7 Best Roof Sealant Products According To My Experience

Selection Of The Best Roof Sealant Products 

In this article, I offer a list of the best roof sealant products according to my own experience. Therefore, I include only the ones that I have used. The analysis includes roof sealant products suitable for marine purposes and for RV roofs.

I also explained how they behave when applied in what in this discipline we call the substrate, the surface perimeter wherein the coating or the sealant product will be applied.

To begin the article, please note that a roof sealant, like the ones I recommend below, may allow you to prevent future leaks, and that is fine. Nevertheless, you must start by repairing the roof as your first activity. After the repair, It must dry thoroughly, and only at that moment, you may utilize the roof sealant product.

IN CASE OF A STRUCTURAL LEAKING, First, repair the roof. Only when it is repaired, apply a roof SEALANT product. 

The application of a roof sealant does not replace the repair of the rooftop from structural leaking that you have to perform.

This evaluation of the best products is only based on my experience. Therefore, I do not have a list of all the products in the market, but a list of the ones I have used. The manufacturers offer information about the coefficient of elongation and index of ultraviolet reaction. I preferred to see how well it did for me after the first six months, and then after a year and tell you my results below.

These products are particularly manufactured for keeping your roof dry and leak-free. They offer protection from the harmful UV rays, cracks, and leaks that are formed over time.

My criteria for selecting the following best roof sealant products is the following:

  • Each sealant process is different: You may need just an adhesive tape, a sealant liquid, or a more complex coating. I visit all these requirements below in this article.
  • Study the substrate material: Most of the products I recommend below are suitable to be applied in all kinds of surfaces. Check-in my article about specific RV roof sealant products, because there are other products recommended that may also suit the material of the surface of your roofing. Not all are good for rubber, not all of them are suitable for fiberglass, for example.
  • Elasticity: Elongation of the compound after the application is an attribute to be analyzed for the roof sealant products. It depends also on the temperature and the substrate material where it is applied. I can tell you how well it responded to me after six months. I avoided using the coefficients provided by the manufacturers and prefer to describe to you my own experience.
best rv roof sealant

Do not buy anything in rush; check all the features you want in the roof sealant and then order it. Here I suggest you the best ones that I have used (and two that I have not used but have the best reviews) to help you choose the perfect one for you.

1.  Dicor 501LSW-1 (Best Roof Sealant Right Now For Me)

roof sealant

This product is a very good roof sealant suitable to provide good protection to your rooftop.  And precisely your rooftop is subject to exposure to the harsh climatic conditions outside.

With this Dicor roof sealant, it is possible to save money as it was enough for me with only one application repeatedly on fixes, as it seemed for me that one single thorough application sufficed. It is a money saver that helps in keeping up the capacity and state of your rooftop.

When searching for a decent RV roof sealant solution, you ought to discover an item that can help to seal around the vents, climate control systems such as RV AC units and ventilation piping system beside the edges of the rooftop.

The Dicor Roof Sealant is perfect for sheets of rubber, more precisely, for a synthetic compound known as ” ethylene propylene diene monomer” or EPDM.

Therefore, you can utilize it advantageously and securely for your rooftop. It is versatile to the point that it additionally offers ideal attachment to all substrates.  This roof sealant works consummately to mirror the sun’s harming UV beams since it is UV balanced out.

In more than six months, I do not have stains or issues with this solution. Recommended by the manufacturer to be used in RVs. You can use it in almost any substrate that requires a coat or sealing.


  • It can work on all the different kinds of substrate surfaces, including aluminum. It has a self-leveling sealant that creates watertight seals.
  • It remains flexible and does not crack easily.
  • It has ultraviolet protection and stabilization to cut down deterioration.


  • It is self-leveling so it cannot work vertically.
  • It can cause skin and nose irritation according to some users in the comments. However, that did not happen to me when I utilized it.

2.  Geocel 28100 V ProFlex CrystalClear ( Best Roof Sealant Solution For The Readers)

The Geocel 28100 V ProFlex is, first of all, easy to use and voted by our readers. Good for beginners in using coating and sealants. It is a quite adaptable roof sealant concrete that can be utilized in several ways in RVs and marine vessels.

This item is additionally UV balanced out to anticipate staining and disintegration. This product has a good reflection of ultraviolet beams, and likewise, it adjusts with a wide range of climates. It offers the simplicity of use because the application is easy even for a beginner in sealing processes.

In the event that you commit an error in the application on the substrate, you do not need to stress. Without effort, you can clean it up for a wreck-free and immaculate application. You do not have to put much effort to keep it in a clean state.

The ProFlex is additionally ideal for different surfaces, It sticks well on glass and probably also on aluminum, claims the manufacturer, but I did not use it in aluminum.

After applied, it solidifies, and it will not break or finish drying hard. You can pick different tones of colors. After curation, you can also apply the paint. Forgot to mention that it is ultraviolet safe. So as a conclusion, this product will certainly give you a good performance for the money spent.


  • It works on different types of surfaces.
  • It is long-lasting and crack-resistant (after eight months of testing).
  • Easy to use, so quite good for beginners.
  • It is available in different colors.
  • Not cheap, but a good relation between price and performance.


  •  I have not seen any cons of this product.

3.  Eterna Bond RSW450 Roof Sealant Tape

roof sealant

One of the best roof sealant solutions and the best roof sealant of the ones that are adhesive tape.

So this is actually a sealant adhesive tape, not a sealant liquid, as we have been reviewing until now. In a liquid roof sealant, you analyze the elasticity it has once applied in the surface as it contracts or grows without altering its substance. For tapes, we will analyze instead the resistance to extreme weather.

The manufacturer indicates that it can resist very harsh and extreme temperatures, but I did not suffer any condition like that one.

It is also, like in the product reviewed above, easy to utilize, so even first-time users that are unexperienced in sealing and that have never utilized a roof sealant will not suffer considerable difficulties in applying it on a wide scope of surfaces.

I can also recommend the item due to its high UV opposition. It will not break for quite a while. What is more, when restored, paint can be applied over it. You can reapply it above itself with no problems in a second layer. The product will not give a muddled black-top look that would some way or another ruin the appearance of your RV rooftop devices.

You can utilize it to seal around venting frameworks, tighten heads and climate control systems.


  • It can be used for a wide range of applications.
  • It is quite durable and gives a long-lasting performance. What I applied in the past, is still there after more than a year.
  • Easy to use, also recommended for beginners, as most of the products on this list.


  •  It was an expensive product, justified as it is the best roof sealant coming in adhesive tape. But in this latest update of this article, I cannot say anymore that it is expensive.

4.  ToughGrade Self-Leveling Rubber Roof Sealant

This self-leveling roof sealant product is one of the most recommended items on different websites that are currently available. It works well in fixing rooftops, forced air systems and venting frameworks, and different things requiring elastic rooftop fixing.

Marketed for RVs, it is not only for roofs and not only for RVs. Used in marine applications, such as pontoon boats.

You can utilize it on excited metal, vinyl, wood, mortar, aluminum, and cement. You additionally do not need to worry about staining or recoloring of the substrate material to which it is applied.


  • It possesses stabilization components that prevent decoloration and deterioration. It can be used on a horizontal surface.
  • It offers long-lasting performance at a standard price.


  • It is only available in white color.
  • It can cause skin and nose irritation, but that did not happen to me when using it.

5.  Sashco Through The Roof Sealant

Also one of the best roof sealant products, the manufacturer promotes it as the product that can resist extreme temperatures. This attribute, I did not have the chance to test. I am currently using this product in the update of this article, so I would like to see how it behaves after several months.

As you can notice in several “best roof sealant reviews”, this Sashco Through rooftop sealant is a powerful concrete that works in all temperatures and sorts of climate. That is one thing acknowledged about this product that makes it one of the tops in this rundown.

In case you are hoping to ensure your rooftop and make it ultra-watertight, you should consider this top-performing item that does it well.  You do not need to reapply it every now and again and devour time doing as such. This roof sealant is sufficiently flexible for a wide scope of utilization and different substrates, including on cement, metal, and plastic.

You can depend on it for various utilizations and applications. It can be applied alone and does not require to be combined with other components, so you do not need to spend on various items for each undertaking.

This rooftop bond can hold fast well to a wide scope of substrates, including stone, solid, tiles, block, plastic, polyurethane, stucco, mortar, wood and some more. However, I used it only on wood and polyurethane.


  • It permanently stops leakage.
  • It can seal around all types of roofs.
  • It is crack-resistant and it will not dry hard.


  • It can annoy some people because it has a chemical smell.

6.  Dicor BT-1834-1 Butyl Seal Tape

Well, actually, this is another roof sealant tape. Let me introduce it in this list as it can also complement other sealing and coating products, as I explain now below. The Butyl Seal Tape is a compelling fixing material for RV and marine rooftops.

This Dicor seal tape can be applied around vents, venting frameworks, climate control systems and other surface materials that may need waterproofing. It can make a seal along the edges of the rooftop and around ventilation pipes and air vents.

In the case that you committed an error during the application of this tape, you do not need to worry since it is anything but difficult to remove it and align it again for that perfect appearance.

The Dicor Butyl Tape is one of the one of a kind items in the classification we found. It can be applied easily as all the products in this list.


  • Installation is fast and easy. It comes as a continuous rolling tape. Not an advantage for some boat owners and RVers who are looking for a liquid roof sealant.
  • It also works well along with unusual patterns.


  • It can be more expensive than other sealants. However, in this last update, I found it at similar prices.
  • It is a tape. It helps you to complement your rooftop sealing undertaking. Most readers are looking for a liquid roof sealant.

Criteria Followed For The Review

I understand how difficult it is to choose a sealing, not only for RVs, but also for pontoons, or other boats. There are more than twenty-five products available and I wanted to come with a shortlist of less than ten best roof sealant products.

So here are the criteria that I followed in order to suggest the products of this list.

The user requirement behind:

One of the main interesting points, when looking for a rooftop caulking or fixing item, is the purpose you have behind.

Are your requirements related to roof coating, or do you require more a sealant, actually? Would it be a sealant tape enough? If you just need to fix a little hole, purchasing a cylinder sealant may very well be what you need. Then again, you may require several products if you have to cover larger requirements and require a full re-coating.

Therefore, I have included two sealant tapes. They are part of this encompassing activity of coating and sealing. If you require just a sealant for an RV, we cover RV sealants in this article.

Substrate material:

Know the roofing material where the roof sealant product will be applied. The most well-known roofing material is rubber. It is the substrate that most recreational vehicles have on the grounds that it is shoddy and lightweight.

You should pick one of the RV roof coating products that fit better with your substrate material, which can be rubber but could be also fiberglass or aluminum.

Another sort is Ethylene Propylene Diene Monomer (EPDM), a synthetic material, which requires no additional ultraviolet protection; in any case, it needs recoating occasionally. Then again is the Thermal PolyOlefin (TPO) roofing material, which is sturdier than EPDM just as shinier than other RV roof coating materials.

Tear resistance and elasticity:

Likewise, I have considered the flexibility and elongation abilities of the products when including them in this list. This is the capacity of the liquid roof sealant product to curve, extend or contracting without losing any of the protection furnished to the roof.

The manufacturers offer information about the coefficient of elongation. I preferred to see how well it did for me after the first six months, and then after a year, and in both measurements, I tell you my results.

The attribute of elongation and elasticity is valid mostly for liquid roof sealant products. Fluid sealants may require a bit adaptability for the changes. For tape sealants, we do not use the elongation factor, but it is important that the tape is resistant, hard to break and can resist the effects of water.

Ultraviolet resistant:

Ultraviolet beams are non-noticeable radiation from the sun that causes compound responses in numerous substances, substances that in coating and sealing we call the substrate material.

There are two arrangements here that you should perform here for the best experience.

  • The first is to purchase one of the best roof sealant products in this list with ultraviolet protection that will increment the life expectancy of the application of the product in the rooftop.
  • The second arrangement you can do obviously is to shield your RV or boat from unforgiving weather conditions when not being used by parking it in a garage or a dedicated storage location.

Ease of application:

You should not purchase a roof sealant that requires much effort and a long time for application on the substrate material.

Furthermore, you need to stay away from products that require an activator or a preliminary application of another product.  I have only selected products that can be applied easily and do not require to buy two products.


There are many different manufacturers in the market who claim that their product is the best, but you cannot easily trust them. It is quite difficult to shop from a wide range of products in the market because there are so many products available with different features.

You have tapes and liquid roof sealant products on this list. You can apply them yourself or call a specialist, that I think you do not need at all.

Roof sealant products provide long-lasting protection and also you get fewer worries for many years. Are you looking around for roof sealant and coating products? You need a special type of sealing product if you want the leakage to get stopped. It is possible sometimes that your RV or boat develop leaks, you need to seal such leaks in order to keep the water and weather elements out, which means you need to choose the best roof sealant products available in the market. I used myself six of the products in this article.

Please let me know in the comments, which was your experience using these products.  Write us in the comments section about them.

Anthony Foxx

I am Tony, an RV designer and RV developer. I create bill of materials for RV manufacturers for travel trailers and fifth wheels. I worked as a freelance transportation consultant for Lyft. As an RV development consultant, I create customization trees for RV manufacturers who want to offer a solution to prospective customers to design their custom RV with variant configuration. Apart from this, I sell in Indiana trailer hitches, hitch balls, goosenecks and weight distribution systems where I provide advice to customers who want to know which is their towing capacity, which hitch ball should they utilize and how to deploy a weight distribution system. I do my best to explain all these processes and their installation, here in RV Favorites.