The roof of your RV easily receives the most weather exposure of any part of your RV. As a result, it is an area that often becomes compromised in a lot of older rigs.
The main reason for that is because many RV owners don’t regularly apply an RV roof sealant and coating that protects it from UV rays and water damage.
Once water seeps into an RV roof for any period of time, it’s nearly impossible to reverse the effects of the damage it will cause to the roof structure.
Dry rot and a host of other issues can cause an RV roof to leak or sag in certain spots. And if you start noticing a sagging roofline in your RV, it’s already too late.
That’s why you need a quality RV roof sealant and coating to be applied on a regular basis to protect your RV roof.
When used as directed, sealant and coating will preserve the integrity of your RV roof and extend the life of your RV as a whole.
To aid in your search, we’ve researched the market and compiled a list of the best RV roof sealant and coating options for a variety of applications.
Once you check out these products, be sure to read through our comprehensive Buying Guide to learn how to choose the best RV sealant and coating for your unique needs.
8 best RV Roof Sealants and Coatings reviews
Speaking from experience, it can be super annoying to apply a roof sealant only to have it start peeling a few months later.
So I’ve done my homework to bring you more reliable options than I’ve personally had the unfortunate luck of using in the past!
Here are the top 8 Best RV coatings and sealants to fix a leaking roof on an RV:
- Best Overall: Dicor 95D40-35 Epdm RV Rubber Roof coating
- Best For Metal or Fiberglass Roof: Dicor RP-MRC-1 Elastomeric Coating
- Best For Spot Sealing: Heng's Rubber Roof coating for RV
- Best For Leak Repair and Seam Sealing: EternaBond RSW white RoofSeal Sealant Tape
- Best Budget-Friendly: Geocel GC24201 Pro Flex RV coating
- Best For Roof Edges: Dicor 501LSW-1 Self-Leveling Lap Sealant
- Best Pour-On Application: Flex Seal rubber coating for RV
- Best To Prevent Adhesion Failure: Liquid Rubber Waterproof RV Roof Coating
1: Dicor 95D40-35 Epdm Rubber Roof coating
If you need to apply a new layer of coating to an EPDM rubber RV roof, the Dicor Corporation EPDM rubber roof is an excellent choice.
It’s also suitable for rubber TPO roofing and it does require the pre-application of Dicor’s Cleaner/Activator for EPDM rubber roofing in order to ensure a strong bond with your roof material.
This coating comes in a one-gallon size that can cover up to 125 square feet of RV roof surface.
It’s compatible with all rubber RV roofs and helps to eliminate irritating roof rumble that can cause extra noise (and annoyance!) while you’re driving.
This is an acrylic coating with excellent water and UV resistant properties. It also contains fire retardant characteristics for a greater degree of protection.
You’ll need to apply two coats in order to achieve maximum effectiveness, so be sure to double the measurements of your RV’s roof surface to make sure you have enough coating solution for proper application.
When you’re applying this coating, don’t be surprised if your nose picks up a faint ammonia-like odor.
If you think this might bother you, be sure to wear a mask or other face-covering that protects you from the smell.
But it doesn’t have a high freezing point, which means you can apply this solution at lower temperatures, as long as it doesn’t dip below freezing.
A couple of other things I like about this coating include its flexibility and lifespan.
It flexes very well so that it won’t crack or flake when exposed to the movement of your RV.
And it also requires less lifetime maintenance than other coatings, which means more time adventuring between applications.
Best For Metal or Fiberglass Roof
2: Dicor RP-MRC-1 Elastomeric Coating
If your RV has a metal or fiberglass roof, the Dicor Corporation Elastomeric Coating is an excellent way to add another layer of protection against the elements.
This acrylic coating contains 100% acrylic elastomeric resins and comes in a one-gallon container with a super bright white color.
Once applied, it forms a rubber-like coating that will expand and contract along with the movement of your RV roof.
The natural expansion and contraction of this coating help to reduce the likelihood of cracks or tears forming over the life of the product.
The coating is also resistant to both mildew and algae formation.
Because this coating will be bright white when you’re finished with the application, it may appear dirtier than others.
But it easily cleans up with water and a mild detergent when you need to clean it to improve that appearance. To achieve maximum effectiveness, you’ll need to apply two coats.
One gallon of this coating is enough to cover up to 200 square feet of roof space.
And because you’ll need to apply two coats, you’ll need to make sure you purchase enough quantity to cover your entire roof twice.
The application process for this coating also requires a clean surface and the removal of any rust if you’re working with a metal roof.
For metal roofs, the application of a primer might be required to achieve a stronger bond.
This coating should also be applied when temperatures are above 50 degrees Fahrenheit (10 degrees Celsius).
Best For Spot Sealing
3: Heng's Rubber Roof coating for rV
Heng’s RV Rubber Roof Coating is best used for sealing around vents and air conditioner units on top of your RV.
It’s also great for re-sealing seams and tears in your existing RV rubber roof. It’s compatible with both EPDM rubber roof and rubber TPO for more versatile applications.
Although it’s not made to be a solution for resealing an entire RV roof, this is a great option if you just need a more affordable way to seal small tears or seams in your RV roof.
It’s super easy to apply and simply rolls or brushes on like thick paint. You won’t need to apply any sort of activator beforehand, although you should make sure the area you need to seal is thoroughly clean and completely dry before applying.
As a nature lover myself, I appreciate the fact that this coating is made with non-toxic and non-polluting chemicals.
This makes me feel less guilty if I get a little heavy-handed and accidentally spill a little on the ground while applying it.
I also like that it offers excellent impact resistance if you park your RV in a spot where pine cones or other projectiles are likely to fall on the roof occasionally.
Although it’s only rated to cover about 100 square feet of surface area, Heng’s is more suited to spot applications.
So if your RV roof doesn’t necessarily need to be completely resealed, this is a great choice to help you address those few problem spots before they grow into a larger issue.
Best For Leak Repair and Seam Sealing
4: EternaBond RSW white RoofSeal Sealant Tape
If you’ve found yourself in the unfortunate position of noticing a leak and needing a repair solution, check out the EternaBond RoofSeal Sealant Tape.
This tape isn’t necessarily designed for preventative roof maintenance, but it will help you stem the tide if you already have minor leaks in your RV roof.
This sealant tape is a regular choice of many roof repair specialists because it can bond to almost any RV roof type.
This includes EPDM, TPO, all metals, most PVC, and a variety of other roofing materials.
It’s even rated to be especially stable when exposed to UV radiation, with products being tested and rated to last up to 19 years in full sunlight.
This tape comes in strips that are four inches wide and 50 feet long. Each strip contains a built-in primer that allows for a stronger bond with whatever surface it is applied upon, although it’s still recommended to thoroughly clean and dry the surface around the leak before applying the tape.
The strip design of this tape actually makes it a great solution for sealing all of the seams along the edges of your entire RV roof.
These seams are notorious for leaking in older RVs and extra sealing is often required in these areas.
This tape will give you a permanent watertight seal along those seams and can be installed at temperatures down to -20 degrees Fahrenheit (-28.89 degrees Celsius).
5: Geocel GC24201 Pro Flex rV coating
The Geocel Corporation Pro Flex RV Instant Repair coating is the best option I could find if you’re needing to stop leaks in your RV roof but you’re on a tight budget.
It’s the most affordable option I could find but it’s also specifically designed for metal roofing systems.
It’ll work, however, on steel, wood, vinyl, sheet metal, and other common substrates.
As its name suggests, it’s made for stopping leaks fast and it’s also useful for sealing breaks, seams, splits, or holes in metal roofing.
When a leak crops up unexpectedly (and maybe at an inopportune moment), this solution will seal it fast and prevent your RV roof from sustaining further damage that will be more expensive to repair.
After applying this Instant Repair, your RV will be road-ready in under one hour. So you can keep rolling or continue your RV living worry-free.
It only requires a single coat for effective application and can be applied in adverse weather conditions, including low and high temperatures and icy or wet conditions.
This sealant comes in a one-gallon size and it can be painted directed onto metal RV roofs.
Once cured, it has mildew and UV-resistant properties and it’s durable enough to hold up under intermittent foot traffic when you need to walk on your roof every now and then to re-inspect its integrity.
I also really like that this sealant doesn’t require any primer to achieve a strong bond with your metal roofing material.
This will save you time in the application process, even if you need to clean the area you’ll be applying it to thoroughly and ensure that any rust is removed if you want to achieve a strong bond and an effective seal.
Best For Roof Edges
6: Dicor 501LSW-1 Self-Leveling Lap Sealant
If you only need to seal small areas along the edges of your RV roof, the Dicor Corporation Self-Leveling Lap Sealant is much more affordable than a paint-can style sealant.
And it’ll also work well to seal around vents, air conditioners, roof antennas, and anywhere else that water may leak into the substructure of your RV roof.
This sealant is best suited for EPDM rubber roofs or rubber TPO, but it will also adhere strongly to aluminum, mortar, wood, vinyl, galvanized metal, fiberglass, and concrete.
It is compatible with other Dicor Products and may be used after their Cleaner/Activator and EPDM Rubber Roof Coating system, respectively, for a full roof sealant solution.
You’ll need a caulking gun to apply this sealant and it has self-leveling properties to help with a smoother, more complete seal where applied.
Each tube contains 10.3 ounces of sealant and that small quantity will mean you might need a good number of tubes to seal the edges or seam around your entire RV.
For example, one user used a total of five tubes to seal the edges around a 13-foot trailer.
So, extrapolating that number out, you’d need 10 tubes for a 26-foot RV and a minimum of 14 tubes for a 33-foot rig.
Furthermore, this sealant is rated to be reapplied every three months or so for maximum effectiveness.
This means that you might need to spend more time applying this sealant than you’d need with other solutions.
If you do go with it, however, make sure you apply the sealant when outside air temperatures are between 50 and 70 degrees Fahrenheit (10 to 20 degrees Celsius). Doing so will help you maximize the lifetime of the sealant.
Best Pour-On Application
7: Flex Seal rubber coating for RV
Many of us know Flex Seal products ‘As Seen on TV’, but the Flex Seal Liquid Rubber in a Can really does offer one of the easiest pour-on applications of any RV roof sealant and coating.
It comes in a one-gallon size with a white color that provides great reflectivity to keep the temperatures down inside your RV once applied.
Just like you might’ve seen in one of their infomercials, this stuff sets up quickly to stop leaks fast.
One gallon of this solution is enough to cover about 150 square feet of RV roof area, so you might need two gallons for a complete application, depending on the total roof square footage of your particular rig.
Once it sets up, it forms a watertight, flexible rubber coating that effectively seals your roof from moisture and also protects it from damaging UV radiation.
It’s also super-safe to apply as the solution itself is non-hazardous, non-toxic, and non-flammable.
It also protects your roof from mildew growth and damage that can occur from exposure to other chemicals.
Additionally, it prevents rust and corrosion from occurring on metal roofing systems, which maximizes the lifespan of that roofing type.
While it’s rated to work well with a variety of roof substrates, it hasn’t been tested on top of an elastomeric roof coating, so you might want to apply a small amount to a test area before utilizing this solution if you’ve previously applied this type of coating.
And finally, another thing that impressed me about Flex Seal is how it works to minimize noise and vibrations while you’re driving to provide a smoother, quieter ride.
As someone who’s had to repair a roof leak with Flex Seal at midnight in the middle of a Texas deluge, I can also personally vouch for the reliability of the Flex Seal brand.
Best To Prevent Adhesion Failure
8: Liquid Rubber Waterproof RV Roof Coating
For those that have previously used an RV roof sealant and coating that didn’t quite hold up the way you expected, the Liquid Rubber RV Roof Coating is our choice for a solution that will form a strong bond with your RV’s roofing material.
This hopefully prevents the need to reseal your roof before you’re ready to get up there again.
This sealant is available in one-gallon and five-gallon sizes so that you can be sure you have enough to cover the total square footage of your RV roof.
A single gallon of this coating is designed to cover only 50 square feet of RV roof surface.
Additionally, it’s recommended to applies two to three heavy coats of this sealant to achieve maximum effectiveness.
To do a little math, you’ll need a five-gallon container to cover a maximum of 250 square feet with those 2-3 heavy coats.
This is typically enough to cover a 30-foot RV, but if you have a larger rig you’ll need even more quantity.
So be sure to factor this in when considering this as a viable solution to seal your RV roof.
On the plus side, this is a truly preventative RV roof sealant and coating.
It’s UV-stable to prevent the sun from damaging your roof substrate and it reflects solar rays to keep the inside of your RV cooler during the summer months.
The solution itself boasts 1000% elongation, which serves to prevent adhesion failure and create a strong bond with your roofing material.
You’ll also enjoy an easy application process with this sealant. Simply pour it on your roof and spread it evenly using a paint roller.
You may need a smaller paintbrush for edging work, which is actually recommended to do before covering the main flat surface of your roof.
It’s also recommended to apply this coating at temperatures above 50 degrees Fahrenheit (10 degrees Celsius).
Features To Look For In RV Roof Sealants
Now it’s time to get into the nitty-gritty of RV roof sealant and coating. You should be careful to consider each of the factors outlined below when comparing and contrasting your sealant and coating options.
Types of RV Roof Sealant & Coating
Let’s begin our Buying Guide by providing some brief definitions of the various types of roof sealants and coatings that you’ll find out there.
RV Rubber Coating
RV rubber roof coatings are the most common type on the market today. They’re actually available in two distinct classifications.
One is primarily constructed from thermal poly Olefin and the other is made of ethylene propylene monomer.
The differences in the construction of these two types of rubber coating require different application and maintenance procedures.
Just make sure you understand the specific procedures recommended by the manufacturer before finalizing your purchase decision.
This is one of the more affordable types of roof coatings out there that will still do a decent job at sealing your RV roof.
The application of most acrylic coatings requires two coats. The first is the primer and the second is called a ‘fabric reinforce’. These two coats help with reflectivity, leak protection, and UV resistance.
The downside of the acrylic coating is that it doesn’t do very well in super wet climates. If your RV roof is frequently wet or develops pools of water, an acrylic coating is more likely to degrade and begin to peel off.
Silicone coatings are typically sold by the gallon and they can be one of the more pricey coating options out there.
The added cost comes with benefits, however, as this type of RV sealant only requires a single coat to be effective.
This means less application time and it eliminates the need for a primer, which can also bump up the overall cost of resealing your RV roof.
Silicone coatings have high reflectivity and resistance to both wind and weather degradation.
They also stay elastic for quite some time after application, which means it won’t become too hard or brittle and begin to peel off within a few months.
Liquid RV roof coatings tend to offer natural water repellency, which serves to prevent corrosion from occurring on your RV roof.
This type of coating is also very easy to apply and can often be poured directly onto your roof before being spread out evenly.
The application method for a liquid coating is very similar to applying a fresh coat of paint to a wall in your home.
You can use a rolling brush to apply it to a large surface area like your RV roof. Liquid coatings are also UV-resistant and can improve the visual appearance of your RV roof.
Fiberglass coatings offer financial advantages because they generally require less maintenance over time than other types of RV coatings.
But this type of coating does tend to require more initial effort to apply and can be more expensive at the outset than other coating types.
Finally, fiberglass coatings also add significantly more weight to your RV roof, which can sometimes cause issues if the structural integrity of your roof is even slightly compromised before you apply this type of coating.
Urethane coatings are more durable than both acrylic and silicone options. They also provide excellent impact resistance if you frequently store your RV in an area with some potential for pine cones or other projectiles to fall onto the roof (which I don’t recommend!).
This type of coating also offers good UV resistance and reflectivity while being able to remain intact if exposed to excess moisture for long periods of time.
But the downside of urethane coatings is the strong and often unpleasant odor they can produce during the application process. Urethane coatings also tend to be more expensive than other coating types.
Your Roof Material
The four main materials used in RV roofs are EPDM rubber roof, rubber TPO, aluminum, and fiberglass.
The composition of your RV roof determines which sealant/coating products can be used on it.
If you’re not sure which type of material was used in the construction of your RV roof, it’s time to climb up there and have a closer look!
Aluminum roofs are hard to the touch and, while it’s the rarest type, they are very obvious due to their metallic sheen (think Airstream!).
An aluminum roof rarely requires a new coating because of its natural durability and weatherproof qualities.
Fiberglass roofs are also hard to the touch and slightly more common than aluminum roofs, but not by much.
Clearly, fiberglass roofs don’t have the metallic appearance that you’ll see with an aluminum roof, but they’ll also be noticeably harder than a rubber roof and they tend to require less overall maintenance than rubber roofs.
Rubber EPDM (ethylene propylene diene monomer) and Rubber TPO (thermal poly Olefin) are the most common RV roof materials.
The differences between these two types, however, are difficult to discern from the look or feel alone.
So be sure to consult the owner’s manual for your RV to determine exactly which material was used in your roof’s construction.
The answer you find will dictate the exact type of RV roof sealant and coating product you’ll need to ensure a strong bond.
The durability of an RV roof sealant or coating product is determined by how often you’ll need to reapply it.
For example, you can be safe in assuming that a product that recommends re-application every six months is going to be less durable than an alternative that only needs to be reapplied every two years.
Depending on the application process of the specific product you choose, it might require a full weekend for a proper application of a sealant/coating.
So it’s obvious that you probably don’t want to repeat that process very often because, if you’re like me, you’d rather be off enjoying new campgrounds and scenic byways in your RV.
The durability of liquid sealants and tapes also depends on their elasticity and tear resistance.
Because your RV will naturally twist, turn, and bounce around while you’re driving, the sealant/coating your apply to your roof must be able to twist and turn without becoming compromised.
Your RV’s roof is constantly exposed to the sun unless you put a cover on it for part of the year or you live in Washington (Sorry Washingtonians!).
Over time, UV exposure can lead to significant wear and tear that can be difficult to reverse if you haven’t regularly maintained your RV roof.
Because of this, you need a roof sealant/coating that offers UV protection. But fortunately, most of the best RV roof sealant and coating solutions are designed specifically for this purpose.
If a specific product doesn’t mention UV resistance, however, it’s a good bet to steer clear of it.
Ability to Repel Water
Water-resistance is one of the primary functions of an RV roof sealant and coating.
Water pooling on the roof of your RV or leaking into the substructure can cause damage that will require a much more expensive fix than what you’d spend on a quality roof sealant or coating.
Most of the best RV roof sealant and coating solutions offer a high-degree of water resistance because this is exactly what they’re designed to do!
But because there’s not really a universal metric by which you can compare the water-resistance of one coating versus another, the best way to analyze a coating’s effectiveness on this metric is to read through consumer reviews.
Ease of Application
Consider the application process required before choosing a roof sealant or coating.
The easiest applications involve a single coat and the use of a squeegee or paint roller to spread the solution evenly over your roof’s surface.
More complication applications require multiple coats and the additional purchase of a primer or other solution in order to ensure a secure bond.
If the RV roof sealant and coating you’re interested in requires additional products for proper application, just make sure you’re aware of that and factor the cost of those additional products into your total budget for the project.
The chemical composition of an RV roof sealant or coating plays a large role in the safety precautions you’ll need to take when using it.
Many of the best options utilize non-toxic chemicals so that they’re safer and easier to use.
However, this isn’t the case for all sealants and I simply want to make sure you consider each sealant’s chemical composition so that you can ensure your own safety and the safety of anyone else helping you apply it to your RV roof.
Choosing a sealant/coating that uses non-polluting chemicals also ensures less likelihood of negative environmental impact when/if the coating degrades and begins to crack or flake off.
As always, we RVers who love to visit beautiful places in our rigs should always be considered about the environmental impacts of our travels.
So, Which is the best sealant for RV roofs?
There are a few good reasons why we chose the Dicor Corporation EPDM Rubber Roof as our pick for the best overall RV roof sealant and coating.
For one, EPDM rubber roof and rubber TPO are the most common roofing materials used in modern RV construction.
And Dicor’s complete rubber roofing sealant system is specifically designed for resealing these types of roofs correctly the first time around.
This sealant is also great for reducing UV damage and minimizing roof rumble so that you enjoy a smoother, quieter ride once it cures and you’re back on the road.
Furthermore, we chose it because it helps to ensure the safety of your RV (and everyone inside it!) with its fire-retardant characteristics.
But if you’re looking for a solution with a super-easy pour-on application, you also won’t go wrong with the Flex Seal Liquid Rubber In A Can.
This RV roof sealant and coating offers one of the simpler application processes of any solution.
Simply pour it directly onto your roof and spread it evenly using a standard paint roller.
You may need to use a smaller paintbrush to complete the edging work, but you should still be able to apply this coating in an hour or two on a warm day.
Frequently Asked Questions
These RV roof sealant and coating solutions aren’t complicated. But I can assure you that the fun is only just beginning once you’ve identified the right product for your needs.
So let’s cover some frequently asked questions about the roof sealing and maintenance processes.
What is an EPDM rubber roof?
EPDM stands for ethylene propylene monomer. It is a synthetic membrane that often comes in strips ranging from 7.5 to 50 feet long and 45 to 60 millimeters thick.
The material’s primary ingredients (ethylene and propylene) are derived from oil and natural gas.
EPDM rubber roof strips typically need to be secured at the edges using a liquid adhesive or specially formulated tape.
This material has been a trusted choice for low-slope roofs in the construction industry for over 40 years.
How to apply an RV roof coating?
The simple answer is that the application process will depend on the product you choose. Different types of coatings have very different application requirements if you’re going to obtain a quality bond between the sealant and your roof material.
That being said, the realistic first step you need to take before applying any type of roof coating is to measure your roof and understand just how much square footage you need to cover.
If the coating you’re buying requires the application of two coats, you’ll need to double the square footage of your roof in order to make sure you buy enough sealant for two coats.
You’ll also need to prep your roof before applying any type of sealant or coating.
Most products will bond better to a clean surface, so it’s recommended to power wash or thoroughly scrub your RV roof with soap and water and allow it to dry completely before applying a sealant.
If there are any pieces of your old sealant that are loose or flaking, you should carefully remove them before applying a fresh coating.
Additionally, many RV roof sealant and coating solutions contain flammable properties. So make sure to remove any potential source of ignition before beginning the application process.
And finally, many new RV owners make the mistake of wearing shoes up onto their roof when going to apply a fresh coat of sealant or coating.
What can happen if you do is that you actually end up tracking up more dirt or debris that you then seal into your roof and this can compromise the effectiveness of your sealant.
It’s always a good idea to pop your shoes off and just wear socks while applying roof sealant or coating to your RV.
Otherwise, you can invest in shoe covers that easily pull over your shoes before you step onto your roof.
What are the best RV roof sealant brands?
For starters, there’s a good reason you’ll find three different sealants and coatings made by Dicor Corporation in our reviews.
Many Dicor products include a roof cleaner/activator that actually preps your roof for the application of the sealant.
This ensures a more lasting bond between the coating and your roof material.
Other brands you can trust include Flex Seal, Liquid Rubber, EternaBond, Geocel Corporation, and Heng’s.
Can I use Flex Seal on my RV roof?
Unequivocally yes! Flex Seal is widely considered to be one of the more versatile products out there and is capable of adhering to a variety of roof materials, although its best for use on metal or fiberglass roofs. This includes around vent pipes, skylights, and RV roof gutters.
One reason why Flex Seal is so effective is its ability to naturally seep into (and seal) cracks and holes.
It also retains its elasticity very well even once fully dried, which helps to promote better flexibility, water resistance, and durability.
If your RV has an EPDM rubber roof, however, you’ll be better suited with a product like Dicor Corporation’s EPDM rubber roof coating.
How does roof sealant/coating work?
An effective RV roof sealant/coating seals your roof from the elements, including ice, rain, wind, snow, and other forces of Nature.
It has waterproof properties and many also add impact resistance to your roof in order to protect it against falling leaves, branches, pine cones, and other projectiles.
Furthermore, an RV roof sealant and coating prevents damage to your roof that can occur from prolonged UV exposure.
And it can also prevent water from leaking into the inside of your rig and reduce heating and cooling loss to keep the interior of your RV at a more comfortable temperature year-round.
Take it from someone who has experienced the downfall of an RV roof.
Once you start to notice sagging in your roof, you’re already looking at a much more expensive fix than what you’ll need to spend on a quality RV roof sealant and coating solution.
At that point, there’s little you can do to salvage the integrity of your roof.
Also, be sure to follow the manufacturer’s recommendations for the air temperature required for effective application.
I’ve applied sealants when the air was far too cold in the past, which effectively turned out to be a complete waste of product.
So even if you have to wait a few weeks, you’ll still be able to make the most of your investment.