Which Type Of Primer Is Best For The Outside?

Priming is a crucial step in painting projects, especially for outdoor surfaces. Oil-based primers are recommended for water-based stain-blocking, such as water-based wood stain, smoke, or tannin. Latex primers are suitable for previously painted surfaces, while shellac-based primers are ideal for stubborn stains. Exterior primers are recommended for all unpainted surfaces and those that have been poorly prepared, scraped, sanded, or repaired.

Sherwin-Williams offers various paint primers to cater to different surfaces. They are formulated to solve typical painting problems and make the finish coat smooth and uniform. Acrylic primer, or latex primer, has become the standard and is used more frequently than oil-based alternatives. The absolute best exterior primer for new wood is oil-based, but it should be mixed with mineral spirits and boiled linseed oil. Oil-based primers like Coverstain are best for raw wood on exteriors, as they block tannin bleed and increase adhesion.

The Sherwin Williams® slow-dry oil-based primer is the longest-lasting exterior primer as of 2020. Zinsser 123, Dulux Gripper, or SW Multipurpose are popular choices for exterior primers. A good primer, whether acrylic, acrylic/latex, or alkyd-based, allows paint to adhere more tightly to the surface and improves the topcoat’s appearance.

When choosing a primer, the primary consideration will usually be whether to use an acrylic primer or an alkyd, oil-based primer. Acrylic paint is a popular choice due to its ability to adhere to various materials, making it a versatile and effective choice for any project.

Do I need to prime the exterior before painting?

To create a cohesive paint job, it is essential to prime the entire house, especially if using latex paint over an oil-based surface. Surface prep is vital for health and safety reasons, as well as ensuring the new paint job looks good and lasts. To remove contaminants, it is essential to consult a certified contractor who can handle lead abatement before starting the process. Test the paint before proceeding with any further exterior painting prep.

Mold or mildew is a common contaminant, especially in humid areas. Look for black, green, or brown stains with a fuzzy appearance. If unsure if a stain is mold or mildew, apply common bleach. If it bleaches away, you have killed some mold or mildew. Use bleach or another EPA-registered microbiocide or fungicide to remove mold and mildew. Look for cleaners and degreasers that can remove grime, grease, and oil.

Is oil-based primer better for exterior wood?

Oil-based primer is a versatile and effective solution for painting interior and exterior wood surfaces. It seals the wood’s porous surface, prevents tannins from bleeding through the paint, and ensures proper adhesion. It also effectively blocks stains like water, nicotine, and ink, making it suitable for surfaces with existing stains or covering up old paint jobs. Oil-based primers can be applied to galvanized metals, wood, and previously painted surfaces, providing excellent adhesion and long-lasting durability, making them a versatile choice for various projects.

Do you need 2 coats of exterior primer?

Misconception 6: Multiple coats of primer are necessary if you can still see the previous color. However, it is not necessary to over apply the primer. As long as the primer applies uniformly over the previous color, one or two coats should be sufficient. A perfect white finish is achieved by applying the topcoat on top of the primer.

Misconception 7: Priming outside is not necessary. Exterior surfaces are exposed to elements such as heat, cold, wind, rain, snow, dust, dirt, pollution, and UV, which can cause paint failure due to lack of adhesion. Using an exterior primer first on a properly prepared surface can significantly impact the paint’s longevity or potential cracks, peels, or blisters.

For more information on which primer is right for your project, refer to kilz. com or product back labels.

What happens if you don’t prime exterior paint?

Before painting, it is essential to coat new, bare surfaces with primer to ensure even paint coverage and proper adhesion. This is because most bare surfaces have pores and imperfections that can cause uneven paint coverage. After removing old paint, it is crucial to apply a primer to prevent the paint from falling away. Additionally, primer can be used for aesthetic reasons, such as covering up previous colors and emphasizing new ones.

Tinted primer, which is the same color as the paint, can help cover up the previous tone and emphasize the new one, as the old paint won’t bleed through the primer and the new paint won’t soak through. In summary, priming new surfaces, removing old paint, and using tinted primer are essential steps in preparing for a successful paint job.

Is kilz primer good for exterior?

This product is designed for excellent adhesion to both interior and exterior surfaces, including masonry, metal, and bare wood. Surface preparation is essential, with surfaces must be clean, free of dust, chalk, oil, mold, mildew, loose paint, rust, and other foreign substances. If necessary, use a non-soapy detergent or a TSP substitute, rinse well, and allow to dry. For glossy surfaces, scuff sand the surface thoroughly before priming. For peeling or checked paint, scrape off loose paint and sand to a smooth surface.

For mold or mildew covered surfaces, wash the area with mildew remover, rinse with water, and allow to dry before priming. For masonry surfaces that have cured at least 90 days, use KILZ PREMIUM or KILZ 2® Primers. Fire restoration is crucial, and eye protection is recommended. The product can be applied using a brush, roller, or sprayer, and should be used when the painting surface and air temperatures are between 35°F and 90°F. The product can be tinted with up to 2 ounces of universal colorant per gallon, and the coverage can range from 300-400 sq. ft. per gallon depending on the application method and surface porosity.

Is kilz a good exterior primer?

KILZ ORIGINAL Interior/EXTERIOR Primer is a highly effective product for blocking graffiti, tannin, water, smoke, and other bleeding stains. It has excellent adhesion and penetration to bare wood, dries quickly, and provides a mildew-resistant coating. It is best for use on almost all exterior surfaces, including stucco, wood, masonry, and brick. It is not recommended for use on flooring. All surfaces must be clean, free of dust, chalk, oil, grease, wax, polish, mold, mildew, loose peeling paint, rust, and other foreign substances.

If washing is necessary, use a non-soapy detergent or a TSP substitute, rinse well, and allow to dry. For glossy surfaces, scuff sand thoroughly before priming. For masonry, brick, stucco, and plaster, use KILZ® PREMIUM or KILZ 2® Primers if masonry has cured less than 90 days. For fire restoration, clean damaged surfaces thoroughly before priming. Primer recommendations include water-based primers like KILZ® RESTORATION or oil-based primers like KILZ® ORIGINAL (interior use) or KILZ® ORIGINAL EXTERIOR.

Should I do one or two coats of primer for exterior?

In order to achieve a successful paint job on a dark or brightly colored wall, it is essential to apply two or three coats of primer. This will ensure a strong bond and provide adequate coverage of any previous colors, particularly red, orange, or outdated hues. In the majority of cases, two coats of primer are required for most painting projects. It is recommended that the primer be applied liberally and that it be allowed to dry fully before the application of the final interior paint coat. For further information on painting techniques, please refer to the link provided.

Should I sand after primer?

Sanding primer before painting is essential to create a neutral surface and cover up existing wall colors. It is particularly important for black or bright walls, as it allows for the display of new colors. Priming is also necessary for new walls or those with patched holes. It is crucial to create an even, solid base for the paint color and for a smooth look by sanding the primer under the paint layers. Therefore, it is essential to apply primer before applying paint to ensure a smooth and even finish.

What primer should I use for exterior?

Acrylic primer, also known as latex primer, is a water-based coating used to prime wood siding, trim, galvanized metal, and T-111 and Hardie board siding. Proper prep work is crucial for any project, especially exterior house painting. A good primer allows paint to adhere more strongly to the surface, smooths into cracks and pores in the substrate, and improves the paint’s ability to resist surface moisture. To find the best primer for your home, it is essential to find one that will adhere to the specific surface you’ll be painting. By following these tips, you can ensure the success of your paint job.

How long after primer can you paint?

Popular primer brands like Kilz, Zinsser, Behr, and Loxon are designed for quick-drying times, with a good rule of thumb being to wait at least 60 minutes before applying a topcoat. Allowing an hour for primer to dry is a good baseline, but there are variables that affect the drying time. For more information on painting primer, including factors causing slower drying, selecting the right primer for your job, and different types of primers, refer to the rest of this blog post. The goal is to provide a comprehensive understanding of how primers work and how to choose the right one for your project.

What is the best primer for exterior signs?

To create solid colored wooden signs from bare wood or plywood surfaces, use wood primer. Oil-based paints are the most commonly used for exterior sign making, with Johnstone’s wood primer being the preferred choice. Thin the primer with white spirits or turpentine, especially for large flat areas. Johnstone’s wood primer is cost-effective, reliable, and solidifies well after two coats. In most plywood painting situations, use two coats of thinned wood primer before one coat of undercoat and at least two coats of gloss per side. This method ensures longevity in harsh exterior conditions.