces, but it does not ``kill'' existing mold. Instead, it creates a barrier that prevents mold spores from growing and spreading. Here are some key points to consider:

What kills 100% of mold?

Hydrogen peroxide, commonly used to disinfect wounds, is active against a wide variety of micro-organisms including mold. It acts by releasing oxygen at a rapid rate, which kills mold by oxidizing the surface and breaking down proteins and DNA.

What paint primer kills mold?

A popular choice is Zinsser Mold Killing Primer, which is formulated to prevent mold and mildew growth. This type of primer not only covers stains but also contains fungicides that kill existing mold spores and prevent new ones from growing.

What is the best paint to get rid of mold?

Mold only needs moisture and cellulose to live. Alkyd paints trap the moisture so the mold can thrive. The alcohol shellac and waterborne paints allow the wall to breathe. Waterborne paints are made with components that typically kill mildew and inhibit the growth of mold.

How to Paint over Mould & Mildew

What happens if you paint over mold with Kilz?

If the moldy surface is not properly cleaned before priming with KILZ® Mold & Mildew, it will likely continue to grow underneath the paint and eventually come back out through paint that cracks or peels or through the back of the wall or surface, especially if it remains damp or wet.

How many coats of Zinsser mold killing primer?

Customers say the Zinsser Mold Killing Primer is effective in covering and preventing mold, with many noting its ease of application and quick drying time. Users appreciate its low odor and good coverage, often achieving satisfactory results with just one coat.

Can you prime and paint over mold?

Expert Tip: If you have mold on your walls , do not paint over it. This will only cause it to grow more underneath the paint. Instead, get rid of the mold before priming and painting.

Which is better, Kilz or Zinsser?

Original Kilz Primer allowed more seep through when put in two coats to two different walls in the same area, whereas Zinsser provided superior coverage.

Does anti-mold paint really work?

While mould-resistant paint will prevent mould in moisture-prone areas of the home such as bathrooms, kitchens and areas of condensation, it will not solve damp problems and will not dry wet walls or surfaces. The only way to cure a damp problem is to carry out a full damp proofing course and fully treat the surface.

What is the strongest mold killer?

Our Top Picks
  • Best Overall: SALE. ...
  • Best Fast Acting: RMR-86 Instant Mold and Mildew Stain Remover at Amazon $17. ...
  • Best Preventative: Mold Armor Mold Blocker at Amazon $11. ...
  • Best Eco-Friendly: CLR Mold & Mildew Stain Remover at Amazon $12. ...
  • Best Gel: Skylarlife Mold & Mildew Remover Gel at Amazon $15.

How to permanently get rid of mold?

Take care to protect yourself by wearing eye protection, gloves, and a facemask, if necessary, and test the product in a small area first before continuing. Mix one part bleach to four parts water. Wipe and gently scrub the mould until it is gone.

What are signs of mold sickness?

Although symptoms can vary, the most common symptoms seen in people exposed to mold indoors include:
  • Nasal and sinus congestion.
  • Eye irritation, such as itchy, red, watery eyes.
  • Wheezing and difficulty breathing.
  • Cough.
  • Throat irritation.
  • Skin irritation, such as a rash.
  • Headache.

When can I paint over Zinsser mold killing primer?

Mold Killing Primer dries to the touch in 30 minutes and can be recoated in 1 hour. For optimal protection, apply topcoat within 72 hours of application. Full adhesion and hardness develops in 7 days.

What is the best primer for moldy walls?

What is the best anti mould paint primer? Zinsser Cover Stain Primer is a great stain-blocking primer that will cover unsightly mould and mildew stains with ease.

What do you spray on mold before painting?

Zinsser Mold Killing Primer is an EPA registered, water-based fungicidal protective coating that kills existing mold, mildew, moss, fungi, and odor-causing bacteria. It works effectively under any type of coating and is ideal for use with ZINSSER Perma-White.

Which kilz is best for mold?

KILZ® MOLD & MILDEW Primer is a water based primer-sealer-stainblocker that is specially designed for residential surfaces in high humidity, moisture and temperature environments such as kitchens, bathrooms, powder rooms and laundry rooms.

How many coats of Zinsser primer should I use?

Thoroughly mix to ensure any settled pigment is re-dispersed before using. In most cases only one coat is necessary to prime most surfaces.

Is Kilz 3 worth it?

Customers say Kilz 3 Premium Primer is a reliable choice for covering stains and preparing surfaces for painting.

Is there a primer that kills mold?

Water-based Mold Killing primers serve as an alternative to solvent-based Mold Killing primers. If you're looking for a quick-drying Mold Killing primer, this is a great option. Since it's water-based, this Mold Killing primer can be easily removed from paint brushes.

How to make sure mold doesn't come back?

Indoor mold growth can and should be prevented or controlled by controlling moisture indoors. If there is mold growth in your home, you must clean up the mold and fix the water problem. If you clean up the mold, but don't fix the water problem, then, most likely, the mold problem will come back.

What paint kills black mold?

Zinsser Mold Killing Primer is a water-based EPA registered fungicidal protective coating that can be used to paint over and kill all existing mold, mildew, moss, fungi, odor causing bacteria and any other fungal organisms. It prevents the growth of mold, mildew and other fungal organisms on the paint film.

Which Zinsser is best for mold?

Zinsser PermaWhite® Interior Satin - A scrubbable, satin finish recommended for high-humidity areas where a higher sheen level is required. Tough and scrubbable, PermaWhite® is the best mould resistant paint for high moisture areas like bathrooms, kitchens, laundry rooms and finished basements.

What dissolves mold?

Chemical or Natural Mold Cleaners
  • Use undiluted white vinegar on hard surfaces in kitchens and baths. Apply it directly to the mold.
  • Make a bleach solution to kill mold. Mix one cup of bleach in a gallon of water. ...
  • Mix a 50/50 solution of ammonia and water. Spray on the surface.

Do I need to sand if I use Zinsser primer?

Zinsser Bulls Eye is a 'bond coat' primer that's great for hard-to-stick surfaces as it offers excellent adhesion without sanding. It dries to a smooth, tight, water-resistant film that is perfect for painting over with your chosen topcoat.

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