Best Waterproof Coating for Metal Roofs
| # | Name | Preview | Rating | Action |
| 1 | Rubberseal Liquid Rubber Waterproofing and Protective Coating |  | 9.8 | |
| 2 | Gorilla Waterproof Patch & Seal Liquid |  | 9.7 | |
| 3 | AMES RESEARCH LABORATORIES MSS1 Maximum Stretch Roof Coating |  | 9.2 | |
| 4 | Leak Stopper Rubber Flexx Liquid Rubber Coating |  | 9.1 | |
| 5 | L R Liquid Rubber Waterproof Sealant |  | 7.8 |
Testing Method
We applied each coating to a piece of metal roofing and left the panels in place for two months, exposing them to the elements from above and from the side and under the overhangs. We used a pressure-washer and a hose to wet the coatings, tended to them as they dried, and measured their durability with a T-cut durometer. We applied the coatings according to their instructions, using a roller or brush and working in temperatures between 40 and 85 degrees Fahrenheit.
When coating metal roofs, you have to be very careful to avoid damaging gutters and downspouts. Because of this, we applied the coatings from the top of the roof only, and we always made sure we had plenty of spares—enough to replace any downspouts that got damaged. For a coating that requires multiple coats, we applied one coat per day over the course of several days.
During our testing, we also considered how easy each coating was to clean up, which is important because small overspray can get on plants and shrubs. We wiped the coatings off of shrubs with paper towels, cardboard, and a plastic roller cover.
We followed up all our field testing with lab testing by having independent lab tests performed on the products we were considering. These tests measured the hardness of the coatings using several different methods that are specified in ASTM D3361.
Afterward, I took our top five contenders back to my house, where I installed them on my personal metal roof and allowed them to cure for two months. The paint gave me plenty of time to evaluate its appearance—both on the roof and in my yard—and any lingering odors it might have left in the air.
Rubberseal Liquid Rubber Waterproofing and Protective Coating
Our Verdict
This Rubberseal Liquid Rubber Waterproofing and Protective Coating is an easy-to-use and reliable solution for waterproofing and protecting roofs and RV roofs. It is EPA Energy Star rated, has low VOC, and excellent elongation to help ensure a long-lasting protective coating. The roll-on white 1 gallon formula offers ceramic insulating properties and is resistant to aging and UV exposure.
With a spread rate of 60 sq ft/gal at 20 imperial mils, you can be confident that you will get the coverage you need.
Gorilla Waterproof Patch & Seal Liquid
Our Verdict
Gorilla Waterproof Patch & Seal Spray is a must-have for all homeowners. This flexible, rubberized coating seals out water, air, and moisture to help stop and prevent leaks. It’s easy to apply – just brush, roll, trowel, dip, or pour – so you can quickly get the job done.
The self-leveling formula smoothly covers small gaps and cracks to provide a waterproof seal that you can rely on. With 16 ounces of waterproof spray in the convenient pack of 1, you can rest assured that your home is protected from water damage.
AMES RESEARCH LABORATORIES MSS1 Maximum Stretch Roof Coating
Our Verdict
AMES RESEARCH LABORATORIES MSS1 Maximum Stretch Roof Coating is the perfect solution for all your roofing needs. This white, elastomeric, acrylic, rubberized roof coating & sealant is designed to provide maximum protection with 650% elongation to resist cracking & peeling. With 88% light reflectivity, this bright white finish will reduce surface temperatures, resulting in lowered cooling costs.
Plus, it adheres to metal surfaces with ease, making it easy to apply and maintain. With Ames Maximum-Stretch, your roof will stay protected and looking great for years to come.
Leak Stopper Rubber Flexx Liquid Rubber Coating
Our Verdict
Leak Stopper Rubber Flexx Liquid Rubber Coating is the perfect solution for sealing and waterproofing roofs, walls, gutters, foundations, and more. It creates an effective water, moisture, and air barrier on whatever surface it is applied to. This versatile product is easy to use, with the ability to brush, roll, dip, or pour it on the desired surface.
The 1 Quart White container provides enough coverage to tackle your toughest sealing and waterproofing needs. With Leak Stopper Rubber Flexx Liquid Rubber Coating, you can rest assured that your surfaces will remain safe and secure.
L R Liquid Rubber Waterproof Sealant
Our Verdict
This L R Liquid Rubber Waterproof Sealant is a multi-surface leak repair indoor and outdoor coating that is water-based and easy to apply. It is a highly flexible and durable membrane with an original black finish that has over 1000% elongation preventing adhesion failure, and is UV stable to stop the sun from degrading the product. This waterproof sealant is perfect for protecting flat roofs, metal roofs, sloped roofs, planter boxes, foundations, sheds, basements, and more.
It is suitable for use on metal, wood, concrete, and other surfaces. With its superior protection, it is ideal for any home improvement project.
Consider These Factors to Ensure Your Pick Checks All the Boxes
Durability
When looking for a waterproof coating for a metal roof, it is important to consider the durability of the product. Look for a coating that is designed to withstand extreme temperatures, humidity, and other weather conditions, as well as the wear and tear of foot traffic or other sources of physical damage. The product should also be able to tolerate abrasions, UV exposure, and impacts.
Resistance to Chemicals
It is also important to find a waterproof coating that is resistant to chemicals, such as motor oil and gasoline. Make sure to check the product label to ensure that it can handle any chemical exposure it may be exposed to. Additionally, if the metal roof is located in an area with a high salt content, it is important to select a product that is designed to resist salt damage.
VOC Emissions
Volatile Organic Compounds (VOCs) are chemicals that are emitted from certain paints, adhesives, and other products. It is important to choose a waterproof coating that has low or no VOC emissions, as these chemicals can be harmful to both humans and the environment.
Flexibility
The waterproof coating should be able to accommodate the expansion and contraction of the metal roof due to changing temperatures. Look for a product that is designed to remain flexible and adhere to the roof, even in extreme weather conditions.
Ease of Application
When choosing a waterproof coating, it is important to consider the ease of application. Look for a product that is easy to apply and does not require a lot of specialized tools or expertise. Additionally, make sure the product is compatible with the existing roof material to ensure a successful application.
What Is the Best Waterproofing for Metal Roof?
Silicone sealants provide the best waterproofing for metal roof systems. They are easy to install, and provide a secure seal between metal and other materials. Silicone sealants are also highly resistant to moisture, UV rays, and temperature changes, making them a great choice for metal roofing.
They also allow for greater joint movement than other waterproofing materials, so metal roofs can better withstand the elements. When properly applied, silicone sealants can provide years of reliable protection for metal roofs that will keep them looking great and performing well. With the right silicone sealant, metal roof owners can rest assured that their roof is well protected from the elements.
What Is the Best Way to Seal a Leaking Metal Roof?
Sealing a leaky metal roof can be a daunting task, but there is a solution that doesn’t require replacing the entire roof. Using a high-solids polyether or silicone sealant is the best way to go about sealing a metal roof because it provides a solid protection. Furthermore, many types of sealants are pigmented to match the color of the roof, so the repair blends in and looks professional.
The process of sealing the roof is fairly simple and can be done by the homeowner. First, clean the area around the leak with a wire brush and then use a putty knife to remove any dirt and debris from the surface of the roof. Apply the sealant over the area and spread it evenly with a brush.
After the sealant is dry, the roof should no longer be leaking. With proper preparation and the right materials, sealing a leaking metal roof can be a cost-effective way to extend the life of the roof.
What Is the Best Coating for a Metal Roof?
Polyurethane coatings are widely recognized as providing the best protection and weatherproofing for metal roofs. With its superior impact resistance and ability to withstand foot traffic, polyurethane coatings are the preferred choice for metal roofs. The two types of polyurethane coatings, aromatic and aliphatic, are typically used in combination, with a base coat and topcoat.
This combination provides a more durable and long-lasting roofing solution. Furthermore, polyurethane coatings are also easier to apply and are less time-consuming than other roof coating types. Polyurethane coatings are also resistant to UV rays, corrosion, and extreme temperatures, making them an ideal choice for metal roofs.
Polyurethane coatings are also highly resistant to water damage and can be easily removed and replaced when needed. While polyurethane coatings may be slightly more expensive than other coatings, the superior protection and longevity it provides make it a worthwhile investment.
Is Liquid Rubber Roofing Any Good?
Liquid rubber roofing is a great choice for those looking for a reliable, long-lasting roofing solution. Its synthetic rubber composition means it is highly resistant to the weather, providing a durable and cost-effective solution for many homes. The material is also extremely low-maintenance and does not suffer from moss or algae growth, thanks to its chemistry.
Liquid rubber roofing is also incredibly easy to install, making it a great option for DIYers, as well as those who need a quick and reliable solution. In addition, its waterproof nature makes it a great choice for areas prone to wet weather. All in all, liquid rubber roofing is a great choice for a durable and cost-effective roofing material.
It is easy to install, low-maintenance and resistant to weathering and moss, making it a great choice for many homes.
How Long Does Liquid Rubber Last on Roof?
Liquid Rubber can provide a long-lasting solution for roofing needs, with many building structures that have been using the product for over 30 years. It has been used in North America and Europe for more than four decades and is known to be reliable and durable. The rubber won’t crack, peel, or weaken over time, ensuring a secure and effective seal.
It is also highly resistant to severe weather conditions, making it a great choice for roofing projects. Furthermore, it is easy to apply and can be used on curved and flat surfaces. Overall, Liquid Rubber can last for many years and is a great option for roofing needs.
Is Liquid Rubber a Good Roof Coating?
Liquid rubber is an excellent roof coating solution for many reasons. It is waterproof, which is essential to keep the roof protected from water damage. It is easy to apply and requires no special tools, making it an ideal choice for DIY roof maintenance.
Furthermore, it is cost-efficient and can last for many years. The fact that is it made from natural and renewable resources makes it an environmentally-friendly choice for roof coating. All in all, liquid rubber is an ideal roof coating material for anyone looking for a waterproof, long-lasting, and cost-effective solution.
What Are the Disadvantages of a Rubber Roof?
Rubber roofs are a popular choice for many homeowners, as they are relatively inexpensive, quick to install, and can last for many years. However, rubber roofing does come with a few drawbacks that should be considered before deciding on this type of roofing system. One of the main disadvantages is that rubber roofs are not as durable as other roofing materials, such as slate or metal.
The material can be easily punctured, cracked, or torn by heavy winds, hail, or other debris. In addition, rubber roofs can be difficult to repair due to the materials used and may require more frequent maintenance than more traditional roofing materials. Rubber roofs are also prone to UV damage, which means they can fade and crack over time.
Lastly, rubber roofing is not as aesthetically pleasing as other roofing materials, so it may not be the best choice for homeowners looking for a roof with a more classic look.
Is Liquid Rubber Good for Flat Roofs?
Liquid rubber is generally considered a great option for flat roofs, due to its waterproof and protective qualities. Liquid rubber is applied in liquid form and dries out to form a protective coating for the roof. This coating is highly resistant to weather and other environmental factors, such as UV rays and water damage.
In addition, liquid rubber is highly durable and can last for decades with proper maintenance. It is also relatively easy to install, making it a great option for those looking to repair their flat roof in a cost-effective manner. Furthermore, liquid rubber can be applied to almost any roofing material, making it a great option for those looking to extend the lifespan of their roof.
How Long Does Liquid Rubber Last on Roof?
Liquid Rubber is an incredibly long-lasting roofing material that can be used to protect and waterproof structures. It is highly resistant to cracking, peeling and losing strength, making it a reliable choice for roofing repair and maintenance. Liquid Rubber has been used for decades in North America and Europe and can be found on many roofs and structures that have been in place for over 30 years.
In fact, some roofs that have been treated with Liquid Rubber have lasted for up to 40 years and beyond. With proper maintenance and care, Liquid Rubber is an excellent choice for a long-lasting roofing material.
What Is the Best Roofing Product for a Flat Roof?
Resincoat liquid rubber waterproof coating is an ideal choice for flat roof repair. It is a high quality product that offers excellent protection against leaks and corrosion. With a liquid consistency that is easy to apply, this DIY friendly coating is flexible and highly elastic.
Additionally, it offers superb adhesion to a wide range of substrates. This makes Resincoat liquid rubber waterproof coating the perfect choice for covering flat roofs. It is durable, reliable and dependable, offering a long lasting solution to any flat roof repair or renovation project.
Its unique combination of flexibility and adhesion makes it the most suitable roofing product for a flat roof. Resincoat liquid rubber waterproof coating is the ideal choice for any flat roofing project.
What Is the Best Liquid Rubber for Flat Roof?
Liquid rubber roofing is an ideal choice for flat roofs. It is durable and reliable, offering protection from the elements for many years. It is also resistant to moss, algae and other organic growth, meaning your roof will stay cleaner for longer.
Liquid rubber is a cost-effective choice and is easy to apply and maintain. It is also waterproof and highly resistant to UV light and chemical degradation. When applied correctly, liquid rubber roofing offers a great long-term solution for flat roofs.
It is also highly flexible, so it can be applied to many different surfaces and can be used in a variety of climates. Liquid rubber roofing is available in a range of colors, so you can create a roof that complements your home’s style. With the many advantages of liquid rubber roofing, it is no wonder why it is the best choice for flat roofs.
Frequently Asked Questions
How Good Is Rubber on a Flat Roof?
Rubber roofing systems are an excellent choice for flat roofing applications. This type of roofing is made from recycled rubber, primarily from used tires, and is 100% waterproof. It provides a layer of protection from the elements and can withstand extreme temperatures, making it ideal for areas exposed to the sun.
Additionally, rubber roofing systems are highly durable and resistant to puncture, so they can last up to 50 years with minimal maintenance. The installation process is also relatively simple, making it a cost-effective choice. Overall, rubber roofing is an excellent choice for flat roofs, as it offers superior protection, is extremely durable, and is relatively easy to install.
Is Rubber Roofing Good for Flat Roof?
Rubber roofing is a popular choice for flat roofs due to its affordability, durability, and ease of installation. It is resistant to the elements, withstanding UV rays, hail, and extreme temperatures. Its low-maintenance nature makes it a great choice, as it does not require periodic cleaning or repairs.
Rubber roofing is also lightweight and flexible, which makes it easier to install than many other roofing materials. It is also highly fire-resistant, providing an extra layer of protection for your home. On the downside, rubber roofing may not last as long as some other materials, and it can be susceptible to damage from sharp objects and hail.
However, overall it is a great option for flat roofs and can provide years of reliable protection.
How Long Does a Rubber Roof Last on a Flat Roof?
A rubber roof on a flat roof can last anywhere from 10 to 30 years depending on the quality of the installation and the amount of maintenance that it receives. Factors like sun exposure, extreme weather conditions, and poor installation can all significantly reduce the lifespan of the roof. With proper maintenance and preventive care, a rubber roof can last up to 30 years.
If a rubber roof is installed correctly and given the proper care, it can last for a very long time, however, if it is not, it can need replacement within 10 years. Regular inspections and maintenance can increase the life of a rubber roof significantly and can ensure that it stays in peak condition for as long as possible.
What Are the Disadvantages of Rubber Roofing?
Rubber roofing can be more expensive than other roofing materials, and installation costs can be higher as well. Rubber roofing may also be less durable than other roofing materials, and may require more maintenance. In some cases, rubber roofing may not be suitable for use in extreme climates where temperatures can reach extreme highs and lows.
Rubber roofing may also be more susceptible to damage from UV radiation, and may require the use of a protective coating to help prevent fading and cracking. Finally, rubber roofing can be difficult to repair, and may require professional help to do so. All in all, rubber roofing can be a good choice for some, but it may not be the right choice for everyone due to the various disadvantages.
What Is the Best Thing to Put on a Flat Roof?
Flat roofs require special considerations when it comes to selecting a material to cover them. The best thing to put on a flat roof is a quality, single-ply membrane. This type of membrane is strong, durable, and flexible, which is important since flat roofs are prone to shifting and movement due to temperature changes.
They also provide superior protection against water, air, and UV rays. Single-ply membrane systems are typically easy to install and require minimal maintenance, making them an economical choice for flat roof coverings. Additionally, they are available in a variety of colors, textures, and thicknesses, so you can find the perfect one to match the aesthetic of your building.
Conclusion
Overall, a metal roof can be a great choice for your home and the best way to waterproof it is to use a liquid rubber sealant. This type of sealant can last for many years and is easy to apply. It has some disadvantages, such as being vulnerable to extreme temperatures, but it is an effective and relatively affordable option.
With the right research and preparation, you can find the perfect waterproofing solution for your metal roof.
