Choosing the Right RV Sealants for Your Vehicle

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RV sealants are essential for keeping out moisture and maintaining a firm bond between the components of your RV. It’s very important for the lifespan of your RV that you complete regular inspections to ensure your RV sealants don’t have any cracks or gaps that might lead to leaks in your unit.

Depending on the type of roof material such as rubber membrane or fiberglass, and the component it is sealed to such as a roof cap or antenna base, it’s extremely important to select the right sealant for each part of your unit. Certain types of RV sealants are best suited for specific jobs, and you should take care to choose the right type. So in this lesson, we introduce a variety of RV sealants, and teach you what products are ideal for which jobs.

Picking the proper sealant for your RV

Some RV manuals come with a chart that lays out which RV sealants satisfy the needs of each part of your unit. However, if you’re still unsure which sealant you should use on a certain component, we recommend avoiding a generic silicone sealant that can cause cracking and leaks in your unit. Instead, Dave Solberg introduces a range of RV sealants that you can utilize on your vehicle to properly adhere to that material for a long time to best keep moisture away.

Dave walks you through each of the most common sealants that are readily available at hardware stores, and explains what they’re best used for. He talks about a handful of RV sealants, including butyl tape for windows and roof and side vents, and discusses the proper way to use this handy, pliable sealant.

Typically, RV owners opt for silicone RV sealants for their ease of application. There are several options from which you can choose, including self-leveling joint sealant for vents, exterior siding and trim sealant that expands and shrinks to accommodate temperature changes, as well as thermoplastic sealant. Remember, it’s important that you don’t just settle for any generic sealant, but rather find the right sealant for the job required. Do your homework and, as always, consult the manual if you get stuck!

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10 Responses to “Choosing the Right RV Sealants for Your Vehicle”
    • Customer Service

      Hi, Milica. To provide more specific troubleshooting information we need to know the make, model, and year of your RV and what area you have seen some signs of moisture penetration? You state “My unit leaks and I don’t know where” however you must have some type of staining, delamination, or soft material that is visible? If you can provide more specific information we should be able to provide some steps for investigation.

  1. Joe

    It would be nice to have footnotes listing the type of sealant. The tubes were facing the speaker and not the camera.An audio presentation would have been the same.

  2. Diane

    Hi I had a leak in my truck camper and I have staining on my carpet , and the wood has damage what can I use to clean the carpet and fix the wood ?

    • Customer Service

      Hello Diane,

      Depending on the severity of the stain, I would recommend renting a carpet steam machine and a good industrial cleaner. They make some great portable models that are easier get in and out of campers. As for the wood, start with a wood bleach available at home improvement stores, although this will not “fix” the wood. If it’s deteriorated, you will need to replace it.

      David RVRC Video Membership

      We’d love to have you be a part of our community. We are convinced you will enjoy the benefits of becoming a member and having access to the best instructional how to videos and professional tips. We would like to offer you a special offer for your first year membership.

  3. Jan Larabee

    The screws have fallen out of the latch that holds the door open. There was no sealant installed with the screws from the previous owner. What can I use to ensure a tight fit for the screws to go back in? I am assuming some kind of a sealant. Right?

    • Customer Service

      Hello Jan,

      I’m assuming your are referring to a compartment door and probably what we called the “Chicken Beak” plastic or metal spring loaded latch? I would recommend a good quality silicone sealant that is outdoor quality and not affected by moisture. Fill the existing holes completely and put a little bead along the back side of the latch where it will touch the sidewall. You’ll be amazed at how tight silicone will bond!

      Hope this helps,
      David RVRC Video Membership

  4. MIKE

    suggesting silicone to be used on a rubber or TPO roof is just wrong . silicone is one of the worst things you could use , dicor or super flex . is what should be used along with eternabond tape


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