10 Best Metal Roof Sealants 2025 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.

The BEEST RV Roof Coating White is a versatile sealant designed for a variety of surfaces, including metal roofs. One of its standout features is its flexibility, thanks to its elastomeric and liquid rubber composition, making it highly effective in adapting to roof movements and preventing leaks. It also scores high on UV resistance, with its solar reflective properties that protect your roof from sun damage. This makes it an excellent choice for areas with high sun exposure.

When it comes to durability, the product is engineered to withstand extreme temperatures, providing year-round protection, which ensures long-lasting results. However, it requires a bit of patience as the curing time is around 48 hours, which might be longer compared to some other products. Additionally, its eco-friendly and solvent-free formula makes it safer to use around humans and pets.

The application process is straightforward, suitable for DIY enthusiasts, as it can be applied with a brush, roller, or sprayer. On the downside, achieving the desired coverage might require multiple coats (2-3 heavy applications), so it’s essential to calculate the required quantity accurately to avoid running out of product mid-task. Also, for EPDM roofs, a primer is necessary, adding another step to the process. Weighing 10 pounds, the product is quite manageable, and its 1-gallon volume is ideal for smaller projects or touch-ups. In summary, the BEEST RV Roof Coating White is an excellent metal roof sealant with strong adhesion, flexibility, and UV resistance, although users should be prepared for a multi-step application process and longer curing time.