Commercial roof coatings offer an effective way to extend the life of a roof, improve energy efficiency, and protect against weather-related wear. These coatings form a seamless, protective layer over the existing roof surface, sealing minor leaks, preventing UV damage, and reducing thermal expansion. The right commercial roofing choice depends on your building’s roof type, climate, and performance goals.
Acrylic Roof Coatings
Overview
Acrylic roof coatings are water-based solutions that have been used for decades on commercial roofs. They are popular for their balance of cost, performance, and ease of application.
Benefits
UV resistance – Excellent at reflecting sunlight, which reduces roof temperature and cooling costs.
Affordability – Typically less expensive than other coating types.
Ease of application – Can be applied with a spray, roller, or brush.
Best Uses
Acrylic coatings perform well in areas with high UV exposure and minimal standing water. They’re commonly used on metal roofs, single-ply membranes, and built-up roofing systems.
Considerations
While durable, acrylic coatings can lose performance if subjected to constant ponding water. They may also require reapplication every 5–10 years for optimal results.
Silicone Roof Coatings
Overview
Silicone coatings are highly water-resistant and retain their flexibility even in extreme temperatures. They form a durable membrane that adheres to many roof types.
Benefits
Superior moisture protection – Ideal for roofs with ponding water.
UV stability – Maintains reflectivity and elasticity over time.
Longevity – Often lasts longer between recoating cycles compared to acrylics.
Best Uses
Silicone is a strong choice for flat or low-slope roofs, particularly in areas with heavy rainfall or where ponding water is common. It works well on single-ply membranes, spray foam, and metal roofing.
Considerations
Silicone coatings can attract dirt, which may reduce reflectivity over time. They are also more expensive than acrylics and can be slippery when wet.
Polyurethane Roof Coatings
Overview
Polyurethane coatings are known for their exceptional durability and impact resistance. They are available in two main types: aromatic (less UV resistant, often used as a base coat) and aliphatic (UV resistant, used as a topcoat).
Benefits
Impact resistance – Excellent for roofs subject to foot traffic or mechanical equipment.
Flexibility – Handles thermal expansion and contraction well.
Chemical resistance – Suitable for environments exposed to industrial pollutants.
Best Uses
Polyurethane coatings work well on modified bitumen, single-ply membranes, and metal roofs. They’re often chosen for industrial facilities or buildings where the roof is regularly accessed.
Considerations
They tend to be more costly than acrylic coatings and may require professional installation to achieve proper performance.
Asphalt-Based Roof Coatings
Overview
Asphalt-based coatings are solvent-based products often reinforced with aluminum pigments for added reflectivity. They’ve been used for decades to protect and extend the life of built-up and modified bitumen roofs.
Benefits
Waterproofing – Strong resistance to water penetration.
Cost-effective – Lower upfront cost compared to silicone or polyurethane.
Compatibility – Ideal for asphalt-based roofing systems.
Best Uses
Best suited for older built-up roofs, modified bitumen, and certain low-slope applications.
Considerations
These coatings can emit strong odors during application, may be less reflective than other options, and are not always ideal for high-UV climates without reflective additives.
Elastomeric Roof Coatings
Overview
Elastomeric coatings refer to a broad category of flexible coatings—often acrylic, silicone, or polyurethane-based—that can stretch and return to their original shape without cracking.
Benefits
Flexibility – Accommodates temperature-driven roof movement.
Seamless protection – Reduces the risk of leaks at joints and seams.
Versatility – Can be used on a variety of roof substrates.
Best Uses
Elastomeric coatings are a go-to choice for climates with large temperature swings, as they handle expansion and contraction without losing adhesion.
Considerations
The exact performance depends on the base material, so it’s important to select the right elastomeric formula for your specific roof type.
Choosing the Right Roof Coating
When deciding which commercial roof coating to use, consider:
Roof type and material – Not all coatings adhere equally to every substrate.
Climate conditions – UV exposure, rainfall, and temperature swings all influence performance.
Budget – Upfront cost versus long-term maintenance needs should be weighed.
Foot traffic – Some coatings handle mechanical impact better than others.
Warranty requirements – Manufacturers often have strict installation guidelines to maintain coverage.
A professional roofing contractor can evaluate your roof’s condition and recommend the most appropriate coating type for your needs.
Commercial roof coatings provide an effective, cost-conscious way to protect and extend the life of a roofing system. From affordable acrylics to durable silicones and industrial-grade polyurethanes, there’s a coating option to fit nearly every budget and application.
