Residential Painting – the Exterior Painting Additives to Consider

A new coat of paint on the exterior can make a difference when it comes to keeping your home looking fresh and well-maintained. Not only does it boost your home’s curb appeal, but it also provides a layer of protection against the elements. But did you know that there are special additives you can mix into your paint that can offer even more benefits? These paint additives can help protect your home in various ways, from preventing mildew to improving insulation and even fireproofing.

If you’re a homeowner in Concord, you might be especially interested in these additives due to the local climate and potential environmental concerns. Whether you’re dealing with dampness, extreme temperatures, or fire risks, there’s an additive that can help. Let’s dive into the different types of exterior painting additives you should consider for your next residential painting project.

Types of Exterior Painting Additives

When you think about paint, you probably imagine the color and finish. However, the right additives can significantly enhance the performance and longevity of your paint job. Here are some common types of additives and what they do:

Mildew Resistance Additives

Mildew resistance additives are designed to prevent the growth of mildew and mold, which can be a common problem in damp or shaded areas of your home. These additives are particularly useful for areas like eaves, shaded walls, and spots where the exterior touches the ground. These additives reduce the need for frequent repainting and cleaning by inhibiting mildew growth.

Popular products include:

  • Zinsser ADD-2TM: Known for its effectiveness in preventing mildew, this additive is a reliable choice for homeowners dealing with damp conditions.
  • Jomaps M-1 Paint Additive: Another great option, this additive not only prevents mildew but also extends the lifespan of your paint job by reducing the frequency of repainting.

Insulation Additives

If you’re looking to improve your home’s energy efficiency, insulation additives are a great option. These additives help regulate your home’s temperature by reducing heat transfer through the walls. This can lead to lower heating and cooling costs. Insulation additives usually come in a powder form that you mix with your primer or paint.

Popular products include:

  • Hy-Tech Insulating Paint Additive: This additive provides excellent thermal insulation, helping to keep your home warm in the winter and cool in the summer.
  • Insuladd: Another well-regarded product, Insuladd is easy to mix with paint or primer and offers significant energy savings by improving your home’s insulation.

Fireproofing Additives

For those living in fire-prone areas, fireproofing additives can be a lifesaver. These additives help reduce the spread of flames, giving your home extra protection. Fireproofing additives are especially important in regions where wildfires are a concern.

Popular products include:

  • Hy-Tech Thermal Solutions Fireproofing Additives: These additives significantly lower flame spread ratings, making them an excellent choice for exterior paint. They are also available for interior use to help contain fires within the home.
  • Safety Think Fireproofing Additives: Another effective option is that these additives provide robust fire protection and are suitable for both interior and exterior applications.
  • Nelson Paint Company Fireproofing Additives: Known for their high-quality fireproofing capabilities, these additives help to safeguard your home against fire damage.

UV Protection Additives

Sunlight can cause paint to fade and deteriorate over time. UV protection additives help shield paint from harmful ultraviolet rays, keeping colors vibrant and paint jobs lasting longer. These additives are especially useful in sunny regions where UV exposure is high.

Popular products include:

  • UV Blocker Paint Additive: This product provides strong UV protection and is compatible with most exterior paints. It helps in maintaining the paint’s original color and finish.
  • Sikkens Cetol UV Protection Additive: This additive is ideal for homes in areas with intense sunlight because it is known for its superior protection against UV radiation.

Anti-Graffiti Additives

If graffiti is a concern in your area, anti-graffiti additives can make a huge difference. These additives create a protective barrier that makes cleaning graffiti off your walls easy without damaging the paint. This can save you time and money on repainting.

Popular products include:

  • Sherwin-Williams Anti-Graffiti Coating: This product provides a tough, durable finish that resists graffiti. It’s easy to apply and clean.
  • Fasnacht AG-50: This additive offers excellent protection against graffiti and can be used on a variety of surfaces, making it a versatile option.

Rust Inhibitors

Young asian happy woman painting interior wall

Rust inhibitors are essential for homes with metal surfaces. These additives prevent rust and corrosion, extending the life of metal fixtures and surfaces. They are especially useful for coastal homes where salt air can accelerate rusting.

Popular products include:

  • Rust-Oleum Rust Inhibitor: This additive provides a protective coating that prevents rust and corrosion. It’s ideal for metal surfaces exposed to harsh weather conditions.
  • POR-15 Rust Preventive Coating: Known for its high-performance rust protection, this product is excellent for both interior and exterior metal surfaces.

Bug Repellent Additives

Insect infestations can be a nuisance, especially in areas prone to bugs. Bug-repellent additives help deter insects from settling on your painted surfaces, providing an extra layer of protection for your home.

Popular products include:

  • Bug Juice Insecticide Paint Additive: This product is mixed with paint to repel a variety of insects. It’s effective for up to two years and is safe for use around children and pets.
  • Insect Shield Paint Additive: This additive provides long-lasting protection against bugs and can be used with both interior and exterior paints.

Choosing the Right Additive

Selecting the right additive depends on your specific needs and environmental conditions. It’s always a good idea to consult with a professional painter to determine the best options for your home. They can provide tailored advice and ensure the additives are used correctly for maximum benefit.

Application Tips

When using paint additives, following the manufacturer’s instructions carefully is important. Mix the additives thoroughly with your paint or primer to ensure even distribution. Apply the paint evenly and allow adequate drying time to achieve the best results. Always use proper safety precautions when handling and applying these products.


Incorporating the right paint additives into your exterior painting project can offer numerous benefits, from protecting against mildew and fire to improving insulation and preventing rust. These additives enhance the durability and functionality of your paint job, ultimately saving you time and money. 

For Concord homeowners, considering these additives can make your home better equipped to handle local environmental challenges. If you need further assistance, professional painters like Custom Painting, Inc. can provide expert guidance and services to ensure your project is a success. Call us at 925-294-8062 today or fill out our contact form to schedule an appointment.