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Spotting the Best RV Roof Sealant 2019


A roof sealant designed for recreational vehicles refers to a strong sealant, often made of rubber material, which is a huge help in preventing water from getting deep into the roofing material. It prevents the roof of your RV from breaking down, especially if it is constantly exposed to extreme weather conditions.

It is important to note, though, that while all products in the roof sealant category have similar functions, they also differ in terms of thickness and composition. For you to gain more than enough assistance in picking the ideal choice for your preferred application, this guide with short reviews of the 7 best RV roof sealants in the market today is created.

Comparison of RV Roof Sealants




Our Rating

Dicor 501LSW - Editor's Choice



EternaBond RSW - Best of the Best



ToughGrade - Hot New Product



Eternabond -  Best Bang for the Buck









Best RV Roof Sealants 2019

1. Dicor 501LSW-1 Lap Sealant - Editor's Choice

One of the most promising RV roof sealants I discovered based on their features, benefits, and functionality is the Dicor RV roof sealant that’s why I will always recommend it to those looking for a good roof sealant for their recreational vehicles. What I like about this option is that it suits EPDM sheets very well.

It also offers an impressive adhesion to various materials, including wood, aluminum, concrete, galvanized metal, vinyl, and mortar. Another favorable benefit I noticed in this roof sealant is its ability to produce a watertight seal around the edges of the roof, its air vents, screw heads, air conditioners, and vent pipes.

Such offers more than enough protection for the mentioned parts. It is also guaranteed to be flexible while offering excellent sealing ability. It can resist UV rays, so rest assured that it can prevent discoloration and deterioration triggered by it. There is no risk of it staining or discoloring the material you applied it to.

It has just the right amount of texture. It is thick enough while also being capable of flattening slightly after the application. It works well for surfaces that require stretching, such as an RV roof.

One problem, though, is that it is quite stiffer when it initially comes out in comparison to other self-leveling tube sealants.

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    Suits EPDM sheets well
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    Offers impressive adhesion to various materials
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    Creates a watertight seal around the different components of your RV and its roof

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    Flexible while boasting of its impressive sealing ability

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    Can resist UV rays and not prone to stains, discoloration, and deterioration

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    Stiffer when compared to other roof sealants in the market today

With the ability of Dicor 501LSW-1 Lap Sealant to create a watertight seal, one guaranteed to stick really well on the edges of the roof and its other major components, it is safe to say that it’s really worth investing your money into.

2. EternaBond RSW-2-50 RoofSeal Sealant Tape - Best of the Best

I also noticed that EternaBond RSW-2-50 RoofSeal Sealant Tape is an excellent option for those who are searching for a high-quality RV roof sealant. It is perfect for use on any tears found not only in the roof or seams but also flashings, copings, gutters, skylights, and others.

The reason I find this sealant so impressive is that it is effective in repairing and restoring the roof of your recreational vehicle and home. It is versatile and multifunctional in the sense that it works on various roofing materials, including TPO, EPDM, metal, tiles, aluminum, wood, and galvanized steel.

It is also perfect to use in a sunny environment. One more thing I find so favorable in this sealant is the ease in applying and installing it. You can install it by just simply preparing the surface prior to using it. It has a high elongation factor, too, which means that it contracts or expands based on the changing conditions.

Another nice feature is the adhesive side, which also comes with a silicone lining. This lining helps prevent the sealant from sticking to other surfaces prior to applying it.

However, as this sealant really sticks well, you might have a challenging time using it if you don’t strictly follow the instructions, especially in terms of making it follow curves. Many also find this sealant pricey.

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    Ideal for use on tears found on roofs or seams
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    Repairs and restores RV roof
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    Versatile as it is suitable for various roofing materials and applications

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    High elongation factor, letting it contract or expand based on changing conditions

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    Silicone lining prevents it from sticking to other surfaces before the application

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    Difficulties in using it if you don’t strictly stick to the instructions as the sealant really sticks well

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Despite its price, many still say that it’s worth it as it is effective in fulfilling its intended function.

3. ToughGrade Self-Leveling RV Lap Sealant - Hot New Product

I can also recommend the ToughGrade Self-Leveling RV Lap Sealant to anyone who wants to perfectly seal the roof of their recreational vehicles. What’s so impressive about this sealant is its effectiveness in sealing along the roof edges, as well as other components like around the vent covers, screw heads, air conditioners, and vent pipes.

Another advantage I noticed in this RV lap sealant from ToughGrade is that it is UV-stabilized, which means that it can prevent the risk of discoloration and deterioration. The good thing about this lap sealant is that it is compatible with all types of materials used for roofing.

In addition, it also provides a good adhesion to different kinds of materials, like concrete, galvanized metal, vinyl, wood, mortar, and aluminum. It can match any color so there is also no risk of stains or discolorations, especially during application. It is capable of sealing the roof while also promoting its high level of flexibility.

It is a self-leveling option, making it possible for it to provide a nice seal. While it does not have structural strength, such as the one for silicon and other materials, rest assured that it won’t crack when exposed to heat or when dry.

Take note, though, that this sealant has strong fumes, causing an unpleasant smell, so it is important to look for a well-ventilated space where you can do the application.

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    Seals along the edges of the roof and its other components
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    UV-stabilized, preventing the risk of discoloration and deterioration
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    Compatible with all types of roofing materials

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    Good adhesion to various materials

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    Seals roof without losing its flexibility

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    Strong fumes causing an unpleasant smell when applied

ToughGrade Self-Leveling RV Lap Sealant is definitely a good sealant for use in any recreational vehicles so it is always included among the options for many RV owners.

4. White Eternabond Mobile Home and RV Rubber Roof Sealant - Best Bang for the Buck

What I like about the White Eternabond Mobile Home and RV Rubber Roof Sealant is that it seems to be the only sealant available in tape form that works efficiently in stopping almost all types of leak. In addition, I am impressed with its ability to provide a waterproofing feature to all surfaces within just a few minutes.

It has the ability to seal any tear, rip, or open seam on all surfaces. It also works well in repairing leaks. That said, it is no longer surprising why many professional roof repair specialists prefer to use it when doing their job. It works on various roofing materials, like TPO, EPDM, PVC, metal, copper, concrete, tile, and wood.

It is even ideal for use on pond and landfill liners. One more thing I noticed about the best rv rubber roof sealant is that it features a specialized and unique backing, which is known for being UV stable. It even has a primer, allowing it to stick well on the surface where you install it.

It is a great choice, especially if you want to re-seam roof. It can perform such function no matter what the roofing material is. There is also a guarantee that it can provide a water-tight seal permanently.

It does not stick that well to silicone, though, so it is advisable to clean up carefully and remove any old silicone caulk on joints or seams previously repaired with it before the application. It has an extremely strong sticking power, too. Once it touches the surface, you can no longer take it back, so be careful when positioning it.

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    Ideal for almost all types of leak
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    Offers a waterproofing feature to all surfaces
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    Can seal tears, rip, or open seams

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    Sports a specialized and unique backing, which is known for being UV-stable

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    Offers a permanent water-tight seal

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    Does not stick that well to silicone

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    Prevents you from taking it back once it sticks to something so you need to be really careful not to commit mistakes when positioning and putting it on

With the effectiveness of this roof sealant to provide a permanent and water-tight seal, it is definitely worth checking out if you’re after a high-quality product.

5. Geocel 28100V Pro Flex Crystal Clear RV Flexible Sealant

Geocel 28100V Pro Flex Crystal Clear RV Flexible Sealant is also a great addition to this list of the best RV roof sealants. One reason is that it is specifically designed to be used for recreational vehicles, so expect the roof of your RV to be in top-notch condition with its help.

I like the ability of this RV flexible sealant to withstand changes in temperature as well as joint movements caused by traveling using your RV. It is also long-lasting. In fact, it has been said to have a 25-year life expectancy.

What I love about this RV roof sealant is that is that it stays on its top-notch condition even if you expose it to adverse weather conditions after applying it. I find it impressive, too, because of its excellent contraction and expansion properties designed to handle various elements and weather conditions.

It sticks well to all materials used in recreational vehicles, too. Expect it to work well even when used on frozen, slightly oily, and damp surfaces. It is versatile in the sense that it is suitable for different RV makes and models. Just contact your chosen seller so you can gather information regarding fitment compatibility.

However, take note that it is a bit tricky and challenging to use because of its strong sticking power. Furthermore, the sealant spends more days to cure than usual.

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    Specifically designed for recreational vehicles
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    Flexible sealant
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    Can withstand temperature changes and joint movements

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    Long-lasting – Expect it to stay in top-notch condition for up to 25 years
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    Excellent contraction and expansion properties

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    Works well on various RV makes and models

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    Quite tricky to use

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    Requires more time to cure than usual

With the suitability of the best rv roof caulk to all kinds of recreational vehicles – regardless of the make and model, it is definitely one of the best products in the industry.

6. COFAIR PRODUCTS UBW425 4x25 WHT Ultra Bond

I have to say that COFAIR PRODUCTS UBW425 4x25 WHT Ultra Bond is also one of the best-selling products in the RV roof sealant industry. It is a multi-tool product, which is known for its excellent durability. It only weighs around 1.4 lbs.

It even comes with a 15-year warranty, which serves as proof that it works in stopping leaks within that long period. What I find so impressive in this option for RV roof sealant is that it works impressively in covering seams. It has a strong sticking power, too, which lets it stick well to various surfaces.

It is possible for you to put a liquid sealer at the top of the whole roof, as well. Another thing I like is its quick sticking ability. Expect it to stick fast while also being easy to apply wherever needed. I also noticed that it is capable of holding up well even if used heavily for a long period.

It is also useful in fixing leaks in your RV’s roof. Being capable of sealing tightly, expect it to be perfect for use on light and moderate duty work.

Be extra careful when applying it, though, as there is no room for mistake due to its extremely sticky nature. Once you apply it incorrectly, you can no longer correct it because it won’t come up.

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    Multi-tool product
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    Known for its excellent durability
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    Long-lasting – Expect it to serve its purpose for up to 15 years

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    Covers seams and repairs leaks

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    Holds up well even with heavy use

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    Strong sticking nature makes it impossible for you to correct it in case you applied the sealant incorrectly

To address this issue, make it a point to cut it in manageable lengths at first, especially if you’re working alone or if it’s too windy.

7. Heng's 95502 White NuFlex #311 Sealant

Another sealant that, I think, is worthy to check out is the Heng’s 95502 White Nuflex #311 Sealant. I like this option as even after the application, I still noticed that it is capable of permanently retaining its flexibility.

It is easy to apply and use, too. It is specially formulated and neutrally cured, making it capable of sealing joints in case you install RV air conditioners, roof vents, satellite antennas, skylights, or any other item you may want to put into your RV or trailer roofs.

Another thing I find impressive in this sealant is its ability to easily adhere to almost all kinds of popular substrates. Such is possible without requiring you to use any primer. I am also impressed with its excellent sealing power and quick setting time.

However, some noticed that its price is a bit higher than those sealants with almost the same quality as this one.

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    Stays flexible permanently after application
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    Easy to apply and use
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    Seals joints due to its special formulation and natural cure

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    Adheres to almost all popular substrates
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    Excellent sealing power

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    Quick setting time

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    A bit pricey compared to the others

Overall, Heng's 95502 White NuFlex #311 Sealant is worthwhile to check out as most of the things it can offer can further improve the condition of your recreational vehicle.

RV Roof Sealant Buyer's Guide

One of the major problems linked with RV roofs is the fact that you may be unable to spot issues right away if you do not regularly inspect it. It might cause you to spend more on repairing damages caused by water and other elements. Water and other elements might damage your vehicle, lessening its value.

With that, you need the best RV roof sealer reviews specifically designed for the material of your vehicle. Ensure that you take extreme caution when choosing a good RV sealant. Finding a good one is possible if you formulate a decision based on the following:

Spotting the Best RV Roof Sealant 2018

Roof Material

What you have to do when searching for the appropriate roof sealant for your RV is to take into consideration the main material used in making it. Note that the roof of recreational vehicles is constructed from various materials.

That said, check the suitability of the sealant first and ensure that it works in permanently sealing your roof. Roofs used in RV are those that are either constructed from TPO or EPDM rubber materials.

EPDM is known for its durability because there is a guarantee that it will serve you for several years without extensive maintenance. If the roof is made of this material, then make sure to look for a sealant that is suitable for it in case there are cracks.

TPO roofs in RV, on the other hand, are more rigid and shiny when compared to other materials. It makes use of less plastic while not being rubberized. Unlike EPDM, it won’t oxidize and come with a chalk-like surface. Choose a material, which perfectly suits the features of TPO material, too, to keep it in good condition for a long time.

Are there leaks?

Before formulating a buying decision, determine if the roof has some leaks. If that’s the case, then make sure that you determine the main cause of the leak. It might be caused by the summer rain or the age of your vehicle. After identifying the leak and its major cause, you can also easily spot the suitable roof sealant for it.

The reason for application

Ask yourself why you want to apply the sealant. Your actual reason plays a major role in making the right decision. For instance, if you want to apply it to keep your vehicle cool, then your best option is a sealant, which has a brilliant white finish.

Such finish is recommended in such case as it reflects light, thereby maintaining the coolness of the interiors. Another reason for the application of the best camper roof sealant is to reduce the risk of water leaks. Make your decision based on the intended purpose of the sealant as it guarantees a more satisfying purchase.

Elasticity or Elongation

This factor means that the material is capable of stretching and recovering. This specific ability to recover and stretch translates to the effectiveness of the sealant to move when the roof contracts and expands when there are changes in temperature – that’s possible without the risk of cracks.

With that in mind, ensure that you look for the best rv roof seam sealant with better elasticity as it also means that it can endure such major changes.

Tear Resistance

The sealant’s tear resistance is its ability to resist tearing often caused by foot traffic, roof movements, and shifts or changes in the environment. Ensure that your chosen sealant can resist such tearing to maintain its good condition for a long time.


This factor works in measuring the specific amount of light and heat reflected away from your RV’s roof with the aid of the sealant. Choose a cool and reflective sealant as it also creates a roofing surface, which guarantees the efficient functioning of its components.

In addition, it also reduces the need for maintenance. There is also no need to worry about the roof failing prematurely as the sealant protects it from thermal shock and UV damage.

Final Words

The process of choosing the best RV roof sealant can actually be simplified by taking into consideration the factors mentioned in the buying guide. While it is true that you have numerous options, finding the ultimate choice for your RV’s roof is possible with careful research.

Ensure that your chosen sealant is flexible, too, so it can handle various conditions. Furthermore, the best one is capable of compensating the stresses linked to temperature, seasonal contraction and expansion, the weight of ice and snow, and settling of the foundation.

Learn more about how to choose the best RV roof coatings and best caulks for RV exterior 2019 with buyer's guide and in-depth reviews. By the way, have a look at our best RV wash and wax and best RV wax to keep your RV clean!

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