Best RV Roof Sealants – 2020 Reviews & Buying Guide

Your RV represents a pretty significant investment. Making your investment last over the long-term requires periodic maintenance. One of the most important areas of attention is the roof of your RV, which left unattended can lead to a lot of damage. To prevent damage from weathering, it is necessary to apply RV roof sealants periodically. This review and buying guide will compare some of the best RV roof sealants and provide some additional tips for choosing a quality product when you shop.


Top Rated Best RV Roof Sealants Reviews

Flex Seal Liquid Rubber in a Can

A top product that has great potential as a sealant for a wide variety of RV roof types is Flex Seal Liquid Rubber in a Can. It is easy to apply and provides the long-lasting protection your RV’s roof requires.

This is a non-toxic liquid rubber sealant made to flow easily into cracks and holes to create a watertight seal. It dries quickly, remains flexible and pliable, and provides protection that won’t breakdown under weathering conditions.


• Pour, brush or roll on application.
• Non-toxic.
• Fills in holes.
• Long-lasting seal to prevent leaks and UV damage.


• Some users complain that you need to apply two coats for it to work properly.
• A bit on the pricey side.



Dicor Corporation RP-MRC-1 Elastomeric Coating

RV roofs made of metal or fiberglass might benefit from Dicor Corporation RP-MRC-1 Elastomeric Coating. This is a more economical solution, not designed for rubber or TPO roof types.

The brilliant white finish of this coating helps reflect UV rays, prevent damage and keep down high temperatures from the blazing sun inside your RV. Its acrylic resins create a watertight seal to prevent leaks. Apply this product over fiberglass, aluminum, steel or previous coatings.


• Easy to apply liquid.
• Designed to provide protection to fiberglass and metal type roofs.
• Watertight and reflective.
• More economical.


• Requires two coats.
• Won’t work well on rubber or TPO type roofs.
• Not as long-lasting as some products.



Liquid Rubber RV Roof Coating/Sealant

Establishing the mid-range price for RV roof sealants is this Liquid Rubber RV Roof Coating/Sealant. Those who are environmentally conscious will be pleased with this product’s formula.

This is another product that can be applied to multiple types of surfaces, making it a choice for those who aren’t sure what type of roof is on their RV. It creates a watertight membrane with weathering and UV ray protection. You also get reflective properties with this product. There are no solvents or VOC’s in this sealant and it is an easy to apply liquid.


• Easy to use liquid.
• Eco-friendly formula.
• Can be used on multiple roof types.
• Moderately affordable.


• May not apply well over previous coatings.
• Requires several coats to get the protection needed.



RV Trailer Liquid Roof

Another multi-surface product to take into consideration is RV Trailer Liquid Roof. This is a higher end product that performs well over the long-term.

Being lightweight is one of the features of this product, which applies in a thinner layer, but provides all the necessary protection. It comes in liquid for, applies easily to a wide variety of RV roof types, and dries quickly with a seamless chemical bond. You won’t have to reapply this sealant as often as you might in order to get the watertight weathering protection you need.


• Quick and easy to apply with quick cleanup.
• Smoother cleaner appearance.
• Dries quickly and creates a chemical bond.
• Longer-lasting than most brands.


• Almost double the average cost.
• Powerful toxic fumes when applying.



Geocel 28100V Pro Flex Crystal Clear RV Flexible Sealant

Not all RV roof protection requires a full coating, for those occasions when you just need to do some spot work around roof penetrations consider Geocel 28100V Pro Flex Crystal Clear RV Flexible Sealant. This product works well to seal cracks and prevent leaks in rooftop caulking.

Spot work around roof penetrations requires the attention of a watertight caulking, which this product provides. It is a quick fix for a leak or as a way to make sure areas around skylight, vent pipes and HVAC units is properly sealed before you add sealant. It applies easily and dries within 24 hours to create a quality protective seal.


• Works to prevent leaks in roof penetrations.
• Can be used before roof sealant.
• Will work on most surfaces.
• Very flexible solution.


• A bit on the pricey side.
• Not as effective on rubber and TPO type roofs as on metal and fiberglass types.



Geocel 24200 Roof Coating & Sealant

A sealant with a bit more long-lasting durability comes in the form of Geocel 24200 Roof Coating & Sealant. This product adds a feature that other sealants do not have in order to provide a bit more protection.

The addition of fibers into this product’s formula makes it stronger and more durable for coating your RV’s roof. It creates a watertight seal and also protects against mildew and UV damage. It goes on quickly and easily in liquid form and dries rapidly as well. Its fiber protection makes it more durable for roofs that you walk on more periodically.


• Quick and easy coating solution.
• Addition of fibers in the formula add extra strength to its seal.
• Better protection where foot traffic is common.
• Dries quickly so you can get out on the road faster.


• Does not work well with rubber or TPO type roofs.
• Pretty pricey.



RV Roof Sealant FAQs

When choosing a product that protects your investment, most people ask a lot of questions before making their selection. We have anticipated and answered those questions so that you can make a well-informed choice.


Why do you need RV roof sealant?

Roof sealants provide a protective barrier against UV rays as well as preventing leaks. They act a little bit like car wax to protect the finish of your RV’s roof, prolonging its life and eliminating the risk of interior water damage.


How does RV roof sealant work?

That depends on what type of roof is on your RV. Each type of roof sealant works a little bit different. What they have in common is that they seal cracks and leaks while providing protection from weather damage and UV rays.


What are the various types of RV roof sealant?

There are five common types of RV roof sealants, which tend to apply to the type of roof they are designed for. The list includes:

• Aluminum coating, which is not as common in newer models.
• Fiberglass coating, which is still around, but still not among the most common roof types.
• Liquid coatings, which have more of a polymer type of finish similar to car wax.
• Rubber coating, which is designed for the most common roof styles of modern RV’s.
• Roof caulking, which is mostly used to seal cracks around roof penetrations to prevent water leakage.


When should you apply RV roof sealant?

Depending on how much your RV is exposed to the elements, you will want to apply RV sealant every six months to a year. Inspection of calking and seams should be done every six months, but for RVs that are kept indoors or under a cover when not in use, annual sealing is sufficient.


RV Roof Sealants Mini-Buyer’s Guide

There are many different kinds of RV roof sealants, each is best applied in different situations or provides different results. Making the right choice requires a bit of education. Our buyer’s guide will provide some guidance in this area.


Type of Roof

The sealant you use will be dependent upon which type of roof you are going apply it to. Here are the most common types of RV roofs.

• EPDM or Ethylene Propylene Diene Monomer. This is a type of rubber with UV protective qualities, which make it one of the most popular types of roofing on RV’s. Over time, these roofs get a chalky look to them from oxidization.
• TPO or Thermal Poly Olefin. This is also a rubber roof type, which is a little bit more rigid and brilliant than EPDM.
• Fiberglass. Though they are still around, these roof types are not as common as the other two. They oxidize more, like EPDM roof types and work best with a clear coat sealant.
• Aluminum. These roofs are even more rare than fiberglass. They are heavier, but need a little less maintenance on the actual surface. For them, caulking around penetrations is more necessary.


Sealant Purpose

Knowing the goal or objective you hope to achieve is something to keep in mind before choosing a sealant for your RV roof. In some cases, you might only need to do some touchup work around roof penetrations to prevent leaks inside your RV. In others, your objective might be to create an overall, protective barrier against UV or weathering damage to the roof surface of your RV. In the first instance, caulking is the common answer to your needs, while in the second, a roof sealant or coating, which matches your RV’s rood type, is the better option.


UV Protection

The invisible, ultra violet or UV, rays of the sun cause damage to RV roof surfaces through heat and chemical processes. In some cases that damage adds to oxidization, chalkiness or other weathering issues, depending upon roof surface type. Protecting the roof of your RV against UV damage helps prevent it from breaking down too quickly and increases the overall lifespan and value of your RV’s roof. You can accomplish this by applying sealants with UV protection and by keeping your RV covered or out of the elements when it is not in use.



There are several elements involved in the durability of an RV sealant. To begin with, you want a sealant with plenty of elasticity. Elasticity is necessary because your RV is in motion as you travel and is in a state of twisting and flexing as you go down the road. Your sealant needs to remain watertight through this fluidity, which is what elasticity accomplishes. Tear resistance is another aspect of durability. If the surface tears too easily, then the protective layer becomes useless and creates a weak point in the protection of your roof. Rigidity is a final element of sealant durability. Many RVs have areas where foot traffic is pretty common around luggage racks, HVAC systems, etc. Sealants that add a little extra rigidity around these areas, often through adding fibers into the formula, are something to keep in mind as well.



It is a foregone conclusion that you don’t want to spend hours of back-breaking labor to provide the protection your RV roof requires. Consequently, you want to avoid solutions that require scraping off old coatings, applying primer or an activator, and then applying the sealant. Sealants that go on quickly and easily without a lot of preparation are best. In addition, you want something that cleans up easily, dries pretty quickly and allows you to get out on the road as soon as possible without having to wait around for the finish to dry.



Maintaining the investment you put into your RV requires some extra care. A quality roof coating is one way to provide that protection. Using our buyer’s guide has provided you with some basic knowledge of RV roof sealants while answering some of the most common questions users have about them. Our reviews have given you an opportunity to compare various RV roof sealant products that are available on the market in order to give you some idea of what you can expect to find. With combination of this information, you should well-qualified to make an informed choice when it comes to choosing the best product to fit your RV.