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Best Primer For Trim (2024 Update)

If you're looking for the best primer for trim, you've come to the right place. Choosing the right primer is crucial when it comes to painting and protecting your trim. With so many options available on the market, it can be overwhelming to find the one that suits your needs. That's why it's important to consider a few factors before making your purchase.

First, think about the type of trim you have. Is it made of wood, metal, or plastic? Different primers are designed for specific materials, so choosing a primer that is compatible with your trim will ensure optimal adhesion and long-lasting results. Additionally, consider the finish you desire. Do you want a matte or glossy finish? This will determine the type of primer you should choose.

Furthermore, it's essential to think about the environment in which the trim is located. Is it exposed to moisture or extreme temperatures? If so, you'll want to select a primer that has excellent weather resistance and can withstand these conditions. Additionally, consider any special requirements you may have, such as low VOC (volatile organic compound) primers for those who are sensitive to fumes.

Still unsure which primer to choose for your trim? Ask yourself these questions: Are you looking for a primer that provides excellent coverage in just one coat? Do you need a primer that dries quickly and allows for easy topcoat application? Are you searching for a primer that can prevent stains and tannin bleed-through? By answering these questions, you'll be able to narrow down your options and make an informed decision.

In conclusion, finding the best primer for trim requires careful consideration of factors such as the type of trim, desired finish, environmental conditions, and specific requirements. By taking the time to evaluate these factors and answering some crucial questions, you'll be on your way to selecting the perfect primer for your trim, ensuring a beautiful and long-lasting paint job.

10 Best Primer For Trim

# Product Image Product Name Product Notes Check Price
1
This product is ideal for priming and sealing surfaces with persistent and chronic moisture issues.
2
The Zinsser Bulls Eye 123 Plus White Water-Based Acrylic Primer is ideal for priming various surfaces before painting.
3
A water-based sealer primer that is ideal for coating surfaces before painting to prevent moisture damage and improve adhesion.
4
The Rust-Oleum Automotive Universal Bonding Primer Spray is ideal for prepping surfaces for paint adhesion.
5
This product is ideal for priming surfaces before painting to ensure better adhesion and high coverage of stains.
6
Ideal for priming a variety of surfaces before painting.
7
The product is ideal for providing a smooth, sandable base coat for priming surfaces before painting.
8
The product is ideal for quickly and efficiently priming surfaces before painting or applying a finishing coat.
9
This product is ideal for priming surfaces before painting, providing ultra coverage and a smooth finish.
10
The product is ideal for priming surfaces before painting, ensuring better adhesion and longer-lasting finish.
This product is ideal for priming and sealing surfaces with persistent and chronic moisture issues.
The Zinsser Bulls Eye 123 Plus White Water-Based Acrylic Primer is ideal for priming various surfaces before painting.
A water-based sealer primer that is ideal for coating surfaces before painting to prevent moisture damage and improve adhesion.
The Rust-Oleum Automotive Universal Bonding Primer Spray is ideal for prepping surfaces for paint adhesion.
This product is ideal for priming surfaces before painting to ensure better adhesion and high coverage of stains.
The product is ideal for providing a smooth, sandable base coat for priming surfaces before painting.
The product is ideal for quickly and efficiently priming surfaces before painting or applying a finishing coat.
This product is ideal for priming surfaces before painting, providing ultra coverage and a smooth finish.
The product is ideal for priming surfaces before painting, ensuring better adhesion and longer-lasting finish.

1. Zinsser 1 Qt 260925 White, Peel Stop Triple Thick Ponding Primer

This versatile coating is perfect for restoring peeling or worn surfaces both indoors and outdoors. The triple-thick formula penetrates deep into the surface, bonding with cracks and peeling edges to provide a solid foundation for a smooth finish. This product is suitable for use on a variety of surfaces, including wood, metal, concrete, and more.

Drying to the touch in just 30 minutes, this coating can be recoated in just 2 hours, making it an efficient option for any project. Depending on the porosity of the surface, one quart of this coating can cover anywhere from 12-50 square feet. The resulting finish is smooth, flexible, and sealed, providing a foundation for a topcoat of any alkyd or latex paint.

This water-based primer-sealer is ideal for sealing worn surfaces and providing an outstanding level of flexibility. Whether used indoors or out, this coating is designed to create a smooth, sealed finish that will last for years to come. Once applied, this coating can be topcoated with any latex or alkyd paint, providing a level of versatility that is unmatched in the industry.

2. Zinsser Bulls Eye 123 Plus White Water-Based Acrylic Primer 1 Gal.

Introducing the advanced technology primer, a must-have for all your projects. This exceptional primer is designed to deliver outstanding results, making it perfect for a wide range of applications. With its superior capabilities, it completely blocks all stains, water, tannin bleed, smoke, and more, ensuring a flawless finish every time.

One of the key features of this primer is its ability to penetrate and seal porous surfaces. Whether you're working with wood, drywall, or concrete, this primer will effortlessly bond to the surface, creating a durable barrier that prevents any unwanted substances from seeping through.

Say goodbye to the hassle of choosing the right primer, as this product takes the guesswork out of the equation. It is meticulously formulated to provide optimal coverage and protection, saving you time and effort. No matter the project, you can trust this primer to deliver exceptional results.

In addition to its impressive performance, this primer boasts a range of specifications that make it stand out from the competition. Its advanced technology ensures long-lasting durability, allowing your paint job to maintain its pristine appearance for years to come. The easy-to-use formula ensures a smooth and seamless application, even for beginners.

Rest assured that this primer is crafted with utmost quality and reliability in mind. It undergoes rigorous testing to ensure that it meets the highest standards of excellence. With this primer, you can have peace of mind knowing that you're using a product that is trusted and recommended by professionals.

Whether you're a seasoned DIY enthusiast or a professional contractor, this advanced technology primer is a game-changer. Its versatile nature makes it suitable for a wide range of projects, from home renovations to commercial applications. Experience the difference that this primer can make in your next project and achieve flawless results that will impress.

Choose the primer that combines advanced technology, exceptional performance, and ease of use. Elevate your projects to new heights with this primer that takes the guesswork out of primer selection. Don't settle for anything less than perfection – invest in this reliable and top-of-the-line primer today.

3. Aqua Lock Plus Sealer Primer (32 Oz)

The INSL-X Aqua Lock Plus is a versatile and high-quality primer sealer that is made of 100% acrylic material. It is designed to provide excellent adhesion to a variety of interior and exterior surfaces, making it ideal for a wide range of applications.

One of the key features of this primer sealer is its superior sealing and coverage qualities. It works well as a base coat for both latex and oil-based finish coatings, ensuring that your projects are finished to a high standard. Additionally, it has excellent stain blocking properties, which makes it perfect for use in areas that are prone to stains.

The INSL-X Aqua Lock Plus is also quick-drying, with a tack-free time of just 30 minutes. You can topcoat in as little as 1 hour, which means that you can complete your projects in a shorter amount of time. Furthermore, it has low VOC, which makes it an eco-friendly and safe option for those who are concerned about the environment.

This primer sealer provides 75 – 100 square foot coverage per quart, which means that you can cover a large area with a single quart. However, it is important to note that you should apply it when the surface and ambient temperature is above 50 °F (10 °C) and below 90 °F (32 °C) for best results.

Before painting, it is recommended that you review the INSL-X Aqua Lock Plus label for proper preparation and application tips. This will ensure that you get the best possible results and that your finished projects look their best.

4. Rust-Oleum 286793 Automotive Universal Bonding Primer Spray, 12 Oz, Flat White

Introducing the Automotive Primer, a top-of-the-line product that is designed to assist in bonding any top coat paint to even the most challenging automotive surfaces. This primer boasts a professional-grade formula that not only seals and protects surfaces but also creates the ideal surface for coating.

One of the standout features of this primer is its quick drying time. In just 30 minutes, the primer dries to the touch, allowing you to proceed with your painting project without any unnecessary delays. Additionally, each can of this primer covers an impressive 10-12 square feet, ensuring that you have ample coverage for your desired application area.

This Automotive Primer is specially formulated to create a lasting bond to various surfaces, including bumpers, trim, plastics, fiberglass, galvanized steel, and aluminum. No matter the material, this primer will provide superior adhesion, allowing the top coat paint to adhere seamlessly.

With its flat finish, this primer offers a smooth surface that is ready to be coated. This smoothness enhances the overall adhesion of the top coat paint, ensuring a professional and long-lasting finish. The flat finish also provides versatility, as it can be easily matched with a wide range of top coat paint colors and finishes.

Whether you are a professional auto body technician or a DIY enthusiast, this Automotive Primer is a must-have in your arsenal. Its professional-grade formula, quick drying time, and exceptional coverage make it suitable for any automotive painting project. From small touch-ups to larger scale renovations, this primer will consistently deliver outstanding results.

5. Zinsser 3608 Cover Stain Oil Base Primer Spray, 13 Oz, White

Zinsser Cover Stain Primer is the ultimate solution for hiding power both indoors and outdoors. This spray primer is designed to seal, block stains, and provide excellent adhesion for a smooth finish. With its high-hiding formula, it blocks most stains and helps seal water, smoke, and nicotine stains without requiring any sanding.

This primer is known for its ability to hide dark colors and prevent tannin bleed, making it ideal for new construction, remodeling, or repainting work. It sticks to interior and exterior surfaces with ease, and sands effortlessly, making it a versatile option for any project.

The Cover Stain Primer dries quickly on interior surfaces, providing enamel undercoating performance. It is also great for use on exterior surfaces, delivering full penetration and flexibility on surfaces. This primer is perfect for priming small projects.

Zinsser's Cover Stain Primer is a reliable and effective option for anyone looking to achieve a smooth and flawless finish. Its high-hiding formula ensures that most stains are blocked and sealed, while its ability to stick to various surfaces makes it incredibly versatile. Overall, this primer is a must-have for those looking to achieve a professional-grade finish on any project, big or small.

6. Insl-X Ap100009a-01 Prime All Multi-Surface Primer, 128 Fl Oz (Pack Of 1), White

This 100% acrylic primer is an excellent choice for sealing a variety of interior and exterior surfaces. With its powerful adhesion and stain blocking properties, it provides a strong seal and is easy to apply. Its quick drying formula allows for topcoating in as little as one hour, making it a great option for those who want to complete their project quickly. Additionally, this primer provides a mildew resistant coating to help keep surfaces looking great for longer.

One gallon of this primer provides coverage of 400 – 450 square feet, making it an economical choice for larger projects. However, it is not recommended for use on floor surfaces. To ensure the best results, it is important to apply this primer when the surface and ambient temperature is above 40 °F (4 °C) and below 90 °F (32 °C).

7. Vht Esp301007 Prime Coat White Sandable Primer Filler Can – 11 Oz.

Introducing the Premium Primer Filler, a top-of-the-line foundation for your enamel, acrylic, or synthetic lacquer projects. This exceptional product serves as an essential base, providing a tough and durable finish with outstanding adhesion to intermediate and top coatings.

One of the standout features of the VHT Prime Coat is its unique formulation, specifically designed to fill scratches or pinholes, resulting in a smooth and flawless surface. No need to worry about imperfections anymore, as this primer filler will effectively hide them, giving you a professional-looking finish.

Versatility is another key attribute of this multi-purpose primer filler. It can be used on various surfaces, including metal, fiberglass, masonry, wood, and most plastic surfaces. Whether you're working on a car, boat, furniture, or any other project, rest assured that this primer filler will provide exceptional results.

Easy to apply, the Premium Primer Filler dries quickly and evenly, allowing you to move forward with your project without unnecessary delays. Its reliable adhesion ensures that your intermediate and top coatings will bond securely, giving your finished product a long-lasting and resilient finish.

Please note that this specific item is not available for sale in Catalina Island. However, it is readily accessible to customers in other locations, providing them with an outstanding primer filler option for their various projects.

Choose the Premium Primer Filler for its superior quality and performance. With its ability to create a strong foundation, fill imperfections, and adhere seamlessly to a wide range of surfaces, this primer filler is a must-have for any DIY enthusiast or professional painter. Achieve the flawless finish you desire with this exceptional product.

8. Zinsser 356880 B-I-N Primer Turbo Spray System, 26 Oz, White

Introducing the B-I-N Turbo Spray, a high-performance primer that is designed for large paint jobs. With a 10" tall fan spread, this primer ensures professional spray equipment results, making it perfect for those who value efficiency and quality in their projects.

One of the standout features of this primer is its shellac-based formula, which effectively seals deep stains and odors. This makes it an excellent choice for disaster restoration jobs where thorough coverage is essential.

When it comes to drying time, the B-I-N Turbo Spray impresses yet again. It dries to the touch in just 15 minutes, allowing you to move on with your project swiftly. Additionally, each can covers an impressive 20-24 square feet, ensuring that you get excellent coverage with every application.

But the benefits don't stop there. This primer also acts as an ultimate stain blocker, making it a reliable wood sealer. It effectively blocks water stains, knots, sap, and more, providing a strong foundation for your paint job.

When it's time for the next step in your project, you'll be pleased to know that the B-I-N Turbo Spray can be painted after just 30 minutes. This quick turnaround time allows you to proceed with your painting process without unnecessary delays.

Furthermore, this primer sands easily to a powder when dry, making it a breeze to achieve a smooth and flawless finish.

9. Rust-Oleum 249058 Painter's Touch 2x Ultra Cover, 12 Fl Oz (Pack Of 1), Flat White Primer, 12 Ounce

This versatile spray paint is perfect for both indoor and outdoor use, making it an excellent choice for a wide range of surfaces. Whether you need to paint wood, plastic, plaster, metal, masonry, or unglazed ceramic, this spray paint has got you covered.

The oil-based formula of this spray paint is designed to resist chips and provide long-lasting protection. Not only that, but it has a low odor, making it a great option for those who are sensitive to strong smells.

This spray paint dries to the touch in just 20 minutes, and each can covers up to 12 square feet of surface area. The durable formula of this spray paint provides excellent hide and goes on smoothly, ensuring that your finished product looks professional and polished.

The flat primer in this spray paint provides a surface that is ready for painting, allowing you to achieve the color and finish that you desire. Additionally, the comfort spray tip and any angle spray make it easy to apply the paint evenly and accurately.

This spray paint is also fast-drying and wet or dry sandable, allowing you to quickly move on to the next step in your project. It should be noted that this item is not for sale in Catalina Island.

10. Rust-Oleum, 1 Gallon (Pack Of 1), White, 249937 Primer, 11 Fl Oz

Introducing the Gal Int/Ext Ltx Primer by Rust-Oleum! This top-quality product is designed to provide you with an easy and simple solution for priming both interior and exterior surfaces. With its impressive performance and trusted brand name, this primer is a must-have for any DIY enthusiast or professional painter.

Manufactured in the United States, this primer is crafted with precision and attention to detail. It is specifically formulated to offer excellent adhesion and ensure a smooth and durable finish. Whether you're painting walls, cabinets, furniture, or any other surface, this primer will help you achieve professional-looking results every time.

One of the key features of this primer is its user-friendly design. It comes in a convenient kit that includes everything you need to get started. Simply follow the easy instructions provided, and you'll be able to prime your surfaces effortlessly. Whether you're a seasoned painter or a beginner, this primer makes the process a breeze.

The Gal Int/Ext Ltx Primer boasts impressive parameters and specifications that set it apart from other products on the market. It is specially formulated to provide excellent coverage, allowing you to achieve a flawless finish with just one coat. This saves you time and effort, making your painting projects more efficient.

In addition to its excellent coverage, this primer also offers exceptional adhesion. It effectively bonds to various surfaces, including wood, metal, and concrete, ensuring that your paint job stays intact for longer. This means you can enjoy your beautifully painted surfaces without worrying about peeling or chipping.

Another important aspect to note is the durability of this primer. It creates a strong foundation for your paint, enhancing its longevity and protecting your surfaces from wear and tear. Whether it's high-traffic areas or outdoor elements, this primer stands up to the test, keeping your paint job looking fresh and vibrant.

As a trusted brand in the industry, Rust-Oleum is known for its commitment to quality and innovation. The Gal Int/Ext Ltx Primer is a testament to their dedication to providing customers with top-notch products. With its reliable performance and outstanding results, you can trust that this primer will deliver on its promises.

Best Primer For Trim FAQs

Are there any primers specifically designed for exterior trim that provide superior durability?

Yes, there are primers specifically designed for exterior trim that provide superior durability. One such primer is an oil-based primer. Oil-based primers are known for their excellent adhesion and durability, making them ideal for exterior trim. They provide a strong bond to the surface, ensuring that the paint adheres well and lasts longer.

Another option is a bonding primer. Bonding primers are designed to create a strong bond between the surface and the paint. They can be used on various surfaces, including exterior trim, and provide excellent durability.

Additionally, there are also primers with advanced formulae that include features like UV resistance and moisture resistance. These primers are specifically designed to withstand harsh weather conditions and provide long-lasting protection to the exterior trim.

It is important to consult with a professional paint supplier or a knowledgeable contractor to determine the best primer for your specific needs. They can provide recommendations based on the type of trim material, climate, and other factors to ensure superior durability.

Are there any primers that are specifically formulated for use on certain types of trim materials, such as vinyl or metal?

Yes, there are primers available that are specifically formulated for use on certain types of trim materials such as vinyl or metal. These primers are designed to provide excellent adhesion and durability on specific surfaces, ensuring a long-lasting finish.

For vinyl trim, it is recommended to use a primer specifically formulated for vinyl surfaces. Vinyl primers are designed to bond well with the smooth and non-porous surface of vinyl, providing a strong foundation for the paint to adhere to. They also help to prevent peeling or cracking of the paint over time.

Similarly, for metal trim, there are primers tailored for metal surfaces. Metal primers typically contain rust inhibitors and other additives that help to prevent corrosion and promote adhesion to metal substrates. They create a protective barrier between the metal and the paint, ensuring better adhesion and a smoother finish.

It is important to choose the right primer for the specific trim material to achieve the best results. Consulting with a paint professional or reading product labels can help in selecting the appropriate primer for your trim material.

Are there any primers that offer additional benefits, such as stain-blocking or odor-sealing properties?

Yes, there are primers available in the market that offer additional benefits such as stain-blocking and odor-sealing properties. These primers are specifically designed to address certain issues that may arise during the painting process.

Stain-blocking primers are useful when you are dealing with surfaces that have stains or discoloration. They create a barrier that prevents the stains from bleeding through the paint and ruining the final finish. These primers are commonly used on surfaces that have water stains, nicotine stains, or even tannin stains from wood.

On the other hand, odor-sealing primers are designed to tackle strong odors that can be difficult to eliminate. They contain special ingredients that help seal in odors such as smoke, pet smells, or cooking odors. By using an odor-sealing primer, you can ensure that the unpleasant smells are trapped and won't linger even after you apply the paint.

It is important to note that not all primers offer these additional benefits, so it's essential to read the labels and choose a primer that specifically mentions stain-blocking or odor-sealing properties.

What is the best primer for trim in high-humidity or moisture-prone areas, such as bathrooms or kitchens?

When it comes to choosing the best primer for trim in high-humidity or moisture-prone areas like bathrooms or kitchens, it is important to select a product that offers excellent moisture resistance and adhesion. One highly recommended option is an oil-based or shellac-based primer.

Oil-based primers, such as those with an alkyd base, are known for their superior moisture resistance and ability to create a strong, durable bond with the surface. They provide excellent adhesion and are less likely to peel or blister in high-humidity environments. Additionally, oil-based primers offer good stain-blocking properties, which can be beneficial in areas prone to water stains or discoloration.

Another reliable choice is a shellac-based primer. Shellac primers have excellent moisture resistance and can effectively seal porous surfaces. They are also known for their quick drying time, which is advantageous in areas where moisture is a concern.

Ultimately, the best primer for trim in high-humidity or moisture-prone areas will depend on the specific needs of your project. It is always a good idea to consult with a professional paint supplier or contractor who can provide personalized recommendations based on the conditions and requirements of your space.

What is the best primer for trim when painting over glossy or slick surfaces?

When painting over glossy or slick surfaces, it is crucial to choose the right primer to ensure proper adhesion and a smooth finish. One of the best primers for this purpose is an oil-based primer. Oil-based primers have excellent adhesion properties, which help them adhere well to glossy or slick surfaces. They create a strong bond between the surface and the paint, preventing peeling or chipping.

Additionally, oil-based primers are known for their stain-blocking capabilities, preventing any stains or discoloration from bleeding through the top coat. They also provide a smooth surface for the paint to adhere to, resulting in a more professional finish.

Some popular oil-based primers recommended for painting over glossy or slick surfaces include Zinsser Cover Stain, Kilz Original, and Sherwin-Williams ProBlock Oil-Based Primer. It is essential to follow the manufacturer's instructions for proper application and drying times.

If you prefer a water-based primer, look for one specifically designed for glossy surfaces. These primers often have bonding agents that help them adhere well to slick surfaces. Examples include Zinsser Bulls Eye 1-2-3 Water-Based Primer and Sherwin-Williams Extreme Bond Primer.

Remember, proper surface preparation, including cleaning and sanding, is crucial for achieving the best results when painting over glossy or slick surfaces.

What is the best primer for trim when painting with latex paint?

When painting trim with latex paint, it is essential to choose a primer that is specifically designed for this purpose. One of the best options is a high-quality latex-based primer. These primers are formulated to adhere well to trim surfaces and provide a smooth, even base for the latex paint.

One highly recommended primer for trim is the Zinsser Bulls Eye 1-2-3 Primer. This primer is known for its excellent adhesion, stain-blocking properties, and ability to bond to various surfaces, including trim. It creates a strong foundation for latex paint and helps it adhere better, resulting in a more durable and long-lasting finish.

Another excellent choice is the Sherwin-Williams ProClassic Interior Waterbased Acrylic-Alkyd primer. This primer combines the benefits of both acrylic and alkyd paints, offering excellent adhesion, stain-blocking, and a smooth finish. It is specifically formulated for trim and is compatible with latex paint.

Remember to follow the manufacturer's instructions for proper application and drying times to achieve the best results.

What is the best primer for trim when painting with oil-based paint?

When painting with oil-based paint, it is important to choose the right primer for trim to ensure a smooth and long-lasting finish. One of the best primers for trim when using oil-based paint is an oil-based primer itself. Oil-based primers have excellent adhesion properties and provide a solid base for the paint to adhere to. They also help to seal the surface, preventing any bleed-through from stains or wood tannins.

When selecting an oil-based primer for trim, it is recommended to choose one that is specifically designed for use on wood surfaces. Look for a high-quality primer that offers good coverage and dries quickly. Additionally, consider primers that have stain-blocking properties, as they can effectively prevent any discoloration or stains from coming through the paint.

Some popular brands that offer reliable oil-based primers for trim include Zinsser Cover Stain, Sherwin-Williams ProBlock Oil-Based Primer, and Benjamin Moore Fresh Start Oil-Based Primer. It is always a good idea to consult with a paint professional at your local paint store for specific product recommendations based on your project's requirements.

What is the best primer for trim when trying to achieve a specific finish, such as a smooth or textured surface?

When trying to achieve a specific finish on trim, the choice of primer can play a crucial role. For a smooth surface, it is recommended to use a high-quality oil-based or water-based primer that offers excellent adhesion and leveling properties. These primers help to create a smooth and even surface by filling in any imperfections and providing a solid base for paint.

If you are aiming for a textured surface on trim, you may consider using a primer specifically designed for textured finishes. These primers usually contain additives that create texture when applied, such as sand or fine particles. They help to build up the desired texture and enhance the overall appearance of the trim.

It is always advisable to consult with a professional at a local paint store or home improvement center for specific product recommendations based on your project requirements. They can provide valuable insights and suggest the best primer option for achieving the specific finish you desire.

Which primer is most effective at preventing bleed-through on stained or discolored trim?

When it comes to preventing bleed-through on stained or discolored trim, it is important to choose a primer that is specifically designed to tackle this issue. One highly effective primer in this regard is a stain-blocking primer. These primers are formulated with special ingredients that help to seal in stains and prevent them from bleeding through the newly painted surface.

One popular option is a shellac-based primer, such as Zinsser BIN. Shellac-based primers have excellent stain-blocking properties and can effectively seal in a wide range of stains, including water stains, smoke damage, and tannin bleed from wood. They also dry quickly and provide a good base for subsequent paint layers.

Another reliable choice is an oil-based primer, like Kilz Original. Oil-based primers also have strong stain-blocking capabilities and are particularly effective at sealing in oil-based stains, such as those caused by nicotine or grease. They provide a durable and reliable base for painting over stained or discolored trim.

Ultimately, the most effective primer for preventing bleed-through on stained or discolored trim may depend on the specific type of stain and the surface being primed. It's always a good idea to consult with a professional or a knowledgeable paint specialist for personalized advice and recommendations based on your specific situation.

Which primer is recommended for use on bare wood trim to ensure proper adhesion and a smooth finish?

When it comes to priming bare wood trim, it is essential to choose a primer that promotes adhesion and provides a smooth finish. One highly recommended primer for this purpose is an oil-based or shellac-based primer. These types of primers have excellent adhesion properties and help create a suitable surface for paint or other topcoats.

Oil-based primers are known for their ability to penetrate into the wood fibers, sealing the surface and preventing any tannins or stains from bleeding through. They also offer good adhesion and are compatible with both oil-based and latex paints.

Shellac-based primers, such as Zinsser BIN, are also a popular choice for bare wood trim. Shellac primers dry quickly, adhere well to wood surfaces, and provide excellent stain-blocking properties. They can effectively seal knots, sap, and other wood imperfections.

Ultimately, the choice between oil-based and shellac-based primer depends on your specific project requirements. It is important to consider factors like the type of paint you'll be using and any specific needs or concerns regarding the wood trim before making a final decision.