A man’s home is his castle, where safety and coziness make up a perfect getaway from the troubling coils of the outside world. Just like a castle has its protective towers, so does a house have its roof. However, sometimes, the roof can be not in the best condition and let in leaks, water, and the cold. To prevent this from happening, you can always use weatherproof roof coatings.
Now, the question emerges what sealant you should use? Which product to choose among the variety of options? How to apply a silicone sealant? And also, which is the best one?
Top 7 Best Roof Sealants and Coatings in 2021
Since the market is full of products that claim to be a leaking-roof solution, it’s easier than ever to get tangled in all those ads. With myriads of properties, use recommendations, and purposes, it’s hard to find the best roof sealant right away. Sometimes, it takes a long time to pick a solution that does work. But can you afford the time?
That’s why, I’ve compiled a list of detailed roof coating reviews based on my personal experience and hundreds of customer reviews online. Each of the options here is a great treatment for stitching up your house. Pay attention to the table of upsides and downsides to stay on the same page with me. Shall we?
1. KST Coating, White Roof Coat — Best Roof Sealant Overall
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If your roof needs a great-quality coating, this KST Coating is the best roof coating you can find online. It has great anti-bacterial and moisture-proof properties that protect the cover of your house from the mold. Also, it’s perfect for temperature regulation to withstand excessive heat.
The container offers around 5 gallons of pure white coating, which is more than enough to tend a standard-sized roof at least twice. It can cover around 1500 square feet, both manually and using it as a spray. The substance is not gooey but dense and sticky. It coats the roof well, making an even layer that doesn’t form lumps.
As for the composition, the coating is completely elastomeric. It means that its texture is very close to that of regular rubber coatings. It’s hard to damage and, when pressed upon, it reshapes back to its former smoothness.
Thanks to the composition, the coating has great temperature regulation properties. It can withstand high and low temperatures, ranging from 10℉ below zero to 150℉. Now, your house is well-insulated, protecting you from the excessive summer heat and the scalding winter cold.
- Great thermal regulation;
- Easy to spread;
- Can be used for spray-coating;
Could be better:
- Gives off some synthetic odor afterward.
2. Heng’s Roof Coat — Best Rubber Roof Coating for Safety
In case you need a more versatile option for dealing with all kinds of deficiencies, there’s a solution for you. It’s quite eco-friendly with a limited number of toxins that so often happen to be in coatings. Apart from this, there are a ton of other purposes you can apply the product for.
Though the container holds only one gallon of the product, it’s more than enough for sufficient and ergonomic use. With it, you can coat around 30 feet of a surface by applying a thick layer for durability. It goes best with roofs that have already been in use and have some minor cracks or previous insulations.
Among all the liquid roof coatings, this one stands out thanks to its natural composition. When applied, it doesn’t emit toxins or chemicals since it’s made of exclusively processed rubber. The substance is spread easily around the roof and takes less than usual to cool down and solidify.
As for the color, the sealant is completely white with a little gleam after drying out. When solidified, it doesn’t lose its color integrity or gain the egg-shell shade. It remains fresh and white throughout an extended time without needing to be reapplied. Also, it remains smooth, allowing for additional repair work on top of it.
- Sufficient coverage;
- Durable and long-lasting.
Could be better:
- Reduced thermal regulation.
3. Sashco Gallon Clear Sealant — Best Roof Sealant for Versatility of Use
In case you need a shielding sealant for your roof against water and leaks, consider purchasing this product. The sealant is known for its sturdiness and resilience against water, moisture, and dampness. When applied, it can keep any roof dry and secured from both minor and major leaks.
The coating is made of polymers to ensure longevity and prevent wear-offs. With material like this, you can get into the most unreachable cracks, dents, and grooves. The formula is elaborated to be a permanent solution for roofs whose cover isn’t water-resistant enough. It provides an additional layer of a water-repulsing rubber-like coating that seals deficiencies for good.
Polymers have already been used as a substitute for silicone. They have proven to be more heat and water-resilient without melting or losing their integrity under excessive rains or sunlight. To ensure better contact between the roof and the product, make sure to clean the surface of the roof with water and let it dry for some time.
Also, this isn’t just a roof coating for a flat roof since it can be applied to minor deficiencies. You can use the substance as a sealant for gutters, ventilation, tubing, and even concrete. Easy to use and reliable, the sealant can be a life-saver whatever your issue is.
- Great contact with surfaces (no gaps);
- Can be painted over;
- Reasonable price;
- Multiple purposes of use.
Could be better:
- Extremely quick to dry up.
4. Henry HE587372 — Elastomeric Roof Coating for Water Resilience
Not to worry about the aesthetics of your roof, and to make it brand new with a single layer, you can apply this reflective sealant. It offers real durability throughout the year regardless of the weather. Moreover, it doesn’t trap heat or moisture, which prevents dampness, mold, and endless maintenance.
The product is a blend of highly resilient materials, like resin and metal-derived particles, to provide a smooth cover for your roof. A 5-gallon container is meant to ensure the sufficiency of the sealant for roofs of different sizes.
One gallon should be enough to cover around 100 square feet of a flat roof. Since there are 5 gallons in the container, it’s more than enough to coat your roof 3-4 times. However, one application should provide you with a layer thick enough for mending all the minor cracks and dents.
Any tedious roof coating comparison can show how drastically efficient the sealant is when it comes to moisture resistance. The product features a nice air circulation technology that causes water to evaporate 9 times faster than before. It’s done by accumulating heat on the acrylic surface, preventing water from being trapped and spurring mold and bacteria.
- Highly bacteria-resistant;
Could be better:
5. Dicor Dove Rubber — Elastomeric Roof Coating for Impact Prevention
Perfectly suitable for rubber and soft roof surfaces, this coating is great for long-lasting protection from external damages. The sturdiness is backed up by a combination of light and heavy rubber-infused materials. Also, it’s meant for those who don’t really like spending time on roof maintenance now and again.
The product consists of two main components, i.e., prep maintainer and the coating itself. The first one is responsible for cleaning and preparing your roof for the following coating layer. It gets into the cracks to get rid of dirt, solid particles, and moisture. When it comes to the latter, it consists of acryl, which is one of the most widely used RV roof coatings. It adheres to the rubber foundation easily, embracing every dent in the surface.
Due to the reduced maintenance requirements, you can cover over 120 square feet of a roof for a quarter of the time. However, it might be necessary to reapply the substance later. Normally, two appliances should do to secure your roof from damages, wind, and rain impact.
- Two-component technology;
- High adherence;
- Reduces maintenance time.
Could be better:
- Requires two applications.
6. Flex Seal Liquid Rubber — Best Roof Coating with Nature in Mind
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For those of you who prefer classic rubber sealants, here is a superb solution for roof coating. Extremely easy to apply and even easier to maintain, the sealant can serve you longer than ever. It protects the house from all kinds of heat and water-related issues, as well as is made of eco-friendly materials.
The coating is made of organic rubber, which is suitable for people who are highly sensitive to synthetics. Since there are little to no chemicals used for manufacturing, the substance is not toxic. The rubber-infused substance deals very well with dampness and rust. Moreover, it doesn’t produce vapors that can so often irritate airways and the eyes.
Another great feature of this leaking roof sealant is its anti-heat property. Not only does it regulate temperatures well, but it also prevents sudden combustions and burning.
Also, the black-colored coat is versatile and can be used for covering not only roofs but also concrete, wood, etc. It’s safe and friendly for vegetation and animals and can be used around gardens and vegetable patches.
- Organic and clean;
- Fast to dry;
Could be better:
- Excessive odor while drying.
7. Liquid Rubber Indoor & Outdoor Coating — Damaged and Leaking Roof Sealant for Metal
If your roof needs more than just minor insulation, then you might want to consider this multi-purpose product. It combines durability, crack prevention, and elasticity for houses impacted by natural elements. Not only does it help prevent damages, but it also treats those that have been around for a while.
With the container consisting of 5 gallons of pure polymers, you can cover around 75 square feet of both flat and bumpy surfaces. Each coating provides a thick enough membrane-like layer that protects the roof from water, wind, and residues. Also, it’s a perfect metal roof coating since it sticks to even the smoothest surfaces without peeling off or cracking.
The flexibility of the dried substance secures the roof from heavy damages by bouncing them off and reducing the pressure. The same applies to surfaces inflicted by rust because the product seals solid surfaces and cleans them from any particles. Thanks to the decreased drying speed, you can manage to apply a few coats on the same day by making a couple of highly resilient layers, one on top of another.
- Suitable for metal surfaces;
- Great heat resistance;
- Increased elasticity;
Could be better:
- May change the color to brown.
Having a wide range of products to choose from doesn’t necessarily mean that you’re going to make the right choice. You see, even though the best roof sealer can do well for different purposes, it’s still essential to know the basics about your options. For instance, is a rubber coating always efficient for metal and stone roofs? What about water resistance? Does a coating with high potency for water-repelling always prevent leaks and dampness?
Apart from roof sealant reviews, I would like to offer you a short guide. Let’s try to take a better look at the many uses of coatings. Shall we?back to menu ↑
How does a roof coating/sealant work?
Depending on the core material, each sealant is a unique treatment for the prevention and elimination of roof damages, heat, and cold insulation, etc. However, all of them have something in common, that is the effects they have on a roof. So, what kind of tricks do they do?
Mainly, when applied over a roof, a sealant creates a thick membrane that gets into cracks, dents, and other gaps of a roof. Whether you’re using a rubber or an acrylic coating, it provides great thermal insulation. Now, the summer heat doesn’t boil up your house, and neither does the winter freeze it. Moreover, the rubber layer is useful for protecting the top of your house from various elemental impacts.
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Things to consider before buying roof sealants/coatings
Though most coatings are extremely diverse in their uses, there are still properties and features worth minding. When choosing an elastomeric roof coating, pay attention to the manufacturer, expiration day, and, of course, the composition.
Now, let’s take a look at the details that matter when browsing for this product.back to menu ↑
Types of roof coatings
First, make sure to consider the types of common roof coatings you’re going to use. Different sealants make for different problems and, subsequently, different solutions. Here are a few of the most popular ones.
- Silicone-infused products. These are a normal choice for people whose property is inflicted by various water-related issues. It’s great for ensuring that your roof is well-protected from the rain and moisture.
- Acrylic-based products. If you’re looking for a better insulator, then consider acrylic sealants. They deal superbly with excessive heat, as well as harmful ultraviolet radiation both for the inside and outside of buildings.
- Polymer products. Such coatings are extremely elastic and durable. They suit greatly for people who tend to spend too much time on the rooftop. Also, these products are very damage-resilient, as well as low-maintenance.
- Bitumen-infused products. Thanks to a blend of hydrocarbons and rubber, such coatings are smoother and more reliable than regular risen coatings.
Second, it’s essential to pick a coating that goes with your current roofing materials. Mind, not all roof covers can be matched with modern coatings.
- Flat. If you have this type of roof, you’re in great luck. Here, there are few limitations for what coating you can use if, of course, your roof is meant for it. Moreover, such roofs are normally made of stone, thus being compatible with any coating of high adherence.
- Wood. Regardless of the shape, if your house covering is made of wood, you have to pay close attention to the sealant. Because wood can be very resistant to polymer and silicone due to its low adherence, you might want to consider acrylic or polymer. They stick well to most surfaces without losing their elasticity.
- Metal. Dealing with metal is rather complicated not only because very few coatings can attach well enough but also because the metal is a superb heat conductor. Here, you’re going to need a coating that does well with high and low temperature since you don’t want your sealant to peel off in a few days.
The durability question is too dubious to declare a certain sealant the best one, whereas the other is the worst.. Here, you have to look at the features you’re in need of, as well as the functions a coating offers. For instance, you have a constant problem with your current coating because of water leaks, then you need a waterproofing solution. Both acrylic and polymer options will do.
However, they might not be the best option in case the roof is always trodden upon. Here, you will need a material that offers a robust, tough surface to withstand pressure. Try applying bitumen or silicone treatments and make sure to treat all the cracks you can find, for even the best elastomeric roof coating won’t last if there are too many weak spots underneath.
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Another important feature is the capacity of a sealant to repel the sunlight. Because the roof always absorbs the most light during the day, it’s responsible for the sheer amount of heat. As a result, the house is heated up like a frying pan unless there is an efficient sealant.
Good quality coatings are meant to provide great temperature regulation properties. They are capable of absorbing up 90% of the light, thus decreasing the temperature inside the house. One of the most well-known insulating sealants is rubber. Though it heats up easily and can be rather hot to the touch, it traps the heat mercilessly. By trapping it, it doesn’t allow the scorching temperature to escape underneath.back to menu ↑
As mentioned above, waterproofing is an essential part of protecting your house from external impacts. Whether it’s the rain, snow, or hail, your house can stand long and well if it’s topped with a resilient solution. But estimating the best water-proof coating is not that easy.
The ability to repel water comes from a coating’s composition, the dense the material is, the better it is at dealing with water. On the other hand, it’s also conditioned by the durability of the material. For instance, polymers and acryl can serve twice as long as regular asphalt coatings, resist high temperatures, and soak into the deepest cracks.back to menu ↑
Ease of application
The process and, consequently, the complexity of the application depends on how bulky a coating is. Gooier sealants don’t require any special equipment for being applied since they are to be leveled with the roof’s surface. Whereas, materials like asphalt and bitumen might take longer to spread, level, and dry.back to menu ↑
Apart from the core components, some solutions can contain other elements. These ingredients determine the smell, color, and other properties. For instance, some coatings are infused with anti-bacterial treatment to prevent or deal with already-existing infestations.back to menu ↑
When applying a solution, make sure to follow the safety guideline prescribed to it. Also, it’s essential to wear protective gear, like gloves, eyewear, and a mask. To ensure safety, keep animals and children away from the application area until it’s completely dry.
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Tips for applying roof sealants
Applying a coating is not anything new. There is no need to discover the wheel again, so follow these helpful tips to save time, money, and efforts.
- Make sure to pick the right coating. Determine what matters to you the most in your roof’s maintenance and what you need the sealant for. This will help you narrow down your search, as well as avoid wasting your money on rip-offs.
- Prepare the work surface. It’s highly inadvisable to apply any product without getting rid of the trash, leaves, and dust that like to collect on the roof. Otherwise, your product might just not adhere well.
- Fix the surface up. If you have any major damages, like cracks, scuffs, holes in the roof, stitch them up. This will improve the integrity of your membrane, leaving fewer weak spots.
- Look up. You wouldn’t like to start applying the solution without making sure that it won’t rain. Though your coating can be water-resilient, it’s no use when it’s still wet.
- Use a variety of tools. Don’t limit yourself to using only a roller since there is a whole wide range of utilities that can facilitate the application. Yes, it will be messier should you utilize many tools, but you will save time and effort.
- Double the effect. Though a product may guarantee a perfect membrane after the first application, it’s better to apply another layer on top. This way, your coating can have double the effect you expect of it, thus being more durable and reliable.
- Let it dry. Whether you’re going to use one or two layers, it’s essential for each membrane to solidify. If you distort a coating while it’s all sticky and wet, you cause holes or unevennesses, which can influence the overall efficiency.
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There is so much more I could tell you about universal treatments, metal surfaces, and even RV roof coatings. To put some more information in a nutshell, here are a few other things you might be wondering about.
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Do roof coatings work?
Yes, they do. In fact, a bare roof without any additional protection can cause more harm than good. Not only doesn’t a sealant increase a roof’s durability and efficiency, but it also prevents damages, insulates the heat, and reflects harmful UVs.back to menu ↑
What is an EPDM rubber roof?
An EPDM rubber roof is a rooftop covered with EPDM, which is one of the most robust coatings to find so far. It consists of a couple of ingredients, which are various permutations of gases and oils. The sealant is considered rather effective due to its adherence and thickness level.back to menu ↑
How to apply an RV roof coating?
Normally, it’s done in the same way as for a regular roof. However, RVs have a metal covering, which complicates the process a bit. To ensure full adherence, clean the surface completely, and let it dry. Also, cover the area around your RV with canvas to prevent staining.back to menu ↑
When to replace a metal roof?
All in all, a metal roof can provide efficient services for over 4 decades. When maintained and taken care of, there shouldn’t be any major issues with them. However, if you see that your roof is inflicted by corrosion, causing feeble spots and holes, it should alarm you right away.back to menu ↑
Seal off Your House for Good
Roof treatments against moisture, heat, and elements aren’t a luxury anymore but a simple necessity. They keep your house safe from various impacts, which otherwise can turn out to be unpleasant, costly, or even life-threatening. A good-quality coating can prevent you from sacrificing your comfort and safety simply by being there for you.
Anyway, I’d love to hear what you think about different types of coatings. Do you think a bitumen sealant can be more durable than the asphalt one? Also, what footage have you covered with your acrylic product? Scroll down and leave your comments!