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Best RV Roof Sealant of 2020: Save Your Camper!

If you own an RV, then you know how susceptible the roof is to the elements. Protecting your roof with a sealant will spare you from emergency leaks and unrepairable damage. A roof sealant will keep you cozy and dry inside your RV even with a storm is raging outside.

You want to find the right roof sealant, though. There are many of them avaiable with different compositions, thicknesses, and functions. In addition, there are quite a few other things to consider — budget, use, sealant specifications, and so on.

The Best RV Roof Sealant

Geocel Pro Flex Sealant
10 oz
EternaBond RoofSeal
50 ft
Proguard EPDM Rubber
10.1 oz

1. Geocel Pro Flex RV Sealant

This sealant’s chemical composition makes it perfect for sealing aluminum, steel (plain and coated), glass, fiberglass, vinyl, and wood — materials that are commonly used to build RVs, campers, and trailers. The sealant's tripolymer formula enables it to form a watertight seal even when the surfaces it's applied to are oily, wet, or frozen.

Since it's flexible, the sealant works well when applied to your RV's movable joints. Also, its sealing effect works immediately after application, no matter the temperature or the weather, and it is non-stringing and can be easily applied and cleaned up.

After the application, you don’t need to wait to drive anywhere in your vehicle. The superior elastic and adhesion properties of the tripolymer sealant make it a better choice than silicone sealants. In addition, the sealant comes in five colors – clear, white, bright white, almond, and black, and you can easily apply it over a previously applied sealant too.

2. EternaBond RoofSeal Sealant Tape

RoofSeal tapes can be used to repair non-pressurized leaks and for corrosion protection, especially on RV roofs. You can use the tape on a range of roof materials such as wood, rubber, metal, tiles, concrete, PVC, TPO, EPDM, fiberglass, and more. The tape can seal any tears and joints in the roof, skylights, copings, and gutters. It is even useful for sealing the liners of ponds and landfills.

EternaBond’s trademark MicroSealant technology gives RoofSeal the capability to make watertight and airtight barriers on roofs. The MicroSealant contains thermoplastic, synthetic resin, and non-curing rubber. It has a UV stable backing and a built-in primer that helps the sealant to adhere easily to any surface.

The elongation factor of the sealing tape is more than 700%. So, RoofSeal can expand and contract as per the weather conditions and ensure that the roof remains sealed.

Since the tape is also very flexible, you can fold and wrap it, even over itself. It is also available in white, grey, tan, and black.

3. Proguard Liquid Roof Sealant

This EPDM liquid sealant is ideal for waterproofing all types of RV roofs, including aluminum, steel, PVC, rubber, fiberglass, and wood. It is quite easy to apply, even if you have never sealed an RV roof before. Also, a gallon of sealant can cover an area between 42 and 46 feet, so it turns out to be cost-effective.

You only need to paint on a single layer of the sealant, as it dries quickly. It is effective immediately after application and forms a white, shiny, rubbery film that’s 20 to 30 mil (0.02 to 0.03 inches) thick.

The coating’s adhesive properties can withstand temperatures as low as freezing to as high as 300 degrees Fahrenheit. Additionally, since the sealant has superior reflective properties, it keeps the area underneath the coated roof cooler than it would otherwise be, which means you can save on air conditioning costs. What’s more, the sealant also has noise-absorbing properties.

4. Heng's NuFlex RV Sealant

When you’re installing vents, skylights, air conditioning units, and other essentials, you must make joints for their installation. You then have to waterproof these joints to prevent the roof from leaking when it rains.

Luckily, this white sealant makes it easy to seal joints on horizontal surfaces like RV roofs. In addition to that, it can also seal concrete floors, swimming pool decks, garages, driveways, and sidewalks.

It is made of neutral cure elastomeric silicone. Its fluidity makes it self-leveling, so you can easily (and quickly) apply it to a surface. Also, it adheres tightly, even without a primer.

However, the sealant takes two hours to cure, and it is necessary to ensure that it does not come into contact with water before that time is up. Once cured, it becomes strong and flexible. As a result, it will not crack and will last for a long time.

5. ToughGrade RV Roof Sealant

This LED light has a color temperature of 5000K and emits a cold white light. Along with being energy efficient, it is also ideal for working in your garage.

Whether it be for car repairs, welding, or woodworking, the bright illumination will not strain your eyes or induce a headache. Even though this type of light is more common in commercial buildings, you can also install it outdoors in areas that are not directly exposed to rain or sunlight.

Using wall anchors and screws, you can surface-mount the light on drywall or wooden surfaces. You can also suspend the light using height-adjustable steel cables that come with attachment anchors and loops. The pack includes the hardware for this, but for corner-mounting of the lights, you will have to get your own 45 degrees angle brackets. Still, the integrated fixture has end connectors through which you can connect other light fixtures to form a series.

What to Look for RV Roof Sealant

rv roof sealant

Regular exposure to different elements can take a toll on an RV over time. The roof might develop heat-induced cracks that can later catch rain. When this rainwater freezes, it will expand and enlarge the cracks. So unless you address the issue right away, your RV is going to end up with a leaky roof.

Liquid Roof Sealant Vs. Self-Priming, Adhesive Roof Sealant Tape

Roof sealants are available in liquid form and as an adhesive tape. To decide which one of these will suit you, we will need to consider the area we want to seal and the type of sealant that is easiest to apply.

Using a Sealant Tape

Of the two, adhesive roof sealant tape is quicker and simpler to install. You can use it to cover flat surfaces as well as apply it in tight corners.

As soon as it is in place, you are good to go. There is no need to wait around for it to dry or cure. Also, if you make a mistake while installing the tape, we can remove it without making a mess and start over again.

Using a Liquid Sealant

Liquid roof sealants are effective and can offer a permanent watertight finish. However, even though they can usually be used on various roof materials, some have material-specific formulas.

In addition to sealing the roof against leaks, these sealants can offer protection from excessive heat and UV radiation. They also prevent or minimize energy loss and are easy to apply.

The best part? You can correct any application mistakes by removing the sealant or applying a fresh layer over the previous coating.

Factors to Consider Before Choosing an RV Roof Sealant


The roof sealant you use must be able to bond well with your RV’s roof. So, it’s crucial to know if the roof is made of Ethylene Propylene Diene Monomer (EPDM), Thermal Polyolefin (TPO), or some other roof material. Once we figure that out, we can find a material-specific formulated sealant for it.

Please note that you may have to clean the roof before you apply the sealant. Also, if the RV roof has too many cracks, you might have to buy more sealant.


The reason we are looking for a sealant in the first place is because of issues caused by weather-related expansions and contractions. Since environmental changes will continue to affect the roof, we want a sealant that can conform to these changes.

We also want the sealant to withstand foot and vehicular traffic vibrations. Otherwise, we will end up with a cracked or torn sealant. To avoid that, we need to buy an option with superior elastic properties.


In addition to sealing the roof, the sealant can also shield it from high temperatures and UV damage. A roof sealant with high reflective properties will deflect heat and light rays away from your RV. As a result, you will have a pleasantly cool interior and a well-protected exterior.


The garage lighting that you choose to install can affect overall visibility and garage safety. However, you may need to buy several light units to get the required level of brightness, which would certainly make a dent in your budget.

So, it’s important to choose carefully and never shop in a hurry. You don’t want to end up with expensive lights that are too dim for your needs. To avoid that, it will help to consider the factors we discussed like lumen output and color temperature.


Richard Reed
I've been a General Manager of a moving company and I've also been a Professional Mover for over 30 years. I've driven flat beds, reefers, dropdecks, moving vans, heavy machinery, etc. In my time as a Mover I've driven over 1,000,000 safe miles. My days of moving and driving truck are past me but The Vehicle Lab allows me to share the knowledge I've gained over the past 40 years.

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