Brick Paint Coatings: Why What You Put on Brick Matters More Than Whether You Do It

The debate over whether to paint brick misses the real question. The real question is what you put on it — because the right brick paint coating protects your masonry from Chicago's freeze-thaw cycles, while the wrong one traps moisture and causes the exact damage you were trying to prevent.

Can You Paint Brick? The Honest Answer

Yes, you can paint brick. The "never paint brick" advice you'll find online applies specifically to film-forming paints that trap moisture vapor inside the masonry — not to all brick coatings. Brick needs to breathe. Any product you apply needs to be vapor-permeable, meaning moisture can pass through the coating as vapor even though liquid water can't penetrate it.

Traditional latex and oil-based paints are not vapor-permeable. When you apply them to brick, you're creating a moisture trap. In Chicago's climate — where brick absorbs water in spring rain, that water freezes in the masonry pores in winter, and the expansion fractures the surface — a non-breathable coating accelerates spalling and mortar erosion. That's the legitimate concern behind "don't paint brick." It's not about aesthetics. It's about physics.

The answer isn't to never coat brick. It's to use a breathable coating. The Brick Industry Association has long documented how moisture management is the primary factor in brick exterior longevity.

Why Regular Brick Paint Causes Problems

Standard exterior latex paint on brick fails for two predictable reasons. First, it doesn't breathe. Masonry contains residual moisture that needs to escape as vapor — block that pathway and you get blistering, peeling, and eventually spalling where ice crystals form inside the brick face.

Second, standard paint is too thin and too rigid for masonry's surface movement. Mortar joints expand and contract differently than brick faces. A paint film that spans both without accounting for that differential movement will crack at the joints first, then lift at the edges, creating channels for water to get behind the film.

Once water is behind a non-breathable coating on brick, it has nowhere to go except into the masonry. That accelerates exactly the deterioration you were trying to stop.

What Is an Elastomeric Brick Coating?

An elastomeric coating is a thick-film, flexible coating designed specifically for masonry surfaces. The "elastomeric" designation means it stretches and recovers without cracking — it can bridge hairline cracks in mortar and accommodate the minor movement that happens in a masonry wall over time.

Good elastomeric coatings for brick are breathable (vapor-permeable), waterproof at the liquid level, UV-stable, and flexible enough to handle thermal cycling. Ceramic elastomeric coatings add another element: ceramic microspheres in the formulation that reflect UV radiation and reduce surface temperature, which cuts down on the thermal stress that breaks down ordinary coatings.

At 8–10 mils dry film thickness — compared to 3–4 mils for standard exterior paint — a properly applied elastomeric coating is substantial enough to actually seal the surface against liquid water intrusion while staying thin enough that moisture vapor can still pass through. See our lab-tested coating comparison for independent test data on how the Rhino Shield system performs on masonry.

Brick Paint Coatings vs. Traditional Paint: What's the Difference

Here's the practical distinction:

Traditional exterior paint on brick:

• Film-forming, non-breathable
• 3–4 mils dry thickness
• Traps moisture vapor inside masonry
• Causes spalling and mortar damage over time in wet climates
• Recoat every 5–7 years (if it lasts that long)

Elastomeric / ceramic brick coating:

• Vapor-permeable — breathes while waterproofing
• 8–10 mils dry thickness
• Designed for masonry thermal movement
• Bridges hairline cracks and mortar joints
• 25-year warranty when properly applied

The products are fundamentally different. They're not competing versions of the same thing.

Brick Coating in Chicago: Freeze-Thaw Cycle Considerations

Chicago gets significant freeze-thaw cycling every winter — temperatures above and below freezing can happen dozens of times between November and March. For unprotected brick, that cycling is the primary long-term damage mechanism. Water enters the masonry, freezes, expands about 9% in volume, and the pressure fractures the brick face or pops mortar joints.

A breathable waterproof coating stops water from entering at the surface while letting out any vapor already inside. That's what elastomeric coatings do that standard paint can't.

We coat brick throughout Cook, Lake, DuPage, and Kane counties. If you've got older brick in Elmhurst, Wheaton, Evanston, or anywhere else in the Chicago metro, a properly applied ceramic elastomeric system can stop the deterioration cycle and give you 25+ years without retreating the surface. See all the surfaces we coat — brick, stucco, fiber cement, and more.

Frequently Asked Questions

What kind of coating should I use on exterior brick?

Use a vapor-permeable elastomeric or ceramic-elastomeric coating — not standard exterior latex paint. The coating needs to be breathable so moisture vapor can escape from the masonry, but waterproof against liquid water penetration. Products applied at 8–10 mils dry film thickness, like Rhino Shield's ceramic system, are designed specifically for masonry and handle Chicago's freeze-thaw cycles without trapping moisture.

Why is painting brick with regular paint a bad idea?

Standard latex paint on brick forms a non-breathable film that traps moisture vapor inside the masonry. When that moisture freezes in winter, it expands inside the brick pores, causing spalling (surface flaking) and mortar joint erosion. This accelerates the very deterioration you were trying to prevent. The issue isn't painting brick — it's using a non-breathable product on a material that needs to breathe.

Can brick be coated without damaging it?

Yes — with the right product. Vapor-permeable elastomeric coatings protect brick from water intrusion while allowing moisture vapor to escape. Applied correctly on clean, sound masonry, they extend the surface life significantly. The coating must be breathable, flexible, and properly adhered; a non-breathable film-forming paint on brick causes damage.

How long does an elastomeric brick coating last in Chicago?

A properly applied ceramic elastomeric coating on brick in Chicago carries a 25-year transferable warranty with Rhino Shield. The coating is formulated to handle the thermal cycling and moisture conditions of the Midwest climate. Traditional exterior paint on the same surface typically needs reapplication every 5–7 years.

How do I know if my brick has been painted with the wrong product?

Look for peeling or bubbling paint, white salt deposits (efflorescence) showing through or under the paint film, or visible spalling where brick faces are flaking off. These are signs that moisture is trapped behind a non-breathable coating. If you see any of those, the existing paint needs to come off before applying a proper breathable coating.