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Top 5 Best RV Roof Sealants Recommended In 2021 Reviews

RVs help you feel at home even when you are on vacation. Hence, you should also take care of them as if they are your home. You should consider them a long-term investment and take care of them.

Exposure to sun, water and other weather elements can cause splits and cracks in the roof membrane of your RV over time. Moreover, these are very costly to repair.

However, don’t worry. There are many great RV roof sealants available that will prevent any damage.

The best part? You’re about to learn all about them in the following review.

RV Roof Sealant

Best RV Roof Sealants Comparison Table

ProductsUV StabilizedSuitable for all SurfacesRating
UV Stabilized
No
Suitable for all Surfaces
No
5 out of 5 stars (5 / 5)
UV Stabilized
Yes
Suitable for all Surfaces
Yes
4.5 out of 5 stars (4.5 / 5)
UV Stabilized
No
Suitable for all Surfaces
Yes
4.6 out of 5 stars (4.6 / 5)
UV Stabilized
No
Suitable for all Surfaces
Yes
4.7 out of 5 stars (4.7 / 5)
UV Stabilized
Yes
Suitable for all Surfaces
No
4.9 out of 5 stars (4.9 / 5)

Top 5 Best RV Roof Sealants On The Market In 2021 Reviews

1 Dicor 501 LSW-1 Self-Leveling Lap Sealant

Dicor 501 LSW-1 Self-Leveling Lap Sealant
Our rating:5 out of 5 stars (5 / 5)

Pros

  • Works well with EPDM sheeting.
  • Protects your RV from roof leaks.
  • Doesn’t crack and is flexible.
  • It can also be used to seal vents.
  • Easy to apply.

Cons

  • Doesn’t work on fiberglass.

By using the Dicor 501LSW, you will never have to worry about leaks in your RV again, because this product can totally seal your roof.

The Dicor 501LSW can also protect your RV from the bad weather. As you may know, your roof is the first one exposed to the harshest of outside elements, including wind, snow, and rain. It will also be exposed to thawing and freezing. And such elements can lead to cracks if you don’t put a roof sealant on the roof.

With this product, you will be protecting your roof against all such outside elements, which means you will not have to worry about spending anything on repairs.

Furthermore, when looking for a good roof sealant, you should also find a product that can help in sealing around the vents, air conditioners, and vent pipes aside from the roof’s edges. This product does all these plus sealing screw heads, keeping them watertight.

The Dicor 501LSW is also ideal for EPDM sheeting, so you can use it conveniently and safely for your RV roof. It is so versatile that it also offers perfect adhesion to mortar, aluminum, vinyl, concrete, galvanized metal, and wood. With plenty of uses, you can be sure that you’re getting the most out of your spending.

2 ToughGrade Self-Leveling RV Lap Sealant

ToughGrade Self-Leveling RV Lap Sealant
Our rating:4.5 out of 5 stars (4.5 / 5)

Pros

  • Highly affordable.
  • UV stabilized.
  • Works effectively on all kinds of surfaces.
  • Easy to apply.

Cons

  • Only available in one color – white.

This is another nice option that you can get. It is liked by many as it can deliver good performance for the price. Since it also comes from a top brand, it is further assurance that you will end up with a good product that you have always wanted. It will protect your RV’s roof well.

A great thing about this roof sealant is that it will work effectively on all kinds of surfaces like wood, glass, aluminum, etc. Furthermore, the product can seal along the roof edges too. You will also find it great for sealing around vent covers, vent pipes, screw heads, and air conditioners.

Another good thing about the product is that it is UV stabilized. This is a great quality, as it means that this sealant will be able to prevent cases of deterioration and discoloration on the roof. There is no doubt you will find it to be one of the best available options on the market right now.

3 Geocel 28127V Pro Flex Bright White RV Flexible Sealant

Geocel 28127V Pro Flex Bright White RV Flexible Sealant
Our rating:4.6 out of 5 stars (4.6 / 5)

Pros

  • Gives a very smooth finish.
  • Highly resistant to cracks.
  • It seals all holes and leaks very effectively.
  • Provides excellent adhesion to all kinds of surfaces.

Cons

  • Not highly durable.

You know how serious water damage can be if you own a motorhome. Preventing water from getting into the smallest sections of your vehicle is crucial because this can later lead to serious problems. As with the Geocel RV Flexible Sealant, a high-quality RV caulk, you can prevent water from getting in and mold and mildew from forming. It provides excellent versatility and is resistant to cracking.

The sealant seals any holes or leaks tightly and can attach effectively to various types of materials. It provides excellent adhesion to different objects, including those that are moist, frozen, and sticky. And it will not crack or peel even when the temperature changes. With various textures, the bright white color fits well.

This sealant, however, has a thick consistency, and, when you apply it, it can make a mess. And it can change color over time and become off-white.

4 Dicor – 551LSW-12 White Non-Sag Roof Lap Sealant

Dicor – 551LSW-12 White Non-Sag Roof Lap Sealant
Our rating:4.7 out of 5 stars (4.7 / 5)

Pros

  • Perfect for spot sealing.
  • The formula doesn’t sag.
  • High-quality product.
  • Very easy to use.
  • Suitable for all surfaces.

Cons

  • Needs to be leveled manually.
  • Not suitable for vertical surfaces.

The Dicor sealant works extremely well along the edges, vents, and screw heads of your RV roof to create a stable seal. It’s a perfect match for a wide variety of different RVs designed to conform to several different surfaces, including wood, vinyl, aluminum, galvanized metal, fiberglass, and more.

It’s also compatible with the sheeting of EPDM and TPO, and the white color of the sealant makes it fit well with most RV roofs. As a self-leveling sealant, the formulation is too runny to be used vertically, but it is suitable for use on horizontal surfaces.

Remember to use a greater quantity to cover screw heads while using this product so that the product can stretch and even out. If you have a leak and you want to stop it by sealing all possible nooks and crannies, this is the perfect item for you.

The size of the tube that it comes in is one big drawback. It could take up to 5 or more tubes to finish the job if you have a big RV and want to seal the entire roof. But water damage, on the other hand, would be more costly to repair than properly sealing it up.

5 Heng’s 95502 White NuFlex #311 Sealant

Heng’s 95502 White NuFlex #311 Sealant
Our rating:4.9 out of 5 stars (4.9 / 5)

Pros

  • Adheres very easily.
  • Highly flexible after the application.
  • Easy to prepare.
  • No need for a primer.
  • Environment-friendly.
  • UV resistant formulation.

Cons

  • A little expensive.
  • Re-coating is required every few years.

The roof coating of Heng 95502 is one of the best out there, making it a favorite of both mobile home and RV owners. It is suitable for sealing of tears and cracks, and for waterproofing air conditioners and vents, and is also designed for use over RV rubber roofs.

The UV-resistant formulation allows it to withstand the heat of the summer. The coating will expand and contract with the roof of your RV to prevent cracking, and deterioration once applied. It’s also non-polluting and non-toxic, so by using the product, you protect your health and the environment.

This is a perfect alternative for replacing Motor Coach rubber roofs because of the clear white colors. Overall, needing fewer coats than competitors, the product is very easy to work with. The formulation is also safe to use under sunlight and, even when freshly applied, will not bubble or crack.

The fact that it’s an acrylic formulation implies that it’s not going to be as long-lasting as a silicone one. However, it’s still a decent product that does the job exceptionally well but bear in mind that you’ll have to recoat your RV’s roof again a few years down the road.

Best RV Roof Sealants Buying Guide

Before buying yourself the best RV roof sealant, you should consider the following factors. These will define the performance of the product that you use and hence they should not be overlooked.

  • Formulation

In terms of how it works, the material from which the coating or sealant is produced makes a major difference. The composition itself matters less than the overall consistency of the substance when it comes to pasting sealant and tape sealant, but RV roof coatings are made from significantly different materials. Silicone is the strongest in terms of weather resistance, but acrylic and urethane serve their purposes, too.

  • Ease of Application

In terms of how they are applied, how long they take to dry, and how many coats they need to work most effectively, formulations vary quite a bit. One of the simplest materials to deal with is silicone. It dries easily, takes only one coat, and is simple to apply. Acrylic and urethane products differ, but to achieve maximum potential, they all need at least a primer coat and several coats of the substance.

best rv roof sealants

  • UV Stabilization

UV rays are non-visible radiation from the sun that induces chemical reactions in many compounds. It allows your RV rooftop to wear out over time.

To extend your RV’s lifetime, it is important to get a roof sealant with UV-resistance. This is definitely a great quality in any roof sealant you purchase.

  • Elasticity & Tear Resistance

The ability of a sealant to twist or transform without losing its sealing properties is elasticity. Meanwhile, tear-resistance refers to its raw power and how much power it can resist before breaking up.

This applies to liquid sealants as well as to tapes. You want a material that is durable and hard to break for tapes, while liquid sealants need some versatility to accommodate modifications.

When making your choice of the best RV roof sealant, you will have to keep this in mind because you need to use the right materials in the right places. For joints that expand and contract, a very rubbery sealant is best, whereas a stronger or rigid sealant is better for places that must hold some weight.

  • Price

In most situations, buying an RV roof sealant would not be a burden on your bank account. But you do need to build a budget cap to guarantee that you don’t end up feeling disappointed with your purchase.

To ensure you get an RV roof sealant that meets all your needs, you should consider what features are important and what price point you can live with. Do you find a product with UV ray resistance to be useful, for example? If so, then you’ll have to pay a little extra.

  • Warranty

Some RV roof sealants come with a warranty while others don’t. It’s something you might want to think about before buying because it’s always pleasant to have a little insurance against a defective product.

What Are The Different Types of RV Roof Sealants?

There are three main types of RV roof sealants. They differ on the basis of quality, robustness, and price. You can look through them and decide which type of sealant will suit your needs the most.

  • Acrylic Coating

Acrylic coatings are among the cheaper choices out there as a suitable solution. They’re very good for your roof and structure to escape all kinds of weather damage. Despite the great protection, they manage to reflect a good amount of sunlight. They also run very well to cover up any cracks in your roof and effectively keep water out. Acrylic does not last as long as other options for coating, which means you will have to reapply the roof sealant every few years.

best rv roof sealant

  • Silicone Coating

Silicone, the most expensive option out there, is also the most durable. It will work exceptionally well against weather deterioration, damage from the wind and heat, as well as water ponding. Its composition allows it to remain very elastic over long periods of time, leaving it intact.

The downside of silicone is that it gets dirty quite quickly, but any problems associated with dirt should be taken care of by washing your RV regularly.

  • Urethane Coating

One of the more robust options for coating your RV’s roof is urethane. It is a common choice among RV enthusiasts and mobile homeowners. Its structure works well to defend against falling branches and other small debris, as well as generally shielding the roof from different elements. The higher application costs and the overall time commitment are some factors to bear in mind when you first do it, as urethane requires at least two coats to operate effectively.

How To Apply RV Roof Sealants?

To get the most value from your RV roof sealant, you need to make sure that you apply it properly. To do that, here’s what you must do:

  • Firstly, you need to prepare the surface for application.
  • Remove all loose caulking or sealants you might have previously applied. Caulking or sealants that are in good condition and adhering well can remain in place.
  • Pressure wash or scrub with a deck brush the entire roof surface using warm water and powdered laundry detergent. Do not use liquid dish detergent, solvents, or RV roof cleaners.
  • Flush clean with fresh water.
  • Allow drying completely.
  • Remove vent covers.
  • If you are concerned about getting the coating on the side of the vehicle, we suggest attaching a plastic vapor barrier as an apron around the edge of the roof using masking tape.
  • Now we move towards applying the roof sealant on your RV.
  • Make sure to place your RV in a well-ventilated area. Do not carry on with this task indoors unless you are in a paint booth with approved ventilation.
  • Extinguish all sources of ignition. Uncured product is a flammable liquid.
  • Keep the product at room temperature for ease of application and stir it for a few minutes.
  • Using a brush, apply a heavy coat of the sealant around all objects protruding through the roof. Force the coating into all the seams around the vents and air conditioners, as well as all perimeter seams.
  • Allow curing until dry to the touch.
  • Apply one or two heavy coats over the entire roof by pouring and spreading the sealant with a long nap roller.
  • Do not press too hard.
  • Allow the coating to flow out on its own and self-level.
  • Do not keep rolling as the sealant will become too thin.

Now that you have applied the sealant, just let it sit and remember, it is not paint. You must allow it to dry for at least 24 hours before you take the vehicle on the road.

How Much Does Roof Sealant Cost?

Roof sealants come in a wide price range. You can choose among them depending on your affordability.

  • Under $15

At this price point, you’ll find basic roof sealants. The consistency of formulations will vary quite a bit, and the sealant will not be highly durable. However, you can expect the sealant to last you a few years and protect your RV from external weather elements.

  • $15-$40

In several different formulations, the mid-range is home to a wide variety of products, from sealants to coatings. Typically, the consistency is good to really good, but still, you will need to vet the products and find yourself the best option.

  • Over $40

At this price point, you will find full roof coating kits as well as a couple of pricier formulation-only options. There’s a bit of a higher price for premium quality, but you’ll get what you paid for. Silicones that are robust appear to be in this price range. The product that you get will be highly durable and completely worth it.

How To Remove RV Roof Sealants?

RV roof sealants need to be replaced after a fixed number of years, depending on the quality of sealant you used in the first place.

To ensure that your RV doesn’t get damaged, you must remove the old roof sealant properly. You can follow the steps given below to get the job done.

1 The process is simple. All you need to do is scrape the sealant off.

2 Take a knife and start scraping the sealant.

3 If you face any difficulty, then use a hairdryer side by side to easily remove the sealant.

In this method, you don’t have to use a chemical remover, but then, it might not apply across all roof sealants. But while it may seem easy, it must be done properly.

You shouldn’t disturb the RV roof in order to prevent a larger problem, such as damaging the other portions of the roof. In addition, some owners also use a hairdryer to remove a rubber roof sealant, which is quite practical and easy if you’re dealing with cold weather.

On the other hand, you can also refer to the product manual that comes with the sealant that you purchased. The manufacturer has specific instructions on how to remove the sealant, which varies from its type.

Some of them recommend using a putty knife that can remove the roof sealant. Others suggest using a heat gun to take it out. You can consider any of these simple methods to get rid of the set and dried sealant, especially if you need to reapply the sealant or you have made a mistake.

Conclusion

RV roof sealants are a necessity if you want to maintain your RV properly. They will ensure that your RV is safe from all weather damage. You can choose the best RV roof sealant for your RV from the list above and refer to the buying guide to help you understand why it’s the best.

According to our research, we believe that Dicor 501 LSW-1 Self-Leveling Lap Sealant is the best RV roof sealant.

It will protect your RV’s roof and will prevent all kinds of leaks from it. Moreover, it works well with EPDM sheeting and doesn’t crack. It is highly flexible, and lastly, it is easy to apply.

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