What Are Elastomeric Paint and Coatings and How Are They Used?

Elastomeric paint is a flexible and durable coating designed to protect building surfaces while allowing the coating to expand and contract with changing conditions. It is commonly used on exterior walls, masonry, and roofs where added weather resistance and surface protection are needed.

But what makes elastomeric paint different from conventional coatings? Let's talk about it.

How Elastomeric Paint Works

Elastomeric coating is an above-grade exterior wall or roof coating approximately 10 times thicker than paint. It forms an incredibly thick yet flexible coating that helps waterproof the exterior of a structure. Unlike other coatings or paints, it can bridge hairline cracks to complete an airtight waterproof seal.

Furthermore, elastomeric paint is crafted from a blend of polymers, which are long chains of molecules that give the paint unique flexibility. These polymers include substances like acrylics or urethanes, which allow the paint to stretch and contract with changes in temperature and movement in the underlying surface without losing its integrity. The result is a thick, rubber-like coating that forms a durable and elastic layer over surfaces.

The coating’s thickness and flexibility also contribute to its waterproofing properties. When properly applied, elastomeric paint forms a continuous, moisture-resistant layer that helps prevent water from penetrating the coated surface.

Finally, these are also UV-resistant. It can withstand prolonged exposure to ultraviolet rays, helping protect the exterior surface from the damaging effects of intense sunlight.

Common Applications of Elastomeric Paint in Phoenix

Elastomeric coatings can be applied to surfaces like stucco, concrete, masonry, and others. When the coating is applied, it is in liquid form; it completely dries, hardens, and bonds to the structure and remains flexible, moving, bending, and flexing as the structure underneath moves.

Exterior Walls and Masonry

Elastomeric paint is commonly used in industrial settings on concrete and masonry surfaces, such as factory walls and equipment. Once cured, the coating creates a protective barrier that helps shield these surfaces from moisture, temperature changes, and exposure to harsh industrial environments.

For commercial properties, it can be applied to exterior walls to help protect the building envelope while maintaining the appearance of the property.

Elastomeric Roof Coatings

An elastomeric roof coating provides an additional protective layer over compatible commercial roofing surfaces. It is commonly used as part of a roof maintenance or weatherproofing strategy to limit water intrusion.

Because commercial roofs experience continuous exposure to sun, rain, and temperature fluctuations, the coating's ability to remain flexible can help accommodate minor movement in the roof surface.

Elastomeric Caulk

Elastomeric caulk is used to seal joints, seams, gaps, and other transitions where building materials meet. Unlike rigid sealants, it can accommodate movement around these areas while maintaining a seal.

Benefits of Elastomeric Paint for Phoenix Commercial Buildings

Elastomeric coatings are highly effective in commercial and industrial settings in Phoenix because it protects surfaces against many of the environmental stresses that can shorten the life of exterior surfaces. Think intense heat, UV exposure, and temperature fluctuations.

• Waterproof Protection: Elastomeric coatings form a continuous barrier over compatible surfaces that prevents water from penetrating the surface. This reduces the need for extensive water-damage cleanup in the event of heavy rainfall or leaks.
• Damage Protection: This coating helps protect the structure from damage. It also extends the building's lifespan by shielding it from various environmental stresses. The flexibility of the coating allows it to expand and contract with temperature changes, reducing the risk of cracking.
• Chemical and Mildew Resistance: Elastomeric paint is resistant to chemicals and mildew. The coating’s chemical resistance prevents degradation from harsh substances, while its mildew resistance inhibits mold growth.
• Color Retention: Elastomeric paint can be tinted to a number of colors and retains its color very well long-term. This allows for customization and helps maintain the building’s aesthetic appeal. The formulation of the coating prevents fading and discoloration from UV exposure. Get a FREE color render today.
• Aesthetic Maintenance: This paint helps maintain the building's exterior appearance. It prevents the less attractive appearance of damage, wear, and tear. The coating’s ability to bridge small cracks and imperfections ensures a smooth and uniform appearance.
• Heat Resistance: Elastomeric roof coatings are heat-resistant and help significantly improve the energy efficiency of the buildings to which they are applied. Because they are UV resistant, they basically act like a round-the-clock “sunblock” for your structure.
• Durability: The durability of elastomeric paint enables it to withstand harsh weather conditions and temperature fluctuations without deterioration. This resistance to environmental stress helps maintain the building’s integrity for extended periods.
• Long-Term Savings: The long-lasting nature of elastomeric coatings and other building components reduces the need for frequent reapplications, saving on maintenance costs. Its ability to protect surfaces from damage also helps minimize repair expenses over time.

Request an Elastomeric Painting Estimate from Ghaster Painting & Coatings

With 50+ years in business, Ghaster Painting & Coatings has the experience to handle commercial elastomeric coating projects in Phoenix with the attention they require. We are experts in commercial and industrial coatings and were voted #1 in Arizona for Commercial Painting for three consecutive years (2024-2026).

Frequently Asked Questions

How long will elastomeric paint last?

Elastomeric paint can last around 10 years or longer when properly applied and maintained. Its actual service life depends on the product, surface preparation, application quality, and the building’s exposure to sun, heat, moisture, and other environmental stresses.

When not to use elastomeric paint?

Elastomeric paint is not a substitute for repairing major structural damage or active leaks. While its flexibility allows it to accommodate minor surface movement and hairline cracks, significant structural movement, large cracks, or ongoing water intrusion should be properly addressed before coating.

What is elastomeric paint best for?

Elastomeric paint is best suited for exterior surfaces that need flexible, weather-resistant protection. It is commonly used on commercial walls, stucco, concrete, masonry, and compatible roofing surfaces.

Can I paint over elastomeric coating?

Yes, you can paint over an elastomeric coating if the existing coating is sound and properly prepared. The new paint must be compatible with the underlying elastomeric system, and the surface should be clean, intact, and free of peeling.

Can you use elastomeric paint inside?

Yes, but elastomeric paint is primarily designed for exterior applications. Some products are suitable for interior masonry, concrete, or other areas where moisture resistance and flexibility are needed, but the product’s specifications should always confirm interior use before application.