best rv caulk

9 Best RV Caulks Reviewed: Reviews & Buying Guide

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Longtime RVers know that water could do the worst kind of damage that could ever happen to their RV. This isn’t common knowledge, though, and new RVers doesn’t think too much of it. After all, it’s just water, right? What could it possibly do? Many of us learned the answer to that question the hard way. We would do anything to prevent even the smallest droplets from entering our vehicles.

Water damage was a big problem to RVers for years. Luckily, RV caulks were introduced to the market. With a good-quality caulk, you’ll never have to worry about blowing money on repairs for this problem ever again.  

A reliable caulk will preserve your RV’s good condition. It can keep every part of your RV dry by plugging the little holes and cracks that show up occasionally. Preventing any kind of damages by caulking seems exhausting but compared to how much more work it would take to repair the damage, it’s worth it.  

Of course, no shoe fits every wearer. What others might claim is good, might not work for you. So which one should you choose? Here are some recommendations along with reviews of the top caulks on the market. Read each of them and decide for yourself which one will work best for you and your RV.  

2019’s Best RV Caulks

3M Marine Adhesive Sealant

3M 5200FC 1 fl oz 06535 Marine Adhesive...
466 Reviews
3M 5200FC 1 fl oz 06535 Marine Adhesive...
  • CURES FAST - One part adhesive sealant requires no mixing, typically cures within 48 hours so you can get back on the water faster
  • USE WHAT THE PROS USE - Extremely strong adhesive sealant retains strength above or below waterline

You might have heard of this first sealant. It’s a very well-known tool among RVers. Its flexibility and its incredible strength make it one of the best sealants on the market today.  

This sealant boasts its permanence. It doesn’t easily wear off over time. It’s a marine grade adhesive that’s both strong and reliable. This sealant can fix any crack effectively and permanently.  

One of the best things about it is that it’s quick to dry. It takes half as much time as other sealants to solidify. Most sealants need 4 or more days to stick to the material. 3M only needs 2 days at most before it’s solid and ready to go.  

The result is very impressive. You can really see that the sealant stuck to the material. This sealant has been tested by its loyalists against storms, changing weather conditions, and even an earthquake. It’s really one of the best ones out there. You don’t have to worry about reapplying it for a while, this product has so far made good of its promise of permanence.  

Although you can still expect the change in size and volume that we have observed on many other sealants. Don’t worry, the seal would still be intact. Unlike most sealants, the 3M would still hold on to the material despite shrinking. That’s partly why it dominated the market when it came out. It has such as a strong binding power that even environmental forces that try to weaken it, failed.  

While this product is a great tool to fill slits and cracks, it’s not very effective at holes. It’s best if you just use it to bind materials together and fill in small cracks and little openings.  

What to like about it:  

  • Dried up and ready in 2 days  
  • Easy application  
  • Waterproof  
  • Permanent  

What you won’t like:  

  • Not as condensed as you might expect. It’s a little watery even in large amounts.  

EternaBond RSW-4-50 RoofSeal Sealant Tape

EternaBond RSW-4-50 RoofSeal Sealant Tape,...
1,901 Reviews
EternaBond RSW-4-50 RoofSeal Sealant Tape,...
  • Ideal for use in sunny environments
  • Simple installation only requires some surface preparation before use

This next one is not exactly a caulk. It’s actually a sealant tape, but it’s worth mentioning here anyway. If you’ve never used a sealant tape before, it’s really easy. You don’t need any kind of skill to apply it. That’s why it’s most recommended for beginners.  

Of course, you might be surprised that it even made the list. Well, this tape is special. It can match even the strongest caulks in terms of performance. It’s extremely sticky and leak proof. Many RVers can attest to its effectiveness in sealing cracks and slits.  

Another good thing about this tape is that it’s easy to apply. It’s a tape and could be applied as regular tape. Unlike the caulk that you need to load up into a caulk gun and takes days to dry up, sometimes even months. With tape, you can just cut it to little pieces and apply it directly. Massage it down with your fingers to make sure it really sticks to the RV, and then you’re done. There’s no waiting involved in this entire process. It’s a fast and convenient way to repair cracks, especially if you’re in a hurry.  

Of course, all things have their downsides. The tape is very visible when it’s already on the RV. If you’re very conscious about the appearance of your RV, then this might not be for you. You can clearly see where the tapes are, even if you’re a little far away. Another thing is that this product is not entirely weatherproof. It tends to melt away during heavy rainfall and storms. This is a huge let down considering the biggest purpose of getting it is to fix cracks and keep water out.

Despite all that, Is it still worth getting? Yes, definitely. It’s a great first aid for your vehicle. It’s a good repair tool for those times when you don’t have your caulk with you, and you need to seal off a crack. It can save your RV from incurring more damage.  

What to like about it:  

  • Easy to figure out and to use  
  • Can endure extremely hot temperatures  
  • Very stretchable  
  • Doesn’t need much application to cover a large crack, just spread it over and wait for it to level itself.  

What you won’t like:  

  • Too sticky. You can’t adjust it anymore once it made contact with the surface you’re sticking it to.  

Geocel 28100V Pro Flex Crystal Clear RV Flexible Sealant

Geocel GC28100 Pro Flex Rv Flexible Clear
132 Reviews
Geocel GC28100 Pro Flex Rv Flexible Clear
  • Crack resistant
  • Exceptional flexibility

If you’re heavy on appearances, then this sealant is for you. Its best feature is its flawless and almost unnoticeable finish. It’s best used when you’re going for a finish that looks brand new. It’s made by the manufacturer, Geocel, which is best known for sealants that have smooth finishes.  

You’ll have to be patient with this sealant. You’re not really going to see its great finish until it dries up. It’s recommended that you don’t do more than just apply it evenly on the crack. Don’t even spread it around. This sealant has a special self-leveling feature. It’s going to look even better if you don’t touch it and just let it take shape on its own. That way, It’ll look like a professional did it.  

The 28100V Pro Flex Crystal Clear is very versatile. You can use it to fix more than just your RV. You can also use it to repair other appliances.  

A big disadvantage to this product its price. This caulk costs much more than normal caulks. However, given the number of features it has and the peace of mind that it can give you, it’s very much worth it.  

Another disadvantage is that it can’t stick to every material. Don’t try to use it on polystyrene and rubber. It won’t stick to those surfaces. You can know more about its limitations and information through the manufacturer’s website.  

Check your roof before purchasing anything. This is a really great sealant but only for certain RVs. If the roof of your RV is fiberglass or metal, then this sealant would work really well with it.  

What to like about it:  

  • Not choosy on the material. Sticks to anything.  
  • Can be painted over.  
  • Easy application and has large coverage.  
  • Stretchable  

What you won’t like:  

  • It would cost you.  

Pro Flex Super Flexible Elastomeric Sealant

Pro Flex Super Flexible Elastomeric Sealant...
52 Reviews
Pro Flex Super Flexible Elastomeric Sealant...
  • Pro Flex Sealant is designed to out-perform polyurethanes and silicones without the inconvenience of extra preparation

This is one of the most impressive products on this list. It’s advertised to have a 50-year life span, which for a sealant is really awesome. It has the self-leveling feature that’s rare even for top sealants, and it’s very flexible.  

Although waiting for it to solidify, will take a while. In fact, it might take around two months before it’s finally done curing. It’ll be worth it though. The result will be very flawless. You can even paint over it to cover it up. Just don’t do anything more than applying the sealant. Let it level itself and expect it to have a tough finish once it dries up.

If there’s anything to hate about this product, it would be its odor. It has an extremely strong stench that could make your head hurt. Wear a mask while working with it to avoid directly inhaling it. If you can, take the RV to an open space before applying the sealant. If you do it indoors, the smell might stick to the room and linger.  

Of course, this is a small thing compared to its sealing capability. It’s one of the finest sealants that you can get for your vehicle. It’s strong, flexible, and best of all, paintable. It could really help give your RV a chance to look brand new again.  

What to like about it:  

  • Can stick to many types of materials.  
  • Can be painted over.  
  • Made specifically for RVs  
  • Stretchable  

What you won’t like:  

  • It takes a long time to solidify.  

Dicor 501LSW-1 Lap Sealant

This next one is from a well-known manufacturer. The brand Dicor has been around for a long time. It has established itself in the industry as a producer of great sealants. You shouldn’t have a hard time getting your hands on one of their products. They’re everywhere. Even small hardware stores have them.  

This sealant is packed with great features. It’s very versatile and would stick to almost any type of material. It’s been proven to work in vinyl, concrete, wood, fiberglass, and so many others. No matter what your RV is made of, this sealant wouldn’t have a problem working with it. Aside from that, it’s waterproof and watertight. It wouldn’t weaken or melt away with water, and it’s built to prevent a single droplet of water from seeping through the cracks. And unlike many of the sealants on this list, this one can even fix holes.

You can use it fix more than just your roof. This sealant can work with many other parts of your RV. You can use it to secure vents, screws, pipes, and all of your RV’s edges. Since this sealant is compatible with almost any material, there’re very little chances that you’ll encounter any problems while using it.   

Plus, it doesn’t yellow over time. This is a common problem among sealants. Luckily, this product doesn’t seem to have that same problem. It blends really well with whatever material it’s applied on. And it remains clear and transparent after many years without a single tinge of yellow on it.  

Another great and rare feature of this product is it’s resistance to UV rays. You don’t find that feature very often, even among top sealants on the market. With that, you can expect the seal on your RV to stay in good conditions for a long time.  

Sadly, this great product doesn’t have the self-leveling feature that’s found on many other sealants. You would have to manually spread the seal to cover the crack. This means that you’re not likely to achieve the perfectly smooth finish that other sealants can do.  

What to like about it:

  • Does not yellow over time.
  • Easy application.
  • Can stick to many types of materials.
  • Very effective in preventing leaks.

What you won’t like:

  • Does not have a smooth finish like other sealants.

Gray Tremco Vulkem 116 Polyurethane Sealant

Tremco 116 Vulkem Polyurethane...
23 Reviews
Tremco 116 Vulkem Polyurethane...
  • Quantity: 12 10.1 fluid ounce cartridges
  • Color: gray

The next sealant is mostly used for house renovations. It’s used by professional builders and interior designers to attach shelves, wall decorations, and other materials around the house. That should give you an idea just how strong this sealant is. It’s very versatile and can be applied to many things, even on the roof of your RV.  

This product comes with a case so you can conveniently carry it around with ease. It sticks to almost anything. You can use it to repair walls, small holes, masonry, ceilings, etc. It’s an effective tool to seal off every crack, slit, and a hole inside your house and in your RV.  

The Tremco Vulkem 116 is watertight. There’s no chance that water could seep through the covered hole or crack. The seal itself is waterproof and heatproof so it’s fine to leave it soaking in the sun or heavy rainfall.  

There are only two things that you could hate about this sealant. One is its unbearable smell. You need to wear a mask while working with it to be able to bear it The other thing is its stickiness. While this might seem like a good thing for a sealant, it’s not working out for this one. Because of that stickiness, this product doesn’t work with normal caulk guns. You would need to get yourself a special caulk gun with an automated air pressure to apply it.  

Still, it’s a great product. With the right gun, you can make that stickiness work for you. It’s a very effective sealant that won’t let you down.  

What to like about it:  

  • Can repair other things, not just RVs.  
  • UV resistant material.  
  • Can stick to many types of materials.  
  • Strong and stretchable.  

What you won’t like:  

  • Does not have a smooth finish like other sealants.  

Sashco 10016 Big Stretch Caulk

Sashco Big Stretch Acrylic Latex High...
269 Reviews
Sashco Big Stretch Acrylic Latex High...
  • Elastic - flexes with temperature changes and wind
  • Ultra-clear and stays clear - will not yellow over time

Here’s another sealant from a well-known manufacturer. The 10016 Big Stretch is manufactured by Sacho. Like many other products from this company, this sealant has the same great performance and flawless finish.  

This product is very easy to apply. It’s incredibly stretchable that you can just drag it out while it’s still hot to cover the entire crack. It also has the self-leveling feature, but you need to help it out a little by spreading it.  

This product is weatherproof. You can brave through storms and heavy rainfall without worrying about whether the seal will stay intact or not. Plus, it has an incredibly lengthy lifespan so you don’t need to think about replacing or reapplying it for a really long time.  

Just be prepared because this product solidifies fast. You need to move faster when spreading it around. Some people don’t really like this fast dry feature. They like their sealants to be very controllable. Even so, many RVers are perfectly okay with it, especially the really active ones. It’s easy to apply, and it won’t take them half a day before they can go back on the road and continue with their trip.

The biggest downside to this is its messy finish. This is to be expected given that the sealant has a weak self-leveling feature, and that it dries up really fast. You might need to clean it off and rub sandpaper on the excess caulk to smoothen it out.  

If you’re always on the go, then this one’s for you. With this quick-dry sealant, you don’t have to wait around for the seal to dry up. You can go back to the road almost immediately after you apply it.  

What to like about it:  

  • Can repair other things, not just RVs.  
  • Can also be used to secure the inside walls of the RV.  
  • Can stick to many types of materials.  
  • Strong and stretchable.  

What you won’t like:  

  • Not the best sealant for roofs.  

ToughGrade Self-Leveling RV Lap Sealant

ToughGrade Self-Leveling RV Lap Sealant for...
111 Reviews
ToughGrade Self-Leveling RV Lap Sealant for...
  • ToughSeal Self-Level Sealant
  • Seals along roof edges, around vent covers, vent pipes, air conditioners and screw heads.

This next sealant really lives up to its name. The ToughGrade Self-Leveling RV Lap specializes in sealing heavy-duty materials like aluminum and metal. You can use it to seal your RV’s roof no matter what material it’s made of. It’s not that hard to use. You can melt it with a normal caulk gun. The glue would come out smoothly and ooze out of the gun when you can apply it directly to cracks and slits.

This sealant also has a self-leveling feature but since the seal is very concentrated, you’d need to give it a little push. Help spread it around the crack before it solidifies. Don’t worry about using something rough to push it around with, it’s self-leveling feature would correct and smoothen that out. If you don’t feel like spreading it, just leave it alone overnight. The sealant would slowly reach the entirety to the crack.  

The ToughGrade Self-Leveling RV Lap is UV resistant. It will stay in tip-top shop even under the extreme heat of the sun. It’s also waterproof. It won’t melt away under extreme storms or heavy rainfall. You don’t have to worry about discoloration as well. This sealant doesn’t turn yellow after some time.  

Nothing’s perfect, even this sealant has a disadvantage. It doesn’t work well with rubber surfaces, although it’s advertised to be. It’s best to just use it on either metal or aluminum. It already has a record of producing great results with those two surfaces. Even their finish looks really polished. You can use it on all the metal surfaces on your RV.

What to like about it:  

  • Does not yellow over time.  
  • Self-leveling and permanent.  
  • Can stick to many types of materials.  
  • Great with any type of roofs.  

What you won’t like:  

  • A little expensive.  

Sashco 13010 Sashco Sealants Clear Lexel Adhesive Caulk

Sashco 13010 10.5oz Sashco Sealants Clear...
104 Reviews
Sashco 13010 10.5oz Sashco Sealants Clear...
  • Tough: Survives routine scrubbing with household cleaners, including abrasive cleaners.
  • Super elastic: When the surface moves, Lexel moves. No cracking, tearing, or pulling away for a lasting, permanent seal.

Here’s another one from the manufacturer Sacho. The 13010 Sashco Sealants Clear Lexel has all the great features that made its manufacturer famous in the industry. It’s one of the most durable sealants that you can find on the market.  

This sealant is mostly found in homes. It’s designed to be resistant to damage. When it’s dry, it’s almost impossible to tear or to break. That makes it perfect for repairing household items or for attaching items together.  

This sealant is damage resistant. It won’t be affected by scratches even if you scrub it really hard. It’s also waterproof. So don’t worry about it melting with the rain. It will stay in perfectly good shape even after storms or heavy rainfall. It’s also mold-proof. The sealant is made of materials that prevent molds from growing. No matter what happens, no mildew or molds will sprout on it.  

However, you need to be careful when handling this product. The product contains materials that are harmful to the body. As much as possible, avoid inhaling it. Make sure to work outdoors and in an open-air area. Additionally, buy a face mask to cover your mouth and your nose. If you can’t avoid using it indoors, open all the windows to let air in. Make sure that no one is around when you’re applying the sealant, especially little children.  

Aside from that, it’s good. This sealant is a reliable choice for the roof and exterior of your RV.  

What to like about it:  

  • Waterproof.  
  • Can be applied even to wet surfaces.  
  • Mold-proof.  
  • Damage-proof.  

What you won’t like:  

  • Not applicable to all types of surfaces, i.e. acrylic  

Factors to consider when buying RV Caulk

best rv caulk

Of course, there are other great caulks in the market than those in the list above. So, which one will work best with your RV? The list is just a suggestion of caulks that works best with different materials and different RVs. When picking which one would work best for you, here are some factors to consider. Keep them at the back of your mind and remember them when choosing a caulk for your vehicle.  

What are you sealing?  

Consider why you decided to get a caulk in the first place. Surely, you noticed a crack somewhere in your RV, and you wish to repair it. Go back to that crack or hole and examine it carefully. Think of the list and remember that some caulk doesn’t work well on holes. So if that’s a hole, you’d want to skim the list and find one that does. If it’s just a small crack, a simple caulk made of acrylic would do. If that’s a really bad crack, then choose one that’s more heavy-duty to repair it.  

What is your RV made of?  

Remember that most caulks don’t work well with every material. Check your material first then go back to the list and find one that would work with it. Top sealants seem to have a problem with rubber surfaces. Sadly, that’s what many RV roofs are made up of.  

If your material is very flexible, go for a rigid sealant. If the material is aluminum or fiberglass, find a sealant that works well with tubes like acrylics.  

Caulk Features  

The main thing to look for in a sealant is a waterproof feature. Those would dictate life or death for your seal. RVs are subjected to changing weather conditions and heavy rainfall all the time. If your seal is not waterproof, it wouldn’t last very long. It would melt away fast, and you’ll find yourself constantly having to reapply it to avoid leaks.  

Another major feature to look for is UV resistance. This feature is still rare, especially on sealants. But it’s important and it could help slow your RV’s deterioration.

UV resistance can help your seal stay effective for longer. It would also keep your seal intact even under the extreme heat of the sun. As long as your seal is UV resistant, you don’t have to worry about replacing it for a while.  

Damage resistant  

Damage resistance is an important factor in a sealant. It will dictate the lifespan of your seal. A good damage resistant seal is strong enough to withstand forces that could break or shatter it. Some of the items on the list above have this feature. It’s still a rare feature on a sealant so expect them to cost a little more than normal sealants.  


This feature refers to your seal’s ability to be moved without breaking. Don’t worry about durability when considering stretchability. Just because it feels softer, doesn’t mean that it’s weaker. Try to go for caulks that have this feature along with the damage-resistant feature.  


Of course the more the feature, the higher the price. When buying caulks, consider your budget. Sure, it’s a great feature-packed caulk but can you afford it? Some caulks are more expensive than others, especially the top brands. The list above includes brands with varying prices. Of course, you get what you pay for and the ones with the most impressive features, cost more. If you really want a good sealant, you need to be willing to shell out more money for it. Of course, it doesn’t mean that cheaper sealants aren’t that good. They won’t give you impressive results but if you’re really on a tight budget, they would do.

Things that you should know about RV caulk 

What’s a caulk and why does your RV need one?  

Not many people know how important caulks are to RVs. If you’re a beginner that has just started getting into RVing, listen up.  

RVs are taken everywhere. You subject them to the harshest weather conditions and the most extreme heat temperatures. Over time, it can’t be helped that your RV would incur at least a crack or two. From these cracks, water can come in and make the damage worst. The main point of getting a caulk is to seal these cracks before they can produce more damage.  

There are many different caulks on the market. Some of them specialize in one thing more than others. There’s a caulk that goes well with metals, one that works best with aluminum, and some who are capable of sticking even with rubbers. You need to choose one that will fit your RV.  

Some sealants have added features like UV resistance, Water tightness, stretchability, and extreme stickiness. These might seem like small things, but they’ll be good for your vehicle. These little features can help extend your RV’s life. If you can, find a caulk that’s equipped with them.   

Caulk types for RVs  

There are many caulk types on the market. When choosing a caulk, it’s best that you know the different types and what each of them is for. Here are some of the most common types of RV caulks you might encounter:  

Acrylic caulk  

The acrylic is the types that you’ll probably encounter the most. It’s the basic type of caulks, and it’s everywhere. It’s best used for small cracks, especially inside the house where it won’t be exposed to heavy rains. It works well with drywall and wood. It’s the cheapest type of caulk on the market, and that’s why it sells the most.  

Silicone caulk  

Silicone is also a pretty common type of caulk. They don’t really do well with RVs, but they’re mold-proof. That means there are zero chances of it growing mildews or molds. That’s a feature that you’d want on a seal on your RV.  

Adhesives caulk  

This caulk type is best used for putting fallen parts back to the RV. Adhesives are sticky, and they’re not choosy on the material. They would stick to practically anything. You can use them to glue two parts together or seal off cracks. They’re usually in tape form and applied the same way as regular tape.  

Vinyl caulk  

This caulk type is almost the same as acrylic caulks. The only difference is that they fare better outdoors. Vinyls are not the best material to use as sealants because they’re not that flexible, although, they’re not so bad either.  

Fireproof caulk  

As the name suggests, this caulk is fireproof. It really doesn’t do anything special except that the seal can’t catch fire. At the very least, you’re sure that the flames can’t enter through the little holes and slits. It still really doesn’t sound very safe, but you never know. It might still be useful in case of a fire.  

The downside to this is that the seal is colored red. It won’t blend with the color of your RV and would definitely attract attention.  

Now that you know the different kinds of caulks, you can choose which type would work best for you. Think about your RV, the material that it’s made of, and the weather conditions it usually face. Base your decision on the answers to all of these questions.

Why get RV caulk?  

Here are some of the things that caulk can protect your RV from:  


The main point of getting a seal for the cracks is to prevent water from getting into your RV. Leaks are problematic, especially during a storm or heavy rainfall. They won’t only get you wet. They will also blow up the damage by soaking everything inside the RV. If it gets bad enough, you might experience a little flooding inside your vehicle. Imagine going through all of this in the middle of a storm. This is why sealing is very important. It might seem like too much work, but it will help you avoid more inconveniences.  


RVers who are fond of hiking and camping in the wild are very familiar with molds. They know how fast those things grow and how hard it is to get rid of them. Plus, molds can be deadly when inhaled. As much as you can, kill any chances of molds thriving in your RV.  

Mildews and molds grow when water reaches a warm enclosed space. This is what will happen if water drips into the RV from little cracks and holes. They’ll grow molds and multiply. That’s why you should seal off the little cracks before any of this can happen. Not a single droplet of water should enter the RV from those little openings.  


Camping out in the wild come with mosquitos and bugs. That’s a given. If you’re inside your RV, this shouldn’t be a problem. Except if your RV has a few openings where they could go in. Instead of enjoying a piece of comfort in the wild, you’re going to be a feast for little critters that live there.  


Debris is another great reason why you should seal the cracks in your RV. They could enter through there and dirty the place. Small leaves, twigs, and sand brought by the wind will mess up your place and make it uncomfortable. You’ll be forced to spend more time, dusting them off instead of enjoying your trip. To avoid this, check your RV regularly and repair cracks the moment you see them.  

Resale Value  

Of course, who would want to buy a badly damaged RV? No one. If you want to put your vehicle in the market to buy another, better start taking care of it today. The more pristine it looks, the higher the value you can get for it. Don’t let cracks get bigger before doing something about them, fix them while they’re small and unnoticeable. If you can, go for sealants that leave a great, smooth, and flawless finish. You can also go for those that can be painted over to make it look brand new. They will cost you, but you’ll get it back when you sell the RV. Start taking care of that RV now, so you can sell it higher when the time comes.  

Now it’s time for you to inspect your RV. Are you sure there are no cracks that could let the things we just mentioned above, into your RV? Check twice and thrice. If you found one, repair it immediately no matter how small it may be.  


Will the silicone type that I have at home work for my RV?  

The short answer is no. While it seems like it can work, try to think long term. Silicone caulks, as we mentioned above, are not as good for RVs as adhesives or vinyls. Even if it does stick to your RV, it wouldn’t do much to protect it. You’re just sticking a temporary solution to a problem that in time could blow up to be bigger.  

Yes, it would cost you, but you’ll be thankful for it in the long run. Get an effective and high-quality sealant for your vehicle. Don’t try to save money by going for the cheaper option. Stick to the products we mentioned above or try to find one that’s somewhat close to those.  

Can I use the same RV caulk for other repairs?  

Yes, although there’s no guarantee that you’ll get the same good results. RV caulks are designed for RVs and using them for other things won’t guarantee good results.  

If you’re asking whether the same caulk can work for different RVs, then no. The caulk’s effectiveness depends per material. You can’t apply a caulk that’s good for metals on a Rubber surface. That won’t work, and the outcome would be a disaster. This is also why you shouldn’t use the RV caulk for other repairs. The materials might not match and if that happens, the results won’t be good. You’ll just end up wasting a caulk on nothing.  

How long should I expect the seal to last?  

This depends on how much you use the RV and what kind of sealant you have right now. Good caulks could last you a year or two even if you use your RV a lot. You won’t have to worry about reapplying them every now and then. This is a benefit of going for the best ones on the market, they last twice longer than the cheap ones. As much as you can, steer away from low quality sealants. They won’t even last you a month before you need to reapply them again.  

How do I caulk the roof of my RV?  

It’s very easy. Do the steps below:  

Wait for a calm weather before you work. Don’t work during a storm or while it’s raining. The sealant won’t latch onto the material properly.  

  1. Clean the RV, especially the areas where you’ll put the sealant.  
  2. Leave it alone to dry.  
  3. Mark your holes, slits, and cracks  
  4. Ready you caulk gun. Slice a small portion off the caulk’s end and then load it into the gun.  
  5. Apply it on cracks and spread them out.  
  6. Wait until it solidifies.  

Final word  

As an RVer, make sure that you’re prepared for anything that might happen on the road. Cracks and slits should be high on your priority to look out for whenever you’re on the road. You should always be ready to repair those cracks the first moment you see them on your RV.  

The best caulk will cost you, but they’ll save you even more money from repairs. That’s why it’s important that you invest in a really good one. Remember to take the factors listed here into account when deciding on which one to get. That way, you can be sure that whichever you choose, it’ll work really well with your RV.  

No caulk will work for every RV. Try not to depend on what other people say and just try to find one that works for you. If you’re not sure where to start trying things out, just choose one from the list above. They’re the best in the market. You can’t go wrong with them.   

If you liked this article then take a look at our list of must-have RV Accessories or recommended products page.

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