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Whether you’re painting the living room or a patio table, applying a prep coat of primer to the surface can improve adherence, prevent peeling, and reduce the number of coats needed to finish the job. While all primers contain more resins and less pigment than paint, formulas vary from product to product. We tested some of the most popular options to find out which primer works best for different situations.
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The right primer for your project depends on the environment you’ll be working in, the surface you’ll be painting, and your preferences for the time frame of the job and its final look. Read on to find out what makes a quality paint primer and why the below options rank as our top favorites among the best paint primers we tested.
- BEST OVERALL: Rust-Oleum Zinsser Bulls Eye 1-2-3 Water-Base Primer
- BEST BANG FOR THE BUCK: Kilz Original Interior Primer
- BEST ALL-PURPOSE: Kilz 2 All-Purpose Interior/Exterior Primer
- BEST FOR METAL: Rust-Oleum Clean Metal Primer
- BEST FOR GLOSSY SURFACES: Kilz Adhesion Interior/Exterior Primer
- BEST FOR ODOR BLOCKING: Kilz Restoration Interior Primer
- BEST FOR EXTERIOR: Kilz 3 Premium Interior/Exterior Primer
- BEST FOR INTERIOR WALLS: Sherwin-Williams SuperPaint Interior Acrylic Latex
How We Tested the Best Paint Primers
We tested each paint primer according to established rubrics, including how easy it was to apply, how well it adhered to various surfaces, and its stain- and odor-blocking abilities. We rated each primer based on these rubrics on a scale between 0 and 4 to determine a score. Lastly, we tested the primer’s durability and how attractive the final finish appeared on each surface.
We applied each primer to metal, masonry, drywall, and wood surfaces. The drywall surfaces included water stains, mildew, and lingering smoke odors. We applied two coats of primer to each surface and allowed it to dry for an hour, and then followed up with a flat white top coat to determine if there was any bleedthrough of stains and to judge the smoothness of the top coat.
Our Top Picks
With those key features and shopping tips in mind, we spent hours narrowing the paint primer market and testing the top-rated products. One or more of these recommendations for the best paint primer may suit your specific needs.
Jump to Our Top Picks
What to Consider When Choosing Paint Primer
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When choosing a primer for your project, there are several features to consider. The best paint primer options efficiently cover multiple surfaces, block stains, and ensure an even, smooth top coat. Here are more details about important features to consider when choosing a paint primer.
Project Environment
Paint primers come in three formulas: interior/exterior, exterior, and interior.
Interior/exterior primers are suited for indoor and outdoor use, while exterior primers are designed for outdoor use only. Both contain additives that stave off UV-related fading and moisture-related mold issues; they also add flexibility to withstand frequent outdoor temperature changes, preventing the paint from peeling or cracking.
Interior primers, formulated without exterior additives, are only suitable for indoor use. Interior/exterior primer is the best bet for doing a range of painting jobs, indoors and out. Plus, choosing a primer that works inside and outside saves on the costs of buying separate interior and exterior products.
Surface
Each type of primer may adhere better to different surfaces. The following details the best primer type for common household surfaces:
- Bare wood: Apply an oil-based or latex primer to wood that has never been stained or painted to help seal the porous surface. Keep in mind that oil-based primers tend to emit more VOCs (smelly pollutants) than do latex primers.
- Drywall: Apply a latex primer to drywall, as an oil-based primer can raise the grain and make the surface look uneven.
- Stain-prone surfaces: Use a stain-blocking primer on stained wood, bare wood with high tannin content that can bleed out (e.g., cedar or redwood), interior walls with water or smoke stains, or cabinets/trim with grease stains. It will cover stains and keep them from bleeding into and discoloring top coats.
- Choose latex stain-blocking primer if the stains are solvent-based (e.g., crayons or grease).
- Choose an oil-based stain-blocking primer if the stain is water-based (e.g., water-based wood stain, smoke, or tannin).
- Painted wood: An oil-based primer is usually best for painted wood that shows chalking (a chalky powder on the surface as the paint binder degrades) or chipping; it will dry into a denser, smoother foundation to minimize these imperfections.
- Metal: Choose a rust-resistant oil-based primer on metals such as aluminum to avoid the formation of rust, which the water in latex primer can promote. Glossy surfaces: Bonding primer, formulated to stick to glossy surfaces, is a must for the slick likes of glass, plastic, or glazed tile.
Dedicated Primer vs. Paint-and-Primer in One
Self-priming paints—also known as paint-and-primer combo products—let users prime and paint a surface in a single step. But these two-in-one products are only recommended if all of the following are true:
- You’re not painting bare or stained wood.
- Your painting surface has no stains or signs of peeling.
- You’re repainting a previously painted surface in the same color or going from a lighter to a darker paint color.
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Choose separate paint and primer to improve paint adhesion in the following situations:
- You’re painting bare or stained wood.
- You’re painting over a surface that has stains or is peeling.
- You’re switching from a darker to a lighter paint color.
- You want to use a paint with a different base than that of the primer. For example, use an oil-based primer with a latex paint to take advantage of the rot resistance of the oil primer and the lower VOCs and faster drying of the latex paint.
- You want to cover an old oil-based paint coat with a latex paint coat. An intervening layer of a dedicated primer is needed for optimal adhesion of the latex paint.
Tintability
Primer usually comes in white or gray. Use either color as is without tinting it or have the primer tinted to a hue that’s slightly lighter than the top coat. Tinting primer, which requires buying a primer labeled “tintable,” generally achieves a deeper, richer, and more uniform final color but is particularly recommended in the following situations:
- You’re changing the color from darker to lighter. The tinted primer reduces the number of paint coats needed to hide the darker base coat.
- For stubborn stains, like water or mildew, a tinted primer is necessary to block the stain effectively from bleeding through, especially when there is a light-color top coat.
- You’re changing from a lighter to a dramatically darker color, e.g., light blue to black. The tinted primer ensures that even if the top coat is uneven, no patches of white or gray primer will show through it.
Dry Time
Pay attention to the “dry-to-recoat” time specified on the primer packaging—an indication of when the primer is dry enough to be recoated either with another coat of primer or with paint. In general, latex primers have a shorter dry-to-recoat time of no more than 1 hour, whereas oil-based primers need 1 to 3 hours before they can be recoated.
FAQs
Although all paint primers are supposed to perform the same primary function, some differences exist. Here are answers to some frequently asked questions that may provide additional help when selecting and using paint primers.
Q. Should I use an oil-based or water-based paint primer?
Water-based primer is best for walls and ceilings. Oil-based primer is primarily used for doors, windows, metal, woodwork, or over tough stains in well-ventilated areas.
Q. Which is better: primer or paint with primer?
Paint with primer is best for previously painted walls. Primers are recommended for use on any surface that has not been previously painted.
Q. Do I have to use paint primer?
No, but using a paint primer does reduce the amount of top coat paint needed, and it protects and seals the surface.
Source: https://gardencourte.com
Categories: Outdoor