The Best RV Caulks

Gaps and holes in your RV will invite different issues ranging from annoying noises from passing cars to water leaking through windows. You may be wondering – will typical silicone caulk work ok? Sealing these problems needs the best RV caulk.

The top-rated RV sealant helps make sure that you have a good night’s rest by keeping aggravating outside noises at bay. Further, an ideal RV seam sealer can help prevent pests, water damage, and nasty odors from seeping into your motorhome or travel trailer.

If you are having trouble looking for what caulk to use on RV, continue reading to know the best caulks for campers you can use today.

Best RV Caulk Reviews

1. Dicor 501LSW-1 Lap Sealant

One common issue of a low-quality sealant for RVs is durability. Thankfully, that is not the case with this Dicor RV caulk.

Unlike other RV caulks that tend to crack, this Dicor lap sealant secures gaps and spaces without a fissure in sight. Kindly note that one of the reasons why many caulks crack is extreme temperature swings. But this specific sealant from Dicor seems to handle freezing winter and hot summer weather quite well.

Additionally, it does not take long before this RV sealant caulk dries and hardens. I did not have to wait for extended periods to experience the optimal results provided by this product.

It is also quite versatile, seeing that I can use it on different crevices and gaps. I used it on my RV’s roof, windows, and other fissures that may need sealing. I should also mention that it is compatible on different surfaces, including aluminum, wood, fiberglass, concrete, and galvanized metal.

I like the white color as it blends well with my camper’s décor. It pairs well with the windows on my rig, and the contrasting colors on the vehicle’s rubber roof adds an aesthetic touch.

2. Gorilla White 8060002 Silicone Sealant

Before, I had to use sealants that take more than a day to dry. Enter this product, which dries in just about 30 minutes. Although it is not completely dry after that period, it can already resist a significant amount of dampness.

Aside from this RV caulk being a quick-drying solution to sealing gaps and seams, it is also reasonably flexible. Its applications dwell more than closing cracks and holes in rig exteriors. I can also use this substance on other surfaces, such as RV windows, metal gutters, and kitchen counters.

This sealant is usable for different marine and recreational vehicles. Still, this silicone caulk might be better if it were mold and mildew resistant, so boat owners should take extra precautions in using this product on their vessels.

Additionally, it does not turn yellow when exposed to significant amounts of oxygen. Thus, it is no longer a requirement to paint over the seal to hide the yellowing. I should also mention that this RV-sealing formula does not shrink or crack, which would otherwise be common concerns in low-quality caulks.

Cleanup is quite easy, unlike other similar products that tend to leave significant messes after applications. All it took was to wipe off the excess with a clean towel before it starts to dry.

3. Geocel 28101V RV Sealant Caulk

Motorhome owners know too well that water damage can become a serious issue. Prevent that concern from wreaking havoc with this RV window caulk. This product is one of the best, and perhaps the best sealant for RV windows because of its characteristics and features.

In my experience, it would seem that this RV-sealing solution is highly resistant to cracking. Therefore, I can have peace of mind, knowing that water will not enter my vehicle’s windows, even when it is raining cats and dogs outside.

It is also quite surprising yet astounding to see this solution’s flexibility in action. I can still make fine adjustments to the seal, even after the Geocel Proflex RV sealant is already dry. That way, I do not have to remove the sealant to make corrections, which would otherwise be a painstaking process.

Not only is this product great for motorhome windows, but it is also excellent for sealing other surfaces. For instance, this solution can also be an RV roof sealant. Thus, I can stop water from leaking from my camper’s roof during downpours. This sealing formula also adheres well to different materials, such as aluminum, wood, and fiberglass.

4. Kohree HY0415-HM Seal Tape

Sometimes I do not have the time to wait for an RV caulk from a tube to dry. Thankfully, products like this seal type exist.

Perhaps the main draw of this RV-sealing solution is its ease of use. It is, by far, one of the easiest ways to seal crevices and gaps on my motorhome. All it takes is to pull a section of the tape and apply it to the offending location. Thus, it does not take more than a few moments to complete the application.

Aside from its top-notch convenience, this product promotes a water-tight seal to RV roofs and windows. It does a reasonably good job in preventing rainwater from seeping through holes and gaps, which would otherwise lead to water damage to appliances and surfaces in the camper.

Plus, its flexibility allows it to be usable on relatively every surface. It does not seem to harm materials like glass, concrete, marble, metal, vinyl, rubber, and EPDM.

One slight shortcoming I found with this sealing tape is its girth. I would prefer it to be wider to help seal broad gaps. But I can still apply multiple tapes on large fissures if needed.

5. Sikaflex-221 017-90891 Sealant

It has been an enjoyable experience working with this RV caulk because it is quite the workhorse.

The first of its many likable features is the high elasticity. Unlike other competing products, particularly low-quality variants, this adhesive and sealant for campers allows me to seal a reasonably broad or lengthy gap without using a significant solution amount.

It is also possible to use this sealant for motorhomes on other crevices and gaps than RV windows and doors. It is an RV caulk for vertical surfaces, such as cracks appearing on countertops. This product is also a caulk for RV shower, as it is usable on different surfaces such as metals, ceramics, and even plastics.

As for its seal, it is nothing short of durable. The weather-resistant toughness gives me peace of mind, knowing that extreme temperatures will not cause the seal to crack or distort.

Additionally, I am pleased to mention that it is possible to sand or paint over this seal. Thus, I can hide it from view through sanding and painting, especially if the product’s color does not match its surroundings.

6. Ziollo RV Flex Repair Caulk

Many RV caulks are ideal for sealing camper windows and roofs. But this product takes its applications to another level, thanks to its first-rate versatility.

Aside from using it on conventional surfaces, it is possible to use this RV caulk on other materials. I used it during the installation of a solar panel installation on my motorhome, specifically on the wires and drill points without noticeable adverse effects.

Its versatility does not end there since I used this caulk for motorhomes on other materials. This sealant’s compatibility is among the best as it is usable on metal, aluminum, wood, concrete, fiberglass, and EPDM surfaces.

I should mention that this solution seems to take longer than others to dry. But the caulk is already water-tight within a few hours after application, albeit it is still quite squishy during this period.

Furthermore, I am quite pleased, knowing that this solution comes from biodegradable products. So I will not harm the environment if I cannot use the entire tube when the contents expire.

7. Premier Pro RV Roof Sealant

Top-notch versatility comes in a reasonably-priced package with this RV caulk. Although it is slightly more expensive than other variants, especially those that come in tubes, this option offers more content. After all, you cannot go wrong with 750ml. of caulk for RVs, particularly when comparing this product with 10 oz. options.

Aside from it being economical, this caulk presents its users with various applications. Perhaps it is safe to say that it is an RV roof caulk at heart. However, it is also possible to use it on other applications, such as RV air vents, windows, doors, and gutters.

Its versatility does not stop there since it is possible to use this sealant on asphalt, metal, rubber, and wood. Therefore, I no longer have to go purchase multiple caulks to help me seal gaps in different materials.

Moving forward, this sealant is also reasonably straightforward to apply. Kindly note that it becomes easier than usual to apply this product with a caulk gun. But it is still sufficiently easy to apply even without the use of that specific tool.

8. 3M 08027 Grade Silicone Sealant

Make no mistake as this sealant can close fissures and gaps from different surfaces other than those in marine vessels. Although the manufacturer develops this product for boats and other aquatic vehicles, it is usable on different motorhomes.

This silicone sealant can withstand harsh wet environments. It comes formulated with a high-temperature resistance rating to prevent issues like cracks and adhesive loss. Furthermore, its water-resistant properties mean it is also resilient to mold and mildew growth.

Also, it is reasonably tough and flexible even when wet. Thus, I can give my camper a rinse without worrying about this sealing solution falling off of surfaces.

This RV caulk also works on different materials, like metal, glass, and fiberglass. It is also safe to use over painted graphics. To give readers an idea of this product’s versatility, I used it on surfaces like headlights, dashboard components, and electrical hatches without noticeable signs of damage.

Unlike other caulks, this marine adhesive sealant does not require mixing. I can use it straight out of its container, which means this product is reasonably friendly for beginners. Please note that it is possible to use it with a caulk gun for easier applications. But using it without that tool is not a requirement as the sealant does a fairly good job in not making a mess.

9. RecPro 1021 RV Sealant

This is perhaps the best caulk for fiberglass RV I used in a while. It seals and adheres to that specific material like glue, creating tight and reliable seals.

Aside from being a fine RV caulk for fiberglass, its versatility allows me to use it on other materials. It seals cracks on metal vents, stainless steel screws, and even the areas around RV air conditioners.

This solution’s all-weather resistance is also one of the best, if not the best on the market. It does well in resisting serious weather conditions, such as the summer heat and freezing winter. Plus, it held well under heavy downpours.

Further, the product’s temperature rating states that it can withstand temperatures from -65 to 250 degrees Fahrenheit. I put this trait to the test by applying a small amount to my rig’s engine. Surprisingly, this caulk did not encounter any significant issues.

This sealant also dries white, which means it blends well with many interior RV décor. It has also been many weeks since my last application of this product, and it still looks white since that time.

10. E-SDS RVTAPE01 RV Sealant Tape

I have been looking for an RV sealant that allows me to ‘place it and leave it.’ That search led me to this roof caulk tape.

Once applied, the seal does not move an inch. The closure is as satisfying as it can get since water and other external forces and substances will not enter the sealed area, especially when applied over edges. In perspective, water, snow, and bugs will not enter enclosed locations.

A word of caution – since the seal is quite sturdy, there might not be much room for errors. In other words, once I applied the sealant, the adhesive is strong enough to last for weeks and perhaps even months. I might even go as far as to say that the seal may last many years.

Hence, RV owners, such as myself, should be wary about applying this RV-sealing tape because it has a reasonably straightforward application process. The steps are quite simple as I only needed to clean the surface and apply the tape. The package even comes with a rubber roller to help adhere the tape better.

11. Flex Shot 30802-2 Sealant Caulk

I became interested in this product after seeing it on TV and most, if not all of the features and traits are reasonably close or the same as advertised.

First, the first-rate allows me to use this sealing solution on virtually any surface. Using it on rubber, fiberglass, and metal did not create significant issues if any.

Also, a caulking gun is not a requirement to apply the seal. The container should suffice in most applications in applying the solution to most gaps, holes, and seams. Furthermore, it does not leave any messes, which makes post-application cleanup a breeze.

Additionally, this sealing formula will expand and contract, but these traits are not adverse aspects for this specific product. Instead, the caulk will adhere and conform to the surface, creating a near-perfect bond with materials and their shapes. In turn, it prevents objects and external factors from entering or escaping gaps and seams.

The solution does not also crack or shrink. It has been weeks since I used this product, and its appearance and functionality relatively stays the same since the initial application.

12. Red Devil Industrial 06970I Sealant

The efficacy of this rubber sealant is as astounding as it gets. It is a super-sticky substance that quickly adheres to almost anything it touches. Cracks, seals, and holes tend to disappear within moments during the application.

However, this sealing substance tends to be stickier than others. I should warn users to wear gloves. Otherwise, removing the rubber caulk residue from the skin can become a ‘sticky’ situation.

This product is also reasonably durable, I left my camper outdoors for a few days as the vehicle came across weather like the hot summer sun and sudden downpours. Then, I checked the condition of the seals after that period. Thankfully, it withstood harsh weather without signs of cracking or other noticeable issues.

Convenience in cleaning is also one of this substance’s appealing qualities. I only used a clean cloth with 93% isopropyl alcohol. The excess caulk disappeared within a few wipes, promoting an aesthetic yet still functional enclosure to gaps and seams.

13. ToughGrade Self-Leveling RV Lap Sealant

It used to take several hours to seal cracks, seams, and gaps in a 19-ft. trailer. Now, it only takes a few hours, thanks to this product.

To put that task into perspective, I used this substance on different materials and surfaces. Some of those things include vent covers, pipes, and screw heads.

I also like to emphasize that I used four of the containers that came with the single purchase to cover the travel trailer. It might be more expensive than buying a single caulk container, but it was an economical choice for relatively large jobs.

This sealing formula also adheres to different substances, such as aluminum, concrete, and galvanized metal. It also maintains the object’s flexibility and function. For example, I can still use the screws without messing up the seal significantly.

But if I do mess it up, it is fairly easy to reapply and fix. The container is compatible with a standard caulk gun. However, this tool is not a requirement since I can still use the tube in applying the sealant.

I should also mention that this specific formula runs. Therefore, it may not be a good fit for vertical surfaces. Still, it adheres and conforms to the size and shape of most horizontal surfaces.

14. Sashco 14010 Roof Sealant

The last product on this list of the best RV caulks is this product from Sashco. But do not consider this item to be a low-quality sealant because it has traits that might not be present in many other competing products.

For instance, this specific caulk for campers can stick to wet surfaces. In contrast, many RV caulks should not be used on damp surfaces, or else the seal will not stick properly. Therefore, I can apply this sealant during the cold and wet seasons without worry.

This water-resistant nature also makes this product an ideal choice for sealing gaps, holes, and seams during winter. Other products, on the other hand, tend to be quite unusable because of the significantly cold temperatures. Thankfully, this product does not give me those problems, thanks to its elastic low-VOC formula.

Plus, the tight seal and water-resistant properties work together in reducing the risks of water damage. Heavy downpours remain outside the vehicle so my camper’s cabin remains completely dry from rainy weather.

However, this product will not only keep water outside as it can also help resist significantly hot temperatures. The hot summer sun and harsh UV rays do not seem to harm the seal’s structural integrity, reducing the risks of cracking.

What To Know Before Buying RV Caulk

Part of the shopping experience in buying an ideal caulk for motorhomes is familiarizing ourselves with some essential factors. Searching for the best RV caulking tips online will give you the information you need. Thankfully, you are here right now so you do not need to scour the market for those important elements.

Some of the vital aspects to consider when shopping for RV caulk are:

Budget

Ask yourself this question – How much are you willing to spend? It might be an unwise decision to buy an RV sealant with a price tag exceeding your allotted spending allowance. Make sure that the product is within your budget so you have extra cash for other RV essential items.

Resistance

Is the RV caulk waterproof? Is it resistant to potential cracks from harsh UV rays?

Caulk with high resistance to different elemental factors tends to be a must-have for any camper owner. That way, you will not worry since the seal will stay sturdy, regardless of the current weather.

Ease of Use

Do you want to spend the entire weekend sealing cracks on your RV? Probably not.

The caulk you buy needs to be reasonably straightforward to apply. It will offer less effort during the application process, which should give you more time for other tasks.

The Different Types of RV Caulk

It can be quite confusing to browse for the right RV caulk because of the plethora of options on the market. But you can make your decision-making process easier by understanding the different types of RV caulks.

Painter’s Caulk

Also called acrylic latex caulk, or acrylic caulk, this type of sealant tends to be the most affordable choice out of the group. It can cover small cracks and holes, and most variants allow users to paint over the seal.

Vinyl Latex

Convenience tends to be the main draw for vinyl caulks. The excellent ease of use makes this type suitable for indoor and outdoor applications. However, vinyl latex tends to be inflexible, which may cause issues for areas that contract and expand.

Silicone

Silicone caulks tend to be highly resistant to water damage. Thus, choose this model if you want to seal cracks and holes in RV showers and other water damage-prone locations.

Camper vehicle owners may need the help of an RV sealant chart to check the correct types of RV caulks for their specific needs.

Benefits and Drawbacks of RV Caulk

The different RV caulks on the market generally hold varying advantages and shortcomings. Still, many top-notch options tend to possess similar benefits and drawbacks.

The Benefits of RV Caulks

• Promotes a watertight seal around joints to prevent water leaks
• Prevents hot and cold air from escaping, lowering energy costs
• Protects indoor RV décor from potential damage from the elements
• Reduces outside noise for comfier indoor settings in motorhomes
• Many reasonably-priced options for different budget constraints

The Drawbacks of RV Caulks

• Might not be flexible
• Might not be suitable for vertical applications
• Might crack under extreme temperatures
• Might not allow users to paint over the seal
• Might have more expensive prices than competing products

What Is The Best Brand Of RV Caulk

Many brands offer first-rate RV caulks to their customers. But some companies tend to stand out from the rest of the crowd for reasons like better customer service and more superior product lines.

Two of these noteworthy motorhome caulk businesses are:

Dicor

A manufacturer of roof, wheel, and RV care products, Dicor is one of the leading camper sealant manufacturers in the industry. Started in 1984, this company still holds strong, thanks to its diverse product offering and an adaptable mindset to compete with other players in the sector.

Kohree

Although many know Kohree as one a maker of hunting lights, this brand also sells excellent RV and trailer maintenance products. This company is still relatively new as it started its operations in 2009. Nonetheless, its top-notch products make it a prime choice for many buyers of RV sealants.

How Do RV Caulks Work

Caulks for motorhomes are adhesive substances. These are sealing solutions that help plug up cracks, crevices, gaps, and holes. At first, the substance tends to be soft and tacky and will dry and harden over time. The best caulks for RVs tend generally last for years, even when exposed to extreme weather.

What Type Of Caulk To Use On Camper

The answer to that question is, ‘It depends.’ You need to consider the essential factors before buying an appropriate motorhome sealant. Then, you may want to check the types of gaps or holes to fill.

For example, consider using an RV trim sealant if cracks or deep scratches exist on your camper’s trims. Conversely, think about using a silicone caulk for sealing unwanted crevices and holes in RV showers.

What Do You Seal RV Windows

Kindly note that you do not need to restrict yourself to one specific type of RV sealant to close cracks, holes, or gaps in your rig’s windows. Searching for the best caulk for your rig is critical to significantly reduce the risks of potential damages.

However, keep in mind that not every caulk on the market works well with RV windows. You should read online RV caulk reviews first, like the list in this article, before proceeding with your purchase. After all, you do not want to waste money buying the wrong sealing solution.

How Do You Seal RV Seams

Water damage, ruination from significant UV exposure, and noise pollution – these issues are some of the few concerns experienced by many RV owners because of the existence of large gaps in their rigs.

Thankfully, you have the option to use high-quality seals to help close gaps and seams. But failure to follow the recommended procedure might lead to more concerns than intended.

First, make sure to schedule your RV-sealing day. Check the weather forecast for your chosen day as caulking your rig on a particularly damp day may lead to poor results. Make sure that the day is quite dry as it may help hasten the drying process.

Next, wash your rig to help eliminate dead bugs and road grime. Accidentally using sealant over filth may loosen the seal, leading to poor closures.

You may also need to remove old caulking before applying a fresh batch. If so, use a reasonably sharp razor or knife to scrape off the substance. Make sure to use the sharp edge carefully. Otherwise, you might leave scratches on your camper.

Once you remove the old caulking, it is time to apply a fresh sealant to your RV’s seams. At this point, you can use either the container that the caulk came with to apply the substance or a caulking gun.

Caulk a bead along the first seam. It should be about four to six inches long. Then, take a cup and fill it with regular or soapy water. Dip two of your fingers and run them along with the caulking’s bead. This process will help smoothen the solution, which may aid in creating an even seam. Continue applying beads and running your damp figures to the other seams in your rig.

Finally, wait for the sealant to dry. Please note that some caulks may take more than a few hours to dry completely. Certain variants may even take more than 24 hours to dry.

Where Can I Buy RV Caulk

Finding the right place to buy the ideal RV caulk is as important as purchasing the product itself. After all, perhaps the last thing you would want is to purchase from an illegitimate retailer.

With that in mind, you have two options when buying RV caulks: offline or online.

Offline Shopping

Choose from a range of local stores that might exist in your area. Some popular examples may include Home Depot, lowe’s, and Walmart. You might also encounter some hardware stores selling top-notch caulks for motorhomes.

Online Shopping

Shopping from the comforts of home is a convenient way to look for first-rate sealants for camper trailers. Go on the Internet to find reputable online sellers, but make sure you are using the right keywords. For example, use keywords like ‘where to buy Dicor sealant,’ ‘Lexel caulk for RV,’ or ‘Lexel adhesive caulk’ to help refine your search.

Conclusion

Now that you are at the end of this article, you should have a better understanding of shopping for the best RV caulk. Remember to ensure that the ideal RV sealant has first-rate traits like ease of use, durability, flexibility, and versatility. A waterproof seal is also a nice feature you should be looking for in an RV caulk.

Still, if you would like to base your decision on my suggestion, consider buying the repair caulk from Ziollo. This option promotes top-notch versatility while providing outstanding seals to cracks, gaps, holes, and seams. Plus, you cannot go wrong with a lifetime warranty and guarantee from the manufacturer.

Philip Lopez

Okay, so I’m Philip Lopez. I join Riverside Trailer as an editor, where I will be doing research for both content and reviews. I contribute to studies aimed at understanding the most typical problems encountered by RVers on the road. I also keep up with the newest RVing gadget innovations so that I can promptly evaluate and recommend the best options.