How thick should kilz be applied?

Author: Alexandrine Boehm  |  Last update: Monday, January 12, 2026

Kilz should be applied at about 4.6 mils thick wet, you can learn how to check wet mil thickness in our guide here. Coverage for brush or rolling is 300 to 400 Sq feet per gallon.

How many coats of KILZ primer should I use?

Typically, you only have to apply one or two coats of primer to achieve optimal results for which it is intended. One common misconception is that you need to continue to apply coats of primer until you completely cover the surface in a white finish or hide every area possible like you would do a paint.

Is KILZ primer supposed to be thin?

Apply as supplied using a brush, roller or sprayer. Do not thin. Stir thoroughly before and occasionally during use.

Should primer be thick or thin?

Primer should be thin and applied thinnly. The can should tell you how to thin it down, and also what thinner to use.

How long should KILZ dry before painting?

Dries to the touch in 30 minutes. Can be recoated or topcoated in one hour with latex or oil-based paint. Application at lower temperatures, in high humidity or in poorly ventilated areas will affect dry time.

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Do I need to sand after using Kilz primer?

Inspect and Sand: After drying, check for drips or rough spots, sanding lightly if necessary.

What happens if you paint over primer too soon?

It's recommended to wait at least 24 hours before adding a coat of paint over your primer. Painting over it soon could cause your paint to adhere to the wall improperly, flaking and peeling.

Can you wait too long to paint after priming?

Can You Wait Too Long to Paint After Priming? Generally speaking, you should paint within a couple of weeks after priming. Some primers can be left for up to 30 days, but that's pushing it.

Does Kilz primer need to be shaken?

Shake can vigorously for 1 minute after mixing ball begins to rattle and often during use.

What happens if you apply paint too thick?

Thick paint is harder to apply evenly. It may not spread smoothly, leading to an uneven coat with brush marks or roller streaks. This can affect the final appearance and texture of the painted surface.

Should kilz be thick?

Kilz should be applied at about 4.6 mils thick wet, you can learn how to check wet mil thickness in our guide here. Coverage for brush or rolling is 300 to 400 Sq feet per gallon.

Do you paint over kilz primer?

It's ready to brush, roll or spray and can be topcoated after one hour with latex or oil-based paint. Use KILZ STANDARD Primer on almost all interior surfaces including wood, drywall, plaster, brick, masonry and more.

How to dilute Kilz primer?

DO NOT THIN if using a roller or brush; however, if using a sprayer and thinning is required, thin with water at a ratio of no more than 8 oz.

Should I sand after primer?

After the primer dries, lightly sand away bumps and ridges using very fine grit sandpaper folded into quarters. When the grit of one section of sandpaper becomes covered with dust, switch to an unused section and continue. Wipe the wall clean with a damp towel or sponge and allow it to dry before painting.

Will Kilz stop peeling paint?

Over time, fluctuating temperatures and humidity levels can make paint peel. For spaces where this is normal like kitchens, using KILZ 3® Premium Primer (known for its exceptional adhesion and durability) before you paint can help ensure your paint job lasts longer.

What precautions should be taken when using Kilz primer?

Prior to applying the primer, remove any mold or mildew with a proper remover or have it removed by a professional. In severe cases, the moldy substrates may need to be replaced. Once the surface is mold and mildew free, ensure it is clean and dry before applying primer.

What causes Kilz to bubble?

There are a lot of reasons that a film could bubble. It really depends if you are painting over a water- or oil-based coating. The surface could have moisture trying to escape that is pushing the film up. It could also be a solvent that is on the surface.

What are the side effects of Kilz primer?

Causes serious eye irritation. Harmful if inhaled. May cause respiratory irritation, drowsiness or dizziness.

Does the primer coat have to be even?

Primer doesn't need to look perfect but try your best to apply even coats of primer on a surface for best results.

How long between coats of Kilz 2?

Allow 2 hours dry time*, then apply second coat.

Can you leave primer unpainted for a week?

Some might only be good for 7 – 14 days. For example, oil-based primers tend to be more durable than water-based or latex primers. So you need to check the primer data sheet. That said, it should be ok for a couple of months if it's somewhere interior and it isn't exposed to sunlight or the other elements.

Why is my paint peeling after priming?

Incorrect Paint or Primer

Specific primers are designed to be used with different kinds of paints, so using the wrong primer can also lead to peeling.

How long should kilz primer dry before painting?

Dry Time @ 77°F (25°C) / 50% RH: Touch in 30 minutes. Paint in 1 hour.

Can I paint 1 hour after primer?

But for best results, don't paint until the primer completely dries—which can take up to 3 hours, depending on temperature and humidity. Once the primer is completely dry, it's prime time for painting.

Is it better to primer twice or paint twice?

You will want to use 2-3 coats of primer to ensure there is a good bond between the new paint and the wall, and also to cover up any previous colors, especially if they are red, orange, or a strange outdated color. In short, you will typically need 2 coats of primer for most painting projects.

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