Flat roofs are common in commercial buildings because they’re cost-effective and provide easy access for maintenance, HVAC systems, and solar panels. However, their design also makes them vulnerable to standing water, UV exposure, and surface wear. Applying a high-quality roof coating can dramatically improve your roof’s performance, extend its lifespan, and reduce energy costs.
At Rhino Roofers, we use a variety of coating materials tailored to each roof type and business need. Below, we’ll explore the most effective flat roof coating materials—and how to choose the one that best fits your property.
1. Asphalt Roof Coatings
Best for: Metal roofs, built-up roofs, and membrane roofs
Asphalt-based coatings are one of the most traditional and trusted options in commercial roofing. These coatings use a solvent to thin the material, making it easier to apply without heavy equipment. The result is a durable, waterproof surface that can be brushed or sprayed onto the roof.
Because asphalt coatings bond well to metal and membrane surfaces, they’re a reliable choice for older roofs or those needing quick restoration. They perform well in varied weather conditions and offer excellent protection against water intrusion.
Pro Tip: Reapply asphalt coatings every 5–7 years for consistent waterproofing performance.
2. Acrylic Roof Coatings
Best for: Metal roofs and general-purpose commercial applications
Acrylic coatings—sometimes called elastomeric coatings—are a popular choice for businesses looking for an affordable, reflective solution. They prevent rust, resist cracking, and can expand or contract with temperature changes. This makes them ideal for metal roofs that experience thermal expansion.
Acrylic coatings are often sprayed using specialized nozzles, allowing for quick and even coverage. They are also highly reflective, helping reduce cooling costs during hot Texas summers.
At Rhino Roofers, we use acrylic coatings in many applications because they’re durable, versatile, and suitable for all climates.
Key Benefit: Economical, flexible, and UV-resistant—ideal for energy efficiency and longevity.
3. Rubberized Aluminum Roof Coatings
Best for: Built-up roofs, single-ply membranes, spray polyurethane foam, and modified bitumen systems
Rubberized aluminum coatings offer the perfect combination of impact resistance and heat reflection. The aluminum particles reflect sunlight, lowering interior temperatures, while the rubberized base provides elasticity and protection against minor roof movement or vibration.
This coating type is particularly effective in preventing damage from hail or falling debris. It resists cracking and helps maintain the roof’s surface integrity over time.
Bonus: Its reflective surface can contribute to LEED energy efficiency points for commercial buildings.
4. Polyurea Roof Coatings
Best for: Metal roofs, foam roofs, and single-ply membranes
Polyureas are among the most advanced and versatile roof coatings on the market. They come in several forms—some closely resemble urethane coatings, while others behave more like acrylic elastomers.
Regardless of the formulation, polyurea coatings provide:
- Abrasion and corrosion resistance
- Waterproofing
- Structural reinforcement
- Chemical and UV protection
These coatings cure quickly, minimizing business downtime. Their strong adhesion and resilience make them an excellent choice for commercial facilities with heavy exposure to weather or chemicals, such as manufacturing plants or warehouses.
Key Advantage: Fast-curing, durable, and highly protective—perfect for demanding commercial environments.
5. Urethane Roof Coatings
Best for: High-traffic areas and roofs prone to water pooling
Urethane (or polyurethane-based) coatings stand out for their flexibility, seamless application, and superior durability. They move with your roof structure, which makes them ideal for buildings subject to expansion or vibration.
Because they resist ponding water and handle heavy foot traffic, urethanes are often used on rooftops with maintenance access points, mechanical units, or walkways. They also provide excellent impact resistance compared to other coatings.
Pro Tip: For best results, pair a urethane topcoat with a compatible primer for improved adhesion and longer lifespan.
6. Polyurethane Roof Coatings
Best for: Roofs that experience heavy wear or frequent foot traffic
Polyurethane coatings come in two main types—aromatic and aliphatic—each with distinct advantages.
- Aromatic Polyurethane: Less expensive, great for base coats, but not UV-resistant.
- Aliphatic Polyurethane: UV-stable, holds color well, and resists dirt buildup. Ideal for a topcoat that keeps your roof clean and reflective.
Aromatic coatings are often applied as a foundation layer, followed by an aliphatic topcoat for maximum performance. Together, they create a system that’s water-resistant, durable, and highly reflective.
Key Benefit: Ideal for multi-layer systems that balance affordability and long-term protection.
7. Silicone Roof Coatings
Best for: Roofs exposed to ponding water or extreme weather conditions
Silicone coatings are among the most water-resistant and long-lasting materials available for flat roofs. They’re solvent-free, easy to apply, and capable of withstanding ponding water for extended periods. Silicone forms a thick, seamless membrane that prevents leaks and resists degradation from UV exposure.
With a lifespan of up to 10–15 years, silicone coatings are a favorite for property owners looking for minimal maintenance and high performance. However, because the surface can become slippery when wet, they’re not recommended for heavy foot traffic.
Bonus: Silicone’s high reflectivity helps keep buildings cooler and reduces energy costs.
8. Granules for Added Protection
Best for: Roofs requiring slip resistance or enhanced durability
Granules can be added to almost any coating system to increase impact and abrasion resistance. They also create a non-slip surface, making the roof safer for maintenance crews or frequent access areas.
These granules work well on asphalt, modified bitumen, and single-ply systems. They’re especially beneficial for commercial facilities like warehouses, restaurants, or hospitals where rooftop equipment requires regular servicing.
Pro Tip: Ask your roofer about embedding reflective granules to boost energy efficiency while improving surface safety.
Choosing the Right Flat Roof Coating
The best coating depends on your roof type, local climate, and building needs. A professional roofer can help you evaluate existing roof conditions, identify problem areas, and recommend a material that provides long-term protection and value.
At Rhino Roofers, our team specializes in custom commercial roof coating solutions that extend the life of your roof and improve its performance. Whether your goal is to stop leaks, reduce energy costs, or prepare your roof for the next decade, we have the expertise to match you with the right system.
Protect Your Investment With Rhino Roofers
No matter the size or complexity of your building, a professionally applied roof coating can make all the difference. From acrylics and silicones to advanced polyureas and urethanes, Rhino Roofers helps Texas businesses stay dry, efficient, and worry-free.
Schedule your free 37-point commercial roof inspection today and learn which coating material is the perfect match for your property.