Car Care

The 10 Best RV Roof Sealants of 2021

Best RV Roof Sealants

As time goes by, you'll discover either cracks or other aging signs affecting your RV roof, so you'll need to take care of it to prevent further deterioration. And the easiest way to do this is by applying the best RV roof sealants.

A leaking RV roof is not just bad because it lets water get inside, it can also damage your entire RV drastically and cut its market value. With a good sealant, you can easily repair any cracks and dings that may result in water leakage.

And to help you find the right product for repairing your RV roof, here we look at some top-rated options in the market and provide a buying guide.

10 Best RV Roof Sealants – Review

IMAGE

PRODUCT

FEATURES

EternaBond RoofSeal Sealant Tape

1. EternaBond RSW-4-50 (Best Overall)

  • UV-stabilized tape lasts 19 years
  • High elongation factor
  • Silicone lining on adhesive side
  • Simple installation
Dicor 501LSW-1 Lap Sealant

2. Dicor 501LSW-1 (Best Budget)

  • More affordable
  • Self-leveling 
  • Works on all types of materials
  • Color-matched and UV stabilized
Geocel 28100V ProFlex Flexible RV Roof Sealant Tube

3. Geocel GC28100 (Best Clear & Flexible)

  • Clear and flexible sealant for all materials
  • Non-cracking once cured
  • Lasts up to 25 years
  • Mildew and UV resistant
Geocel GC24200

4. Geocel GC24200 (Best for Multi-Purpose)

  • Multipurpose sealant
  • Brushable for easy application
  • Includes fiber for extra strength
  • UV, mildew, & acid rain resistant
Proguard Liquid Roof 4-Gallon RV Roof Sealant

5. Proguard F9991-4 (Best Rubber Type)

  • Durable rubber sealant
  • Large 4 gallons of liquid sealant
  • Forms as seamless roofing membrane
  • Applies like paint
Dicor 551LSW1

6. Dicor 551LSW1 (Non-Leveling)

  • Non-leveling for vertical application
  • Stain-free
  • Remains flexible
  • Watertight seals
L R 24101

7. L R 24101 (Flexible & Protective)

  • 1,000% elongation
  • Protects all kinds of roof materials
  • Applies like paint
  • Environment-friendly
Beech Lane BL-102

8. Beech Lane BL-102 (Instant & Permanent Leak Repair)

  • Self-priming technology
  • UV-resistant and weatherproof
  • Permanent leak repair
  • Simple DIY installation
L R 22602

9. L R 22602 (Waterproof Indoor/Outdoor Sealant)

  • Completely waterproof sealant
  • Great for both indoor and outdoor use
  • 1,000% elongation
  • Water-based formulation
3M Adhesive 5200

10. 3M Adhesive 5200 (High-Strength Adhesive Sealant)

  • High-strength polyurethane polymer
  • Crack and peel-free
  • No mixing required
  • Adheres to different materials

PRODUCT

1. EternaBond RSW-4-50

(Best Overall)

EternaBond RoofSeal Sealant Tape
  • UV-stabilized tape lasts 19 years
  • High elongation factor
  • Silicone lining on adhesive side
  • Simple installation

2. Dicor 501LSW-1

(Best Budget)

Dicor 501LSW-1 Lap Sealant
  • More affordable
  • Self-leveling 
  • Works on all types of materials
  • Color-matched and UV stabilized

3. Geocel GC28100

(Best Clear & Flexible)

Geocel 28100V ProFlex Flexible RV Roof Sealant Tube
  • Clear and flexible sealant for all materials
  • Non-cracking once cured
  • Lasts up to 25 years
  • Mildew and UV resistant

4. Geocel GC24200

(Best for Multipurpose)

Geocel GC24200
  • Multipurpose sealant
  • Brushable for easy application
  • Includes fiber for extra strength
  • UV, mildew, & acid rain resistant

5. Proguard F9991-4

(Best Rubber Type)

Proguard Liquid Roof 4-Gallon RV Roof Sealant
  • Durable rubber sealant
  • Large 4 gallons of liquid sealant
  • Forms as seamless roofing membrane
  • Applies like paint

6. Dicor 551LSW1

(Non-Leveling)

Dicor 551LSW1
  • Non-leveling for vertical application
  • Stain-free
  • Remains flexible
  • Watertight seals

7. L R 24101

(Flexible & Protective)

L R 24101
  • 1,000% elongation
  • Protects all kinds of roof materials
  • Applies like paint
  • Environment-friendly

8. Beech Lane BL-102

(Instant & Permanent Leak Repair)

Beech Lane BL-102
  • Self-priming technology
  • UV-resistant and weatherproof
  • Permanent leak repair
  • Simple DIY installation

9. L R 22602

(Waterproof Indoor/Outdoor Sealant)

L R 22602
  • Completely waterproof sealant
  • Great for both indoor and outdoor use
  • 1,000% elongation
  • Water-based formulation

10. 3M Adhesive 5200

(High-Strength Adhesive Sealant)

3M Adhesive 5200
  • High-strength polyurethane polymer
  • Crack and peel-free
  • No mixing required
  • Adheres to different materials

1. EternaBond RSW-4-50 – Best Overall

EternaBond RoofSeal Sealant Tape

Photo: EternaBond

The highlight of this EternaBond tape though is its specialized backing, which is very UV stable and has been proven to last up to 19 years under full sunlight. And this is what makes it our best overall and top recommendation.

Sometimes, a simple tape is all you need to seal your leaking RV rooftop, and this RoofSeal tape from EternaBond is not just a good RV roof sealant, but it's also very flexible, being able to stretch up to 700%. 

You can use it on a variety of rooftops, including EPDM, TPO, PVC, wood, concrete, metals, and more. It will even work inside ponds because it comes with a built-in primer that allows it to bond perfectly with any surface it's installed on.

Besides this 4-inch RoofSeal option, this tape is also available in the 2-inch EternaBond RSW-2-50, and the 6-inch EternaBond RSW-6-50.

While it is a little pricey for a tape, it's worth it as it does a fantastic job. And although it is also not color-matched, white seems to work fine enough for most roofs.

Pros:

  • UV stable and highly durable
  • Easily seals any tear or rip on your RV roof
  • Works on all roofing materials
  • Full flexibility in all conditions

Cons:

  • It's a little pricey
  • The tape offer isn't color matched

2. Dicor 501LSW-1 – Best Budget

Dicor 501LSW-1 Lap Sealant

Photo: Dicor

Many RV and trailer owners turn to Dicor when it's time to seal their roof edges, vent pipes, air vents, and anything else that's important. And their Dicor 501LSW-1  is a perfect pick when you want a more affordable solution for sealing RV roofs.

The sealant is one of the best self-leveling RV roof sealants, so you get a nice and clean seal every time. Although this offer is for the white color, Dicor lap sealants are color-matched, allowing you to choose from a variety of available colors.

It sticks very tightly to different materials, including EPDM, TPO, mortar, aluminum, fiberglass, vinyl, concrete, and lots more. Usage of this sealant is simple and it skins over after you apply it in just 5 minutes, gets waterproof in 4 hours and is 80% cured by 48 hours.

For 100% cure though, you'll need to wait for a full month. This offer is for the 8-oz tube, which is okay for minor repairs. You might need up to 10 tubes or more to seal your entire RV, depending on its size. Luckily there is the Dicor 501LSW-1 4-pack to help give you more value for money.

Also, it is self-leveling, so it will not work well vertically, but for roofs, you will hardly ever need to use it vertically.

Pros:

  • Relatively more affordable
  • Ideal for different roof materials 
  • Creates watertight seals
  • UV stabilized to cut down deterioration
  • Available in many colors

Cons:

  • Can't work well vertically
  • Little product in tube

3. Geocel GC28100 – Best Clear RV Roof Sealant

Geocel 28100V ProFlex Flexible RV Roof Sealant Tube

Photo: Geocel

One outstanding feature of this roof sealant is that it comes in a clear form that will allow it to work on any roof color.

The formulation of this flexible sealant also makes it one of the best motorhome roof sealants. It is non-stringing, making it easy to apply, and if you happen to make any mistakes, then it's easy to clean up as well.

It's designed for application on wood, vinyl, fiberglass, steel, aluminum, and glass. It sticks very well to most surfaces, including damp ones, and it'll not crack once cured.

Besides being both mildew and UV resistant, this sealant is also highly durable as it has a service life of up to 25 years.

You can paint it after application, apply it on top of its previous application and it'll hold well. 

When dry, this sealant seems a little too slick, which is something some users might not like. However, this does not make it less effective in any way.

Pros:

  • Clear and flexible
  • Long-lasting and crack-resistant sealant
  • Can get applied over itself
  • UV and mildew resistant

Cons:

  • Very shiny and can stand out when cured

4. Geocel GC24200 – Best Multi-Purpose Brushable Sealant

Geocel GC24200

Photo: Geocel

Geocel designs this roof sealant for multipurpose use as it will be ideal for use wood, vinyl, steel, sheet metal, and similar materials. It needs no primer, so a single application is enough, and you can even paint it over when you're done.

This RV roof sealant offers a feature that's absent in most of the offers on this list. It's fibered for strength and strong enough to withstand intermittent foot traffic.

It's also mildew and UV resistant, it quickly withstands water after application and cures so fast that your RV will be ready for the road in just one hour after application. This makes it one of the best camper roof sealants in the market.

The major drawback of this camper roof sealant is that you can't use it to coat EPDM, TPO, or Polystyrene tops, else it's a very nice material with very nice and valuable features. Also, there is only one color option, but this should also not be a big concern.

Pros:

  • Works on all roof materials
  • Needs no primer, one step application only
  • Includes extra fiber for extra strength
  • Can withstand foot traffic
  • Your RV is roadworthy after an hour of application

Cons:

  • Not for use on EPDM, TPO, or Polystyrene
  • Only available in white

5. Proguard F9991-4 – Best Rubber RV Roof Sealant

Proguard Liquid Roof 4-Gallon RV Roof Sealant

Photo: Proguard

What you get with the Proguard F9991-4 is 4 gallons of the best RV rubber roof sealant that will ensure you get a long-lasting seal that also helps the roof maintain a pleasant look.

Proguard's Liquid Roof sealant is a true EPDM rubber-based sealant, designed specifically for recreational vehicles. This 4-gallon offer will give you a 168 sq. ft cover of about 20-mil dry film.

The application is easy as it will apply like paint. The 4-gallon pail includes extra space on the top for the catalyst it comes with. The catalyst is premixed, so you just pour it in and get to work, without needing an extra container.

Another advantage of this offer is that you get to save some money compared to buying 1-gallon sizes. Proguard backs it with a 5-year warranty. And the only drawback is that you only get one color option, which can be a little limiting but still okay.

Pros:

  • High-quality rubber sealant
  • Lots of product n the container
  • Package comes with everything you need to get started
  • Saves you some money

Cons:

  • It's only available in white

6. Dicor 551LSW1 – Non-Leveling RV Roof Sealant

Dicor 551LSW1

Photo: Dicor

A non-leveling roof sealant like the Dicor 551LSW1 makes a fantastic buy as it will be more versatile since you can use it both vertically and horizontally.

Besides non-leveling, there is still more to this product such as the fact that it will work well on all roofing materials, and hence making it quite handy around the home.

This sealant will not leave any stains on your roof, and when it dries it will create a watertight seal to keep water out. Also, many RV owners will love that even once cured it will still be quite flexible.

The nozzle on the bottle needs a design improvement to make it easier to use, and it should also be better quality. However, it still dispenses the produce fairly well.

Pros:

  • Does not self-level after application
  • Stain-free sealant
  • Creates a watertight seal
  • Remains flexible when dry
  • Works for all roof materials

Cons:

  • Bottle nozzle need improvement

7. L R 24101 – Flexible & Protective RV Roof Sealant

L R 24101

Photo: L R

With up to 1,000% elongation, this will be a more flexible roof sealant that you can be sure will prevent adhesion failure. Besides flexibility, it will also help you protect all kinds of roof as it will adhere to a wide variety of materials.

Because this sealant applies just like paint, you can be sure it will be super easy to apply as you will only need to brush it onto the roof surface.

You can use this sealant with the peace of mind of knowing that you will not be ruining the environment as it has a water-based formula that makes it more Eco-friendly. And once dry, it will be UV-resistant.

This sealant has a relatively long drying time, and so it will remain sticky for quite some time. However, the quality of seal that you will get makes it worth the wait.

Pros:

  • Greater elongation for maximum flexibility
  • Works on all kinds of roofs
  • Super easy to apply
  • Eco-friendly water-based formula
  • UV-resistant sealant

Cons:

  • Long dry time

8. Beech Lane BL-102 – Instant & Permanent Leak Repair

Beech Lane BL-102

Photo: Beech Lane

Beech Lane BL-102 RV roof tape sealant uses a self-priming technology to ensure that you will get an instant seal. What's more, the seal that you get is permanent, and the manufacture also provides a lifetime warranty to give you some assurances of this.

Because this tape is designed for DIY application, it is super easy to apply. Many uses will also love that besides silicone, it will adhere perfectly on different kinds of material.

Also, you will never have to worry about leaving your RV out in the sun as this tape is UV resistant. Besides the sun, this is also an all weather resistant tape that you can be certain will give you great service all year round.

The texture of this tape is perhaps its main drawback as it can feel a little chalky, but this does not make it any less effective or useful.

Pros:

  • Provides an instant seal
  • Resistant to UV
  • Repairs leaks permanently
  • Easy to install on your own
  • Lifetime warranty

Cons:

  • Chalky texture

9. L R 22602 – Waterproof Indoor & Outdoor Sealant

L R 22602

Photo: L R

The completely waterproof L R 22602 ensures you will never have to worry about leaking RV roof again. Better yet, this sealant will be ideal for use both indoors and outdoors, and it is also applicable on both vertical and horizontal surfaces.

What many users will love most about this sealant is that, besides being highly durable, it is also more flexible as it has 1,000% elongation, which prevents adhesion failure.

The water-based formulation also makes this a more Eco-friendly roof sealant that will be safe for both humans and pets. And with the wider coverage of up to 30 square feet per gallon, a little of this product also goes a long way, which saves you cash.

This product seems to produce an unpleasant odor but provided you apply in a well-ventilated place the smell should not be a problem.  Also, the odor dissipates quite fast.

Pros:

  • Waterproof sealant
  • Works well for both indoor and outdoor surfaces
  • Durable and flexible seals
  • More environment-friendly
  • Relatively wider coverage

Cons:

  • Unpleasant odor

10. 3M Adhesive 5200 – High-Strength Adhesive Sealant

3M Adhesive 5200

Photo: 3M

The 3M Adhesive 5200 offers superior strength polyurethane polymers that will provide a permanent bond that repairs leaks on RVs, boats and other vessels permanently. 

This roof sealant will be ideal for use on a wide variety of materials from wood to fiberglass, and hence allowing you to use it on almost any roof type.

Once you have the seal on your roof, it will not peel or scratch, which ensures you will never have to worry about leaks for a long time to come. And because there is no mixing requires, this will be a super easy sealant to apply.

This sealant can take up to 7 days to cure permanently, which means a longer wait time. However, the seal that you get makes it worth the wait. Better yet, the seal should be dry enough for handling in as little as 48 hours.

Pros:

  • Superior strength seals
  • Bonds on different materials
  • Seal will not crack or peel
  • Easy to apply with no mixing required

Cons:

  • Long cure time

How to Buy the Best RV Roof Sealants

How to Buy the Best RV Roof Sealant

1. Types of RV Roof Sealants

As you shop for an RV roof sealant, you will first need to decide which type to buy. And here the main types are liquid, tape, adhesive and self-leveling. Each of these sealants will be ideal for different kinds of situations.

Liquid

Liquid RV sealants like Proguard F9991-4 are easy to apply, which is what makes them some of the most popular types. Also, these sealants are naturally water-repellent, and they offer UV protection. However, liquid sealants will not foam a very thick seal and may require more than one coat.

Tape

Tape roof sealants are an adhesive type that will come in a continuous roll for smooth and easy application. With these sealants, you get a neat seal and with no mess to clean up afterwards. Also, with tape sealants like the EternaBond RSW-4-50, there will be no dry time, and so you can paint over them immediately.

Adhesive

Adhesive roof sealants like the 3M Adhesive 5200 are mostly made from polyurethane polymers, and they will provide a super string and permanent bond for different roof materials.

Self-Leveling

The self-leveling sealants such as Dicor 501LSW-1 will have an accelerated curing capacity and will also level out on their own once applied, and hence minimizing what the users need to do for quicker application. The only drawback is that they are not very good for vertical application.

2. Roofing Material

The exact kind of material used for the roof is also important because it helps in determining the best RV roof sealant that you need to buy. There are three major types of roofing materials, and they are as follows:

Rubber. Rubber is the most popular type of roofing material that you'll see on RVs and for the simple reason that it's lightweight and cheap.

On the flip side, rubber RV roofs are not always structurally strong enough to support heavy weights or impacts. There are two major materials for making rubber roofs, and they are EPDM and TPO.

  • EPDM. The name EPDM stands for Ethylene Propylene Diene Monomer. It is quite rubbery and needs no extra UV protectant but It does need regular re-coating. Over time, EPDM RV roofs start to look chalky from oxidation.
  • TPO. This is the second type of RV rubber roof and it stands for Thermal Poly Olefin. It is much more rigid than EPDM and a lot more shiny as well.

Fiberglass. Fewer RV roofs get made using fiberglass than with rubber, but they do exist. Fiberglass roofs can oxidize like EPDM roofs do, but when coated with clear coat, they are vibrant and can shine.

Aluminum. Aluminum roofs are even rarer than fiberglass roofs, but they are the most stable and need the least maintenance. Aluminum roofs are heavy and so, not used much. If a repair does arise, then you'll mostly need a tube sealant.

3. Elasticity & Tear Resistance

Elasticity is a sealant's ability to twist or turn without losing its sealing properties. Tear resistance, however, refers to its raw strength and how much force it can withstand before breaking up.

This refers to both liquid sealants and tapes. For tapes, you want a material that's flexible and difficult to tear, while liquid sealants need some flexibility to accommodate changes.

You'll have to keep this in mind when making your choice of the best trailer roof sealant because you need to use the right materials in the right spots. A very rubbery sealant is ideal for joints that expand and contract, while a stronger or rigid sealant is great for areas that have to support some weight.

4. UV-Resistance

UV or Ultra Violet rays are non-visible radiation from the sun that causes chemical reactions in many substances. With your RV rooftop, it causes it to wear out over time.

There are two solutions here that you should combine for best results. The first is to get a roof sealant with UV-resistance to maximize its lifespan. The second solution is to get a cover for your RV, to protect it from harsh weather when not in use.

5. Ease of Application

You don't want to buy a sealant, only to realize later that you'll need something else that you don't have at hand like a primer or an activator. So, check well at first. You also want a sealant that's easy to apply and clean up when necessary.

FAQs

Q: How does RV Roof Sealants Differ from Coating?

A: RV roof sealants are meant to seal or repair cracks on the roof to prevent leaks, while the coatings are meant to cover up imperfection to improve the overall aesthetic appeal of the roof.

Q: What is the Best Way to Apply RV Roof Sealants?

A: It depends on the specific type you have. For example, for the liquid types, the best way is to brush it on the crack. Others like the polyurethane adhesives will come in bottle that has a long nozzle for applications. But, with all types, you need to make sure the surface is clean before application for the best results.

Conclusion

Coming to the end of this RV roof sealants review, you've seen all the great offers out there, as well as the different situations that they're best suited for. And now you only need to choose what you think will suit your situation.

From our list, the EternaBond RSW-4-50 takes our best overall spot as it is a long-lasting sealant with superior elongation factor and easy application.

However, the Dicor 501LSW-1 is what we would recommend for a budget shopper. And besides being inexpensive, this RV roof sealant is self-leveling and will work on all roof materials.

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