5 Best Caulk for RV Exterior 2021|All You Need to Know

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A caulk is suitable for sealing the gaps in the frame of the RV as well as in preventing leakage.

However, before you apply the caulk to the RV exterior, do make sure that you choose the right caulk for the RV exterior.


To help you with the same, we have compiled a list of the best caulk for RV exteriors. Along with that, we will share with you a buying guide so that you can choose the best caulk easily.

We will answer some common questions regarding caulks for RV exterior so that you can gain more information.

How To Choose Best caulk for RV exterior?
While comparing the best caulk for RV exteriors below, you should consider things like:

Composition:
Ideally, you should go with caulks consisting of silicone composition or non-hazardous composition. When that is the case, you will not have to worry about any toxins as well.

Color:
Most of the RV exteriors are white. That is why, if you choose the caulk with any other color, it might not go well with the aesthetics.

That is why you have to consider the color of the RV exterior and make sure that it is white. In that case, you will not have to worry about it going well with the exteriors.

Water resistant:
There is no point in choosing a caulk that is not water-resistant. Because if it is not water-resistant, sooner than later, it will develop a leakage. It is especially true in the rainy season.

Not only that, if it is not water-resistant, it can get washed away in 6 to 8 months as well. So in that case, you might have to reapply it again.

A much better alternative is to choose water-resistant caulk. Then, once you apply it, you won’t have to worry about monsoons, leakage, or the caulk being washed away.

Versatility:
Even though we are speaking about caulks only for RV exteriors, most of them are suitable for various purposes.

Ideally, you should choose a caulk which can be applied on walls, dry walls, RV roofs, shower area, and so on.

When you choose a caulk applicable over wide range of surfaces, you won’t have to worry about buying another caulk for other applications.

The more versatile the caulk, the better it is for you.

While comparing the caulks for RV exteriors on these 4 parameters, choosing the best one becomes easy.

Let us now look at the 5 best caulk for RV exteriors below.

  1. Gorilla 102048 100 Percent Silicone Sealant Caulk:

    The caulk which we are highlighting now comes in a pack of 6. The 100% silicone composition ensures that it dries quickly as well.

Also, this caulk can seal cracks as well as gaps. That is why; it is suitable for RV exterior surfaces as well.

It is suitable for indoor use as well. Not only that, it is 100% waterproof. That is why; it becomes easier for you to apply on the RV exterior.

Since it does not turn yellow or shrink, you can apply it to the exterior surface of the RV quite easily.

It is water-ready within 30 minutes, which allows you to use the RV in no time.

Not only that, it offers mold and mildew resistance which is another advantage.

With so many advantages, it is difficult for you to ignore this caulk for the RV exterior.

Pros:

Highly versatile
Mildew and mold resistant
Silicone composition
Quick to dry
Waterproof

Cons:

Not easy to paint over

  1. Dicor 501LSW-1 Epdm Self-Leveling Lap Sealant:

    The tube of caulk that we are highlighting now measures 10.3 ounces. It comes in a single tube, which means that you can do so without any worry if you want to buy it in a single quantity.

It is suitable as a sealant as well. You can use it not just on the RV exterior but also on windows, roofs, and so on.

It is compatible with the surface is like vinyl, aluminum, wood, fiberglass, and so on.

The white color means that it goes pretty well with the RV finish.

The self-leveling design ensures that you won’t struggle with its applications.

The UV stabilized design means that you won’t have to worry about discoloration or over a while.

Thus, if you want to buy a single tube of caulk, this one is certainly a great choice.

Pros:

Single tube available
UV stabilized design
Compatible with various surfaces
White color
Self-leveling design

Cons:

Takes time to dry

  1. Geocel 28101V Pro Flex White RV Flexible Sealant:

    The next option on our list is once again a caulk with white color.

The crack-resistant design ensures that you won’t have to worry about it developing cracks over time. Not only that, the white color means that it will amalgamate pretty well with the exterior of the RV.

You can buy it in a single tube of 10 ounces. That is why it is not necessary to buy it in large quantities.

The exceptional flexibility ensures that it goes very well with the exterior surface of the RV.

The excellent adhesion power means that it can stick to the surface pretty well. Also, it can stick to damp surfaces as well.

The UV-resistant design means that once you apply it, it will not get damaged.

The non-stringing formula can further make it easy for you to apply it.

Thus, when looking for a flexible sealant, you cannot go wrong with it.

Pros:

Crack-resistant design
Excellent flexibility
High adhesive power
UV resistant design
Easy to apply

Cons:

Packaging can be better

  1. Zollo RV Flex Repair Caulking Lap Sealant:

    Do you want to buy caulk for RV exterior in bulk?

If so, the option which we are highlighting now is a good choice for you.

It is suitable for not just the RV exterior but also for the RV roof as well.

The 100% silicone composition will not disappoint you.

You can apply it on wet or dry surfaces quite easily.

Not only that, it is available in white color, which goes pretty well with the surface of your RV.

It provides a watertight seal. That is why you won’t have to worry about leakage at all.

Additionally, it is eco-friendly and non-hazardous. That is why; it becomes effortless for you to use it.

You can easily paint over it after 24 hours. It means that you won’t have to wait for a long time to paint over it either.

The solvent-free design means that you won’t have to worry about any damage to the exterior of your RV as well.

With so many features, you cannot go wrong with it.

Pros:

Pack of 4
Watertight design
Eco-friendly design
Highly versatile
Can be painted over 24 hours

Cons:

Tube design can be better

  1. Class A Customs 1 Case of 12 Tubes RV Self Leveling Caulk:

    Many times, you might want to buy the caulk in bulk. If that is your requirement, this one is undoubtedly a good choice.

You can buy caulk in a 12 tube package.

The white color ensures that it goes pretty well with the exterior of your RV.

The self-leveling design means that it is suitable for RV exterior as well as the roof.

It is suitable for PVC rubber membrane, TPO, and so on.

The silicone base composition means that you won’t have to worry about it being washed away after some time.

You can use it not just on the RV but also on the air conditioner fittings, plumbing gaps, and so on.

Thus, you can go with this option when you want to buy caulk for RV exterior in bulk.

Pros:

Self-leveling design
Pack of 12
White color
Silicone-based composition

Cons:

Not available in smaller quantities

Thus, when looking for the best caulk for RV exterior, these are the 5 options to consider. We will now answer certain FAQs to help you understand more about these caulks.

FAQ:
How long does caulk for RV exterior last?
If you apply the caulk for RV exterior properly, it can easily last for 2 to 3 years. Assuming that you use the RV constantly, it can certainly last for 2 to 3 years.

Can you apply caulk for RV exterior on wet surfaces?
Yes, many caulks which we have highlighted above are suitable for application on wet surfaces as well. They might take longer to dry on wet surfaces, but they certainly work.

Final thoughts:
Thus, if you want to fill any cracks in the RV exterior, these caulks can come to your rescue. We have curated the list carefully to include only the caulks that work well on RV exteriors.

Instead of going through the specifications of the 5 options, you can directly go with the #1 option that is Gorilla 102048 100 Percent Silicone Sealant Caulk. The highly versatile design, silicone composition, and mildew-resistant composition make it a winner.