
KILZ Mold & Mildew Primer is a water-based primer designed for residential surfaces in high humidity, moisture, and temperature environments. It is ideal for interior and exterior spaces prone to high moisture and humidity, such as bathrooms, kitchens, and laundry rooms. While it is designed to be applied directly to mold and mildew-prone surfaces, it is important to ensure that any existing mold or mildew is removed before priming and painting to ensure the best results. Painting directly over mold and mildew is not recommended as it will likely continue to grow underneath the paint and can cause health issues.
| Characteristics | Values |
|---|---|
| Purpose | Prevent mold and mildew growth on the primer film/primer surface |
| Application | Interior and exterior spaces prone to high moisture and humidity, such as bathrooms, kitchens, and laundry rooms |
| Surface Preparation | Remove any existing mold or mildew with a remover or by a professional. Wash, rinse, and dry the surface before priming |
| Application Method | Brush, roller, or sprayer |
| Drying Time | Dries to the touch in 30 minutes at 77°F (25°C) and 50% humidity. Recoat or topcoat after 1 hour |
| Stain Blocking | Medium level stain blocker. Prevents stains like pen, marker, grease, nicotine, water, and light tannin bleed |
| Tinting | May be tinted with up to 2 ounces of universal colorant per gallon. Tinting to a lighter shade than the topcoat is recommended |
| Coverage | 300-400 sq. ft. (27.87-37 m2) per gallon depending on application method and surface porosity |
| Cleanup | Clean equipment and paint spatters with warm, soapy water or mineral spirits |
| Disposal | Do not dispose of this product down a drain. Donate unused product. Contact local household refuse collection service for recycling or disposal information |
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What You'll Learn
- KILZ Mold & Mildew Primer is not meant to be applied directly to mould
- Surfaces must be cleaned, dried, and free of mould before priming and painting
- KILZ contains an EPA-certified mildewcide to prevent mould growth
- KILZ is ideal for interior and exterior spaces prone to high moisture
- KILZ is a water-based primer-sealer-stain blocker

KILZ Mold & Mildew Primer is not meant to be applied directly to mould
KILZ Mold & Mildew Primer is a water-based primer-sealer-stain blocker designed for residential surfaces in high humidity, moisture and temperature environments. It is ideal for interior and exterior spaces prone to high moisture and humidity, such as bathrooms, kitchens, laundry rooms, powder rooms, patio kitchens, pool decks, greenhouses, and more.
The primer contains an EPA-certified mildewcide that prevents mold and mildew growth on the primer film. It is designed to be applied directly to mold and mildew-prone surfaces, but it is important to note that any existing mold or mildew must be removed before priming and painting. This is because mold is a living organism that thrives in a moist environment, so painting or priming over it will not kill it. Instead, it will likely continue to grow underneath the paint and eventually come back out through paint that cracks or peels. Therefore, it is crucial to ensure that the surface is clean, dry, and free of mold, mildew, dust, chalk, oil, grease, wax, polish, loose or peeling paint, rust, and all other foreign substances before applying the primer.
To remove mold or mildew from the surface, use a proper remover or hire a professional. In severe cases, the moldy substrates may need to be replaced. Once the surface is mold and mildew-free, you can apply the primer using a brush, roller, or sprayer. KILZ Mold & Mildew Primer dries to the touch in 30 minutes at 77°F (25°C) and 50% humidity, and you can recoating or topcoat after 1 hour.
It is important to note that KILZ Mold & Mildew Primer is not a finish coat, and a topcoat of paint is required after priming. This primer also has a high-hiding white finish that hides previous colors, stains, graffiti, and other marks and blemishes. It will also block most medium to heavy stains, including felt marker, grease, ink, pencil, tannin, and water stains.
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Surfaces must be cleaned, dried, and free of mould before priming and painting
To prepare a surface for priming and painting, it should first be washed with a mildew remover and then rinsed with water. After this, the surface should be allowed to dry before priming. It is important to note that the KILZ® MOLD & MILDEW Primer is designed to be applied directly to mould and mildew-prone surfaces, but any existing mould and/or mildew on the surface should be removed before priming and painting to ensure the best results.
In addition to being clean and dry, surfaces must also be free of dust, chalk, oil, grease, wax, polish, loose or peeling paint, rust, and all other foreign substances. This is important to ensure proper adhesion of the primer and paint and to achieve the desired finish. Failure to properly prepare the surface may result in poor paint adhesion, an uneven finish, or other issues that may affect the overall appearance and durability of the paint job.
It is also worth noting that if you are working with old paint, you may release lead dust, which is toxic and can cause serious illness, such as brain damage, especially in children. Pregnant women should also avoid exposure to lead dust. Therefore, it is important to take the necessary precautions, such as wearing a respirator, to protect yourself and others from potential health risks associated with lead exposure.
Overall, it is crucial to follow the proper surface preparation steps, including cleaning, drying, and ensuring the surface is free of mould and other contaminants, to achieve the best results when using the KILZ® MOLD & MILDEW Primer and to maintain a healthy living environment.
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KILZ contains an EPA-certified mildewcide to prevent mould growth
KILZ® Mold & Mildew Primer is a water-based primer-sealer-stain blocker that is designed for residential surfaces in high humidity, moisture and temperature environments. It is ideal for interior and exterior spaces prone to high moisture and humidity, such as bathrooms, kitchens, laundry rooms, and pool decks.
By following these steps, KILZ helps ensure that the primer coat and primed surface are mildew and mould-free, preventing the growth of mould and mildew on the primer film. This product will also block most medium to heavy stains, including felt marker, grease, ink, and water stains.
It is important to note that KILZ is not meant to be applied directly to mould, especially black or yellowish, wet, and slimy mould. In such cases, proper health protective measures should be taken, and the mould should be removed with quality mould-removing products or by a professional before applying the primer and paint.
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KILZ is ideal for interior and exterior spaces prone to high moisture
KILZ Mold & Mildew Primer is ideal for interior and exterior spaces prone to high moisture and humidity. It is designed for residential surfaces in high humidity, moisture, and temperature environments. KILZ is perfect for spaces like bathrooms, kitchens, laundry rooms, powder rooms, patio kitchens, pool decks, and greenhouses.
KILZ Mold & Mildew Primer contains an EPA-certified mildewcide that prevents mold and mildew growth on the primer film. It is crucial to ensure that the surface is clean, dry, and free of mold, mildew, and other substances before applying the primer. Once the surface is prepared, KILZ can be easily applied using a brush, roller, or sprayer.
KILZ offers excellent adhesion to both interior and exterior surfaces and serves as a sound anchor for paints. It is a water-based primer-sealer-stain blocker that blocks most medium to heavy stains, including felt markers, grease, ink, pencil, tannin, and water stains. It is also effective at hiding previous colors, stains, graffiti, and other marks and blemishes.
For maximum adhesion on glossy surfaces, it is recommended to scuff sand the surface before applying KILZ. If there is peeling or checked paint, scrape off the loose paint and sand to a smooth surface. KILZ can be tinted with up to 2 ounces of universal colorant per gallon, and it dries to the touch in 30 minutes at 77°F (25°C) and 50% humidity.
Overall, KILZ Mold & Mildew Primer is an excellent choice for spaces prone to high moisture, providing effective protection against mold and mildew growth while also offering superior stain-blocking and adhesion properties.
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KILZ is a water-based primer-sealer-stain blocker
KILZ is a fast-drying, low-odor, very low VOC formula that is easy to clean with soap and water. It has excellent adhesion to both interior and exterior surfaces and provides a sound anchor for paints. The EPA-registered active ingredient creates a mold and mildew-resistant film that protects the primer film from mold and mildew growth.
KILZ is not meant to be applied directly to mold, especially black or yellowish, wet, or slimy mold. Instead, it should be applied to surfaces that are clean, dry, and free of mold and mildew. It is important to ensure that the surface is mold and mildew-free before the primer and topcoat paint is applied.
KILZ will block most medium to heavy stains, including felt marker, grease, ink, pencil, tannin, and water stains. It also has a high-hiding white finish that can hide previous colors, stains, graffiti, and other marks and blemishes.
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Frequently asked questions
No, it is not supposed to be applied directly to mold. The mold must be removed before priming and painting.
Wash the area with a mildew remover, rinse with water, and allow the surface to dry before priming.
The mold will likely continue to grow underneath the paint and come back out through cracks in the paint or through the back of the wall or surface.


















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