Painting Brick The RIGHT Way With KEIM Mineral Paint

Keim Mineral Coatings Blog

The Enduring Beauty of Brick: Why Mineral Silicate Paints Reign Supreme!

In a video titled “Painting Brick the RIGHT Way with KEIM Mineral Paint” from the Green Building Network, the importance of using mineral silicate paints on brick, especially older masonry homes, is highlighted. Many homeowners make the mistake of using elastomeric or latex paints, which trap moisture and lead to serious problems like cracking, spalling, and overall degradation of the brick over time. The video emphasizes that mineral silicate paints, such as KEIM mineral paints, allow the brick to breathe, preventing moisture buildup and protecting it for decades.

Brick structures, especially those of historical significance, possess a timeless charm. However, maintaining their integrity requires a nuanced understanding of their material properties. One of the most critical aspects is managing moisture, and this is where the choice of paint becomes paramount. Traditional elastomeric or latex paints, while seemingly convenient, create a film that traps moisture, leading to a cascade of detrimental effects.

Understanding the Dangers of Non-Breathable Paints

When moisture becomes trapped within brick, it can lead to:

Spalling: This occurs when water absorbed by the brick freezes and expands, causing the surface to flake or peel.
Cracking: Trapped moisture can also contribute to the formation of cracks, weakening the structural integrity of the brick.
Efflorescence: This is the appearance of white, powdery deposits on the brick surface, caused by the migration of salts to the surface with evaporating water.
Mold and Mildew Growth: Damp conditions encourage the growth of mold and mildew, which can further degrade the brick and pose health risks.

The Breathability Advantage: Mineral Silicate Paints

Mineral silicate paints, like KEIM, offer a solution by allowing the brick to “breathe.” This breathability is achieved through a process called silicification, where the paint chemically bonds with the mineral substrate. This bond creates a highly durable and permeable surface that allows moisture vapor to escape.

Key Benefits of Mineral Silicate Paints:

Exceptional Breathability: This prevents moisture buildup, safeguarding the brick from damage.
Long-Lasting Durability: Mineral silicate paints are highly resistant to weathering, UV radiation, and fading.
Natural Aesthetics: These paints create a matte, mineral finish that enhances the natural beauty of brick.
Environmental Friendliness: Mineral silicate paints are typically free of volatile organic compounds (VOCs) and other harmful chemicals.
Resistance to Algae and Fungi: The high alkalinity of these paints inhibits the growth of algae and fungi.

A Detailed Guide to Applying KEIM Mineral Paint:

Proper application is crucial for maximizing the benefits of mineral silicate paints. Here’s a more in-depth look at the process:

Surface Preparation:
- Thoroughly clean the brick surface to remove dirt, dust, and any loose material.
- Address any existing damage, such as cracks or spalling, before painting.
- Ensure the surface is completely dry before applying the paint.
Old Paint Removal:
- Mechanical removal methods, like scraping or wire brushing, are often the safest options.
- If using chemical removal or pressurized water, exercise caution and follow the manufacturer’s instructions.
Crack Repair:
- For hairline cracks, use a compatible mineral-based filler.
- For larger cracks, consult a professional for appropriate repair methods.
Paint Application:
- Apply the paint in thin, even coats, following the manufacturer’s recommendations.
- Ensure proper coverage of all surfaces, including mortar joints.
- It is very important that the substrate is a mineral based substrate for the KEIM paint to have the proper chemical reaction.
Safety Precautions:
- Wear appropriate safety gear, such as gloves and eye protection.
- Work in a well-ventilated area.
- Follow all safety guidelines provided by the paint manufacturer.

The Importance of Professional Guidance:

While DIY application is possible, consulting professional experienced in mineral silicate paint application is highly recommended, especially for older or historically significant structures. They can assess the condition of the brick, recommend appropriate preparation and application techniques, and ensure optimal results.

By choosing mineral silicate paints and following proper application procedures, you can protect the beauty and longevity of your brick structures for generations to come.

Check out these links for more info on Mineral Masonry Paint:

Full Video – Green Building Network

Learn More – Best Paint For Brick

Mineral Masonry Paint – To Purchase

Painted Brick – Images