Best RV Roof Coating Sealants

Published Categorized as RVs

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The sun and other elements have a lot of natural wear and tear on any vehicle, RVs included. Roof sealants can help prevent leaks and keep things functioning properly on top of your RV for years to come. Here is our research on the top RV roof sealants, which can go a long way to keep your RV looking great and functioning well.

Our Seal of Approval: The Best RV Roof Coating Sealants

Best RV Roof Coating Sealants Category
Dicor 501LSW-1 Lap Sealant Good Value Rubber Roof Sealant
EternaBond RSW-4-50 RoofSeal Sealant Tape Roof Sealant Tape
Proguard F99911 Liquid Roof EPDM Rubber Roof Coating
Dicor RPFRC1 Fiberglass Roof Coating Fiberglass RV Roof Coating
Geocel GC28100 Pro Flex Most Flexible RV Sealant
ToughGrade Self-Leveling RV Lap Sealant Self-Leveling Sealant

A Deeper Look at The Best Options

Here are some of the best RV roof sealants to help protect your roof and keep the inside of your RV dry.

Best Value Rubber Roof Sealant

Dicor 501LSW-1 Lap Sealant


Dicor is one of our favorite sealants for rubber RV roofs and is a personal favorite of Brian, our RV expert, who wrote about using it recently in his guide on how to repair your RV roof. This rubber roof sealant comes in white and it serves as a caulking and sealant designed to remain flexible along cracks. If you find yourself dealing with spider cracks or even large ones this sealant is easy to apply and it works well on all types of materials.

The main issue that a lot of people have with rubber sealant like this is that it gives their RV a cheap or old appearance. This RV rubber roof coating blends nice and leaves a professional look.

One misconception is that you can use this sealant on vertical cracks and that it will spread on its own but that is not true. The lap sealant is for horizontal cracks and it requires you to spread it on your own it you want a clean finished appearance.

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  • Works well on a majority of surfaces
  • Perfect around vents and fans
  • Durable and long-lasting


  • Not for vertical cracks


Best Roof Sealant Tape

EternaBond RSW-4-50 RoofSeal Sealant Tape


Some folks might want to look towards an easy and simple solution to your RV crack problems.

This RV roof repair solution works like a charm. It’s a sealant tape that allows the seal to expand and contract based on the conditions you’re dealing with that day. If you’re someone who travels frequently from cold to warm conditions you might want to look into this solution.

Something I personally like about this option is that you can easily cut the tape to make sure you get the perfect fit. If you mess up and you don’t get the measurement right you could peel it off, adjust accordingly, or simply try again.

That said, the tape does not peel off easily (which is a good thing) so I recommend trying to get the measurements right the first time around.

You have a couple different purchasing options based on how much tape you need. You can buy 50 feet of either two, four, or six inch wide tape. I’d recommend keeping some of this in your trailer at all times.

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  • Easy to install
  • Simple to adjust
  • Allows expansion and contraction based on conditions


  • Not a professional looking job


Best EPDM Rubber Roof Coating

Proguard F99911 Liquid Roof


Sometimes going for a standard EPDM liquid is the right choice and you’re better off fixing the problem right off the bat. You can use this for a new rubber roof and you can also use it to repair cracks or damages to an existing rubber roof. The primary upside of this solution is that it only takes one coat and it leaves a beautiful and professional look.

The coating has a five year warranty and it comes with a one gallon kit that covers as much as 45 square feet in one coat. Another pro here is that you get up to 300 degrees Fahrenheit of heat protection. Overall, this seems like the best option.

The only downside is the process of installing it. You’ll have to get on the roof and install it as you would if you were painting the roof of your RV. You can’t beat the finished look on the Proguard Liquid Roof though. It really does leave a professional looking job and you know you won’t have to worry about it for a while.

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  • Professional appearance
  • Beautiful white color
  • Not too thick or thin


  • Involved application process


Best Fiberglass RV Roof Coating

Dicor RPFRC1 Fiberglass Roof Coating


If you need a fiberglass coating then you’ll want to take a look at this option. This one gallon container applies like the previous rubber coating but it’s intended for fiberglass RV roofs instead.

With this one you’ll get a beautiful white color as well and it contains 100% acrylic resin so it’s flexible and protective against UV rays. Something I love about fiberglass RV roof coatings is how easy they are to clean. With a simple spray down every couple days you’ll have no problem getting any dirt, grime, or mildew off this material.

You can use this as a protective coating for your new RV roof and you can also use it to seal cracks and gaps to give your roof that “out of the showroom” appearance.

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  • UV protection
  • Looks professional
  • Flexible and durable


  • Involved installation
  • Fiberglass only


Most Flexible RV Sealant

Geocel GC28100 Pro Flex


Here we have a trim touch up style sealant that works well on small cracks and gaps in your RV roof. The reason this sealant is so popular is because of its flexibility. It’s not a water-based sealant but it is incredibly sticky so you want to make sure you have plenty of tools nearby to get a clean application and for clean up purposes.

Directly from the Geocel website, they recommend not applying it to any traffic areas or along skylights which is a significant area that RVers experience cracking and gaps.

One thing I love about this sealant is the consistency. It’s thick and sticky as could be which makes it somewhat challenging to apply but you’ll get the hang of it over time. You still have plenty of time to shape and mold it once you apply it.

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  • Simple to use
  • Great consistency
  • Long lasting and durable
  • Ideal for cracks


  • Not for severe cracks or issues
  • Not clear


Best Self-Leveling Sealant

ToughGrade Self-Leveling RV Lap Sealant


Our last recommendation is a self-leveling sealant that works great along roof edges and around vent covers. The product is UV-stabilized to reduce deterioration and discoloration for a professional appearance.

One upside of this material is that you can use it with any type of roofing material. It works with aluminum, mortar, vinyl, and even concrete.

While they advertise the sealant as self-leveling many customers express their discontent with that factor. While it might have some issues, it works well, has a great consistency, and smooths nicely.

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  • Easy to apply
  • Smooths out easily
  • Works on all roofing materials


  • Not self-leveling
  • Not clear

Recap: Best RV Roof Coating Sealants

Buying Roof Coating Sealants for Your RV: What to Look For

When you’re finally ready to jump into a roof sealant and make a purchase, you want to make sure you’re making the right decision. There are many types of RV roof coating so it’s important to get the one that makes the most sense for you. Here are some of the most important factors to keep in mind before making that final choice.

UV Resistance

Having a UV resistant coating is not an option, it’s a necessity. If you are applying an RV roof sealant it will always protect you against UV rays. When your roof is constantly exposed to the sun it will wear down, crack, chip, and slowly break down over time.

When you choose an RV roof sealant that is UV-resistant, you are protecting yourself and pretty much guaranteeing that you won’t have to worry about further damage down the road.

Water Resistance

Chances are, you’re shopping for an RV roof coating because you’re dealing with water making its way inside your RV. You want to ensure that rainwater does not penetrate the interior of your trailer. The best way to do this is with a water repellent RV coating.

Having a water resistant RV roof sealant serves a few purposes. First, water won’t cause the coating to break down over time. Second, moisture and damp weather will not cause the coating to chip or warp as the days wear on.

Type of Coating

The most critical factor you want to look at is the type of coating you’re using on your roof. You want to know what material works best and you cannot use every type of coating on every roof. You might need an RV rubber roof repair material, but not everyone knows that.

Here’s a quick breakdown of the different materials and their applications:

  • Rubber – Rubber is the most popular material because it is durable and flexible enough to expand in changing weather conditions. This type of coating will work on almost any roof.
  • Acrylic – My personal favorite is acrylic because it’s affordable and it provides a professional appearance. These coatings will typically come in gallon containers and they offer strong UV protection as well. Much of the time the application is a bit more involved because you’ll have to apply multiple coats to your roof and acrylic doesn’t handle water as well either.
  • Silicone – Silicone is the most expensive solution but it provides the most benefits. This material only requires one coat which can reduce the overall cost plus it has maximum reflectivity and resistance to inclimate weather.
  • Fiberglass – This material requires less maintenance than some other RV roof coatings but it does cost a lot and it is not easy to install. In most cases, you won’t only install a fiberglass roof coating if you already have a fiberglass roof on your RV.


The durability of a roof coating most often refers to how long it will last between applications. If you have to keep reapplying every year you’re wasting a lot of time and money. For durability, one of the best solutions is sealant tape because they are incredibly sticky and they last a long time without having to be replaced.

Acrylic also works well because you can cover a large surface area with one coat and it will automatically fill gaps and cracks as you go.

Safe & Non-Toxic

A lot of liquid roof coatings will use shortcuts and toxic ingredients in their sealants that could be dangerous for you during the application process and potentially harmful for your RV long term.

Type of Roof

The type of roof you have on your RV will dictate the sealant that is right for you. The main RV roof types are:

  • Aluminum
  • Fiberglass
  • Rubber

Make sure to check your roof to understand what material it is made out of before getting a roof sealant! Brian’s guide on roofing (linked below) can help you identify which type of roof you have as well.

Still working on the roof? You might be interested in these guides too.

Frequently Asked Questions

How Often Should I Seal My RV Roof?

Sealing your roof is absolutely necessary to keep your RV from leaking, and potentially destroying the interior of your camper. While each and every roof is different, it is recommended that you reseal your roof every year if you use your RV regularly. It is possible to prolong the life of your sealant by keeping your RV covered or stored in a garage when not in use, but the one year rule is your best bet to keep and water out of your RV.

How Much Will it Cost to Reseal My RV Roof?

Resealing your roof is part of the cost of RV ownership. Having your roof professionally sealed will cost over $1000 most of the time and can even run up to $2-3000 depending on the size of your RV. You can save a ton of money by stripping, cleaning and resealing your RV yourself. This doesn’t require hundreds of dollars in specialty tools either.

How Long Does It Take RV Roof Sealant to Dry?

The time it takes sealant to dry is based on the type of sealant your are using. Some sealants are mostly dry in 12 hours, while some can take 48 hours and up to a month to cure 100%. Look at your can or bottle to determine how long it will take your sealant to dry. Also note that this can depend heavily on the weather and temperature when you apply your sealant.

By Mike

Mike leads research, writes, and keeps the site up and running. He's worked on upgrades to an old class A Winnebago, vans, and other homes - wherever they are.