10 Best Metal Roof Sealants 2026 in the United States

The EternaBond RoofSeal White sealant tape stands out for its versatility and ease of use. It bonds effectively to a wide range of surfaces including aluminum, galvanized steel, wood, fiberglass, and various roof materials like EPDM and TPO, making it suitable for multiple uses such as on metal buildings, RV roofs, and boats.

The tape's advanced MicroSealant creates a durable, waterproof, and airtight seal without the need for additional sealing, which simplifies the application process and reduces the need for extra materials. Its flexibility at extremely low temperatures, down to -57°C (-70°F), ensures it remains effective in harsh conditions. Additionally, its excellent UV resistance prevents deterioration from sun exposure, enhancing its longevity and durability.

However, it's important to note that while the one-step process is convenient, the tape's thickness of 35 mils may make it slightly difficult to conform to irregular surfaces. Also, while it is highly effective for sealing, it may not be the best option for users needing a product with a quicker curing time as tapes generally require a bit of pressure and time to adhere properly. This product is ideal for those looking for a long-lasting, multi-use sealant tape that is easy to apply and requires minimal additional tools or materials.

The Henry Pro Grade 988 Silicone White Roof Coating appears to be a robust option for sealing metal roofs. One of its standout features is its rapid curing time, being rain safe in just 15 minutes, which is beneficial for areas with unpredictable weather. Additionally, its high solids content allows for a single coat application, making the process less time-consuming and labor-intensive.

The permanent ponding water resistance is a significant strength, ensuring long-term durability even in areas prone to water accumulation. The product's superior UV resistance and reflectivity help protect the roof and potentially reduce cooling costs. The Henry Pro Grade 988 is also NSF P151 approved for rainwater catchment, adding an environmental and practical benefit for water reuse systems.

It is low odor and VOC compliant, making it safer to use in various jurisdictions with stringent regulations. The application method is straightforward with a 4.75-gallon pail, and the white and black color options offer some versatility in aesthetics. However, the product is relatively heavy at 56 pounds, which could make handling more challenging during application.

Rust-Oleum’s Elastomeric Roof Coating is designed specifically for metal and other roofing surfaces, offering strong waterproof and weatherproof protection. It stands out with excellent UV resistance, boasting an initial reflectivity of 84% that remains fairly high at 74% after weathering, helping keep roofs cooler by reflecting sunlight. The coating cures relatively fast, becoming rain-resistant in just 6 hours, making it convenient for quick projects.

It comes in a large 4.75-gallon pail and applies as a sprayable liquid, which can simplify the application process compared to brushes or rollers. Customers have praised its durability and consistent performance, resulting in a high rating from users. While it provides good adhesion and flexibility suitable for metal roofs, the coverage area is around 35 square feet per pail, which may require multiple units for larger roofs.

Additionally, the matte white finish may not suit everyone’s aesthetic preferences. This product is a solid choice if you want a reliable, weather-resistant sealant with fast curing time and strong UV protection, especially when working on smaller areas or RV roofs where reflectivity and waterproofing are particularly important.