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Can You Use Flex Seal On Rv Roofs

How Much Rv Roof Sealant Do I Need

How to apply Flex Seal Liquid to your RV or Trailer roof

The amount of roof sealant needed might depend on the severity and linear feet that you want to repair. You need two coats of EPDM coating if youre repairing a rubber roof. To recoat your RVs roof properly, you might need three coats.

One coat is enough if you like to use a silicone roof sealant, while several coats are needed for acrylic and urethane types of sealants.

For repair tapes, it depends on the width and thickness. A single layer might suffice if you have a wide and thick tape. For narrower and thinner tapes, consider adding an extra layer for reinforcement.

How Do You Repair A Roof On A Travel Trailer

Replacing an RV rubber roof First, take off all of the rooftop objects like the A/C, vents, etc. Remove the old rubber membrane and sub-roof sheeting from the roof. Place a new rubber membrane and sheeting that goes under the rubber. Reinstall the rooftop objects. Apply sealant to all of the seams and joints.

How Do You Reseal Rv Roof Seams

Use a self-leveling sealant, such as Dyco Flow Seal Caulk, to seal roof joints. Inspect all seams yearly and touch up any cracks with the sealer, to ensure you never suffer water damage. Everguard TPO rubber roofing looks more like plastic than rubber. It is more rigid than EPDM, and has a shiny appearance.

Also Check: Cost To Reroof A House In California

What Is The Best Rv Roof Coating

  • Best Overall: Dicor 95D40-35 Epdm Rubber Roof coating.
  • Best For Metal or Fiberglass Roof: Dicor RP-MRC-1 Elastomeric Coating.
  • Best For Spot Sealing: Hengs Rubber Roof coating for rV.
  • Best For Leak Repair and Seam Sealing: EternaBond RSW white RoofSeal Sealant Tape.
  • Best Budget-Friendly: Geocel GC24201 Pro Flex rV coating.
  • Flex Seal Is Not Uv Stabilized

    Can I Use Flex Seal on My RV Roof?

    Flex Seal is not UV-stabilized, which means that its protection is highly unlikely to last in the harshly sunny environments that most RVs experience.

    UV protection is a very important part of any product used to seal any part of your RVs roof. Without UV protection, the product will dry out and crack, and the protection you think youve established will be gone, leaving your rig susceptible to leaks that you may not even be aware of until significant damage has occurred.

    There are hundreds of complaints online about Flex Seal cracking and failing, and its lack of reliable UV stabilization is likely partly to blame.

    Remember that RV manufacturers are well aware of the importance of UV protection and are unlikely to recommend the use of any product that doesnt offer it, particularly for an RV roof.

    Read Also: How To Get Roofing Leads Without Door Knocking

    Geocel Proflexrv Flexible Sealant

    About: This flexible RV roof sealant comes in a 10-ounce tube. Dont use it on TPO or EPDM roofs. However, its great on aluminum, glass, coated steel, steel, wood, fiberglass, and vinyl surfaces.

    At $12 per tube, you should keep a couple of these on hand in case of an emergency. The sealant protects against harsh weather conditions almost immediately after application. A non-stringing formula helps make applying and cleaning up a breeze.

    Sealant Type: The Geocel ProFlex RV is a flexible liquid sealant.

    Best For: If you have a fiberglass roof, this is one of your best options. This is not for use on TPO or EPDM roofing materials.

    Flex Seal For Rv Tank

    There is some better news about Flex Seal in this section. It seems that when the product is applied properly to your black and gray watertanks, or even your fresh water one, the sealant really seals up the leak and holds for along time.

    Flex Seal is designed to seep into the cracks and holes of RV tanks and then dry to a flexible but waterproof compound. After it dries, the seal should handle the vibration of the road and keep your tanks from leaking.

    We should remind you that you need to check with your RV technician to see if the tanks construction material will not be damaged if you use Flex Seal to cover any leaks.

    Also, you should use a liberal amount of the sealant to make sure the crack is completely sealed up. Using a toothbrush or similar small brush should make the task quick and easy to do.

    Recommended Reading: How To Add A Gable Overhang

    Which Type Of Caulk Should You Use On Your Rv

    The abovementioned caulks have plenty of differences between them. Some are intended exclusively for indoor use and others both indoor and outdoor. Even still, some of the caulks formulated for the outdoors cant necessarily withstand the rigors of the environment well, such as vinyl latex caulk.

    Some RV experts recommend silicone-based caulk, but this isnt what wed suggest. The lifespan of silicone, when applied on an RV, can be extraordinarily short, like a few months. You may recall also that silicone caulk doesnt stick to porous surfaces, which would limit how you can use this caulk on your RV.

    Where does that leave you? With adhesive sealant caulk, especially marine-grade stuff. Adhesive sealant caulk can handle getting wet without breaking down in many cases, and its durable and strong. Some adhesive sealant is even crack-proof and others can resist UV rays.

    Here are three types of adhesive sealant caulk wed suggest you use for your RV.

    What Kind Of Rv Roofs Can Be Repaired With Flex Seal

    Can You RESEAL AN RV ROOF with Flex Seal? RV Leak Repair DIY with Liquid Sealant

    There are two primary materials designed and used specifically for RV rubber roofs. They are EPDM and TPO. Both TPO and EPDM are classified as rubber roofs, but they are a bit different in form and appearance.


    TPO RV roofing is the most popular option for RV roofs in use today. It is a popular choice because it is inexpensive to buy and its white. The TPO membrane has a shiny, laminate appearance with the outer layer having a plastic look and feel to it. It can either be fitted with screws or otherwise mechanically attached. It can also be glued down. When it comes to detailed work and seams, both glue and heat can be used to create a seal.

    EPDM Rubber Roofs

    EPDM is a second popular option for RV roofing. It differs from TPO in several ways. EPDM is a synthetic rubber material which can be vulcanized. This means it can be dried and cured to form sheets. Alternatively, you can also use EPDM in its un-vulcanized form. In this form, itll never completely solidify. Its relatively common to use both EDPM types together for an RV roof. Vulcanized EPDM would be used for the roof membrane, while non-vulcanized EPDM can be used for any flashing or detail work. EPDM rubber roofs are usually maintenance-free for about ten years, but they will oxidize over time.

    Fiberglass Roofs

    Metal RV Roofs

    Recommended Reading: Rv Rubber Roof Repair Kit

    How To Know If Flex Seal Has Been Applied Correctly

    A true test is passed by flex seal when the leakage gets blocked and the walls supporting the roof do not show signs of leakages. The perfect example of flex seal working is when the holes are completely filled in and the problems that were faced previously are resolved.

    It is an errand work and can be completed by the person any weekend. Unlike full-time repair, a flex seal can be done by you instantly and the problems can be fixed quickly.

    The patchwork can then be covered with the color of the rest of the roof and your roof is ready to go.

    Roll Or Brush Liquid Rubber Onto Your Rv Roof

    It is time to apply a generous amount of liquid rubber to the leak area and the surrounding surface.

    As a rule of thumb, it is best to apply liquid rubber over a surface area that extends at least six inches in each direction away from the primary location of the leak.

    If your leak is on a flat part of your roof, this should not be a problem. But if the leak is right next to a roof vent, air conditioning unit, or the edge of your roof, it may not always be possible. In these cases, you will need to use your brush to apply liquid rubber.

    For leaks on an especially hard-to-reach location, you should also consider switching to Flex Seal Spray or Flex Shot for an alternative application method.

    Regardless of the product you wind up using, however, the intent, is to apply a thick enough layer to completely seal the leak from future water ingress.

    Recommended Reading: Skylight Metal Roof

    When May I Want To Use Flex Tape

    Good question. And at first we were a little confused about what we would use it for too. But it dawned on us quickly: any situation where we would have used an adhesive tape or a hot glue gun anyway. Flex Tape is a faster, simpler solution than either of those, and the results last longer too. If you have a leaky pipe, just stick it on, no need to dry or clean or line it up perfectly. If you need to fix a puncture in an inflatable, same thing. You can even use it to temporarily seal leaky car windows, or block out draughts. Basically anything.

    Can Flex Seal Be Used On Rv Roofs

    Can I Use Flex Seal on My RV Roof?

    There should be little problem in using Flex Seal on your RVs roof. As long as you follow the application instructions you should be able to seal up any leak on your roof with Flex Seal.

    But, there is a word of warning with that. Flex Seal contains petroleum products. These products are not good with many rubber roofs or with fiberglass siding. You would need to check with an RV tech about the characteristics of your roof and see if it will be damaged by petroleum products.

    Also, it may take a few months but UV rays can damage and weaken Flex Seal so it would not be a permanent fix. When you apply it to your leaky roof area, make sure you have cleaned the old sealant out, and the whole area is very, very clean. If not, Flex Seal may not adhere to the RVs roof.

    Also Check: How Much Shingle Roof Cost

    Who Makes The Best Rv Roof Sealant

    Dicor makes the top-rated RV roof sealant because all their RV roof sealants adhere well to any surface. Theyre also weather-resistant to endure the extreme weather conditions outside. Dicor 501LSW-1 offers a self-leveling feature, while the BT-1834-1 butyl tape can be shaped in unique patterns to fix uniquely shaped joints.

    A good contender is EternaBond because it makes the toughest repair tape out there. For example, its RW-4-50 provides the strongest bond for any surface. This brand sticks easily using gentle hand pressure.

    Clearly Identify The Location Of The Leak

    This can sometimes be the hardest part about using Flex Seal on RV roof leaks.

    Water can sometimes be entering the substructure of your RV at one location and then running down or across your rig before it drips inside.

    So you really need to perform a thorough visual inspection of your roof in order to determine where your leak is coming from.

    You may even need to pull up certain parts of the outer roofing layer in order to better identify the locations of leaks.

    That being said, the good news about this Flex Seal product is that you can apply it liberally.

    Sure, it may not look the most appealing once you are done, but not many people are going to lay eyes on the roof of your RV anyway.

    Identifying the proper location of your leak will help you address the problem at its headwaters, so to speak.

    But if you have identified multiple potential culprits, go ahead and apply liquid rubber to each spot to cover your bases.

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    Are Leak Seal And Flex Seal The Same

    Because its always the small things that get in the way the most, leaks worsen and lead to major problems overtime, which is why they need to be repaired immediately and efficiently.

    Both Rust-Oleum Leak Seal and the American favorite, Flex Seal, are excellent choices for seal leaks as they are easy-to-use, durable, and inexpensive.

    The liquid formulations dry quickly in order to fill holes and to provide a firm-yet-flexible protection against moisture and rust on a number of surfaces.

    Simply spray the can of rubber sealant on the crack of your RV roof, and youre good to go.

    End of the story, right? NO. Thats where youre wrong.

    You see, while both products are designed to seal in leaks, they are NOT the same.

    This may be confusing for a lot of people, and we dont blame you. Being used as sealing tapes or in spray cans, they are similar in a lot of ways.

    HOWEVER, Flex Seal and Leak Seal uniquely cater to specific purposes and arent made of the same stuff.

    Is Flex Seal Spray Waterproof

    RV Roof Sealing and Repair with Flex Seal – A great RV Roof Leak Fix!

    14 Oz, Flex Seal, Clear, liquid rubber coating spray that turns into a durable waterproof barrier. Its easy to use and comes in a portable aerosol spray can. Flex Seal sprays out as a liquid, seeping into cracks and holes, and then dries to a rubberized coating. Flex Seal stops vibrations and deadens noise.

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    Lippert Components 1021 Lap Sealant

    The Lippert Components 1021 Sealant is designed to endure outdoor transportation and weather. It comes packed in a 304.6-ml tube with a spout for easy application. It can work on a variety of roof materials, including glass, metal, and rubber.

    I like this self-leveling lap sealant because its available in various colors to suit your RVs roof. Mine is white, so I chose the white color variant. Other colors include beige, almond, and gray.

    This liquid roof sealant flows easily, so it suits best for horizontal surfaces. A small amount is cost-effective because a ΒΌ-inch bead is enough to cover a 30 linear-feet area. I tried using this product to seal the skylights on my roof, and Im impressed with its excellent performance.

    The thing I love best is the scent of this rubber roof sealant because its devoid of any paint smell. I believe that the formula is low in volatile organic compounds , which explains its faint smell. And once the product is cured, you can paint it over with your favorite color.

    • Not suitable for vertical applications
    • Comes in a small tube

    Acrylic Tile Sealant Caulk

    For small patchworks across the house, acrylic tile sealant caulk is reliable. You cant really use it anywhere thats wet, but this caulk does have some resistance to mildew and mold. One perk is that you can paint over acrylic tile sealant caulk so it blends into the rest of the caulk. An application may last for years.

    Read Also: Large Overhang Roof

    Reasons Not To Use Flex Seal On An Rv Roof

    There are a variety of products on the market for use on an RV roof. These products are intended to effectively seal areas of your rigs roof to prevent leaks that can eventually seriously impact the structural integrity of your RV. So, products like these are no minor consideration.

    When the roof of an RV is not properly maintained, serious damage can occur before you even know its there. This is why using the appropriate repair products is so important.

    When it comes to preventing leaks, you want the best product for the job. And generally speaking, your RVs manufacturer has some opinions and recommendations about this very important maintenance matter as well.

    Here are several reasons why the RVgeeks and many RV techs and RV manufacturers are unlikely to recommend Flex Seal as a first-choice option for RV roof maintenance and repair.

    Liquid Rubber Rv Roof Coating

    Can I Use Flex Seal on My RV Roof?  RVBlogger in 2020 ...

    This Liquid Rubber RV roof coating is quite heavy duty, boasting 1000% elongation, which basically means that it will flex with your RVs roof instead of cracking. It protects your roof from UV rays and water, and insulates the interior of your RV against heat from the sun.

    The manufacturer recommends using a small paintbrush to coat the edges of your roof, and then filling in the center part by pouring the product onto the roof and smoothing it around the surface with a roller. For best results, apply it when the ambient temperature is over 50 degrees Fahrenheit.

    It comes in one-gallon and five-gallon buckets. The only drawback to this roof coating is that it requires two or three heavy coats to be fully effective, and each gallon only covers about 50 square feet. So, completely coating your roof with the recommended number of coats could require quite a lot of this product.

    More info:

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    Use A Degreaser To Remove Oil Or Residue

    Even if theres no visible oil leftover from your hands or cleaning products, its a good idea to use a degreaser or solvent like rubbing alcohol on the area before you apply tape. This helps ensure good adhesion and will help the seal last longer.

    In addition, you should make sure you have clean hands so that dirt and oil from your skin wont taint the adhesive.

    Flex Shot Fsh8w White

    Flex Seals Flex Shot product is designed for hard-to-reach locations on your RV roof and in other areas.

    This product can be useful for sealing around the cover of your RV air conditioning unit, for example.

    Flex Shot also works well for caulking around your RV windows when you can take the time to make sure you are doing a careful and visually appealing job.

    Once applied, the solution expands to fill cracks and holes to prevent future leaks.

    Read Also: How Many Screws Per Square For Metal Roofing


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