Best RV Sealant

Damage from the elements can be catastrophic and costly to any RV owner. One great way to protect yourself from this problem is by utilizing the best RV sealant. The ToughGrade Self-Leveling RV Lap Sealant is definitely at the top of the list, but several others exist today, which can work to protect your investment. Using this list, you’ll encounter several great choices for RV sealants. [Interesting read: best led replacement bulbs rv 921]


ToughGrade Self-Leveling RV Lap Sealant

When you’re looking at RV sealants, you want to focus on something that will last, look good, and do the job. The ToughGrade Self-Leveling RV Lap Sealant does all three with ease. It’s UV stabilized, which means it’s not going to break down from exposure to UV and it won’t discolor to some awful yellow over time. It’s best used around the vent covers, pipes, air conditioners, roof edges, and other horizontal surfaces.

As the product name suggests, it’s self-leveling, and it’s also possible to apply this product to a lot of different materials, specifically roofing materials. Of course, it has powerful water-resistant properties that will allow this sealant to do its job for a long time. [Interesting read: best rv battery dry camping]

Dicor 501 LSW-1 Lap Sealant

Dicor 501 LSW-1 Lap Sealant is another good candidate for the best RV sealant on the market today. This product can be used on all kinds of materials like mortar, wood, fiberglass, concrete, and more. It’s something you can put on EPDM or TPO, too. Like the ToughGrade, this product is perfect for withstanding a lot of time in the sun without degrading or staining.

The sealant is best used along a roof’s edges, screw heads, vent pipes, and other areas. Lastly, this product is easy to apply and even easier to find due to the Dicor brand’s popularity. [Interesting read: best solar panels for rv]

3M Marine Adhesive Sealant

If you’re looking for a sealant that will reach optimal strength quickly, you should consider the 3M Marine Adhesive Sealant. The 3M brand is very popular, so it should be easy to find this product in most stores, even big box hardware stores. Within five days, it’s completely cured and set to last. It resists damage even in the face of adverse weather, sunlight, movement, and more.

It’s designed to handle water, so it’s perfect for use on an RV and any boat. You want to be sure that you’re applying it to the right area because this stuff is tough to remove once it is set. [Interesting read: best electric heater rv]

GeoCel ProFlex RV Sealant

The GeoCel Proflex is another great option for sealants, even though it tends to be a little more expensive than others on this list. You can rest assured that this sealant will work on any surface that you can find in a typical RV. That includes times when those surfaces are damp, too.

It’s very flexible even after application, making it resistant to cracking after it’s applied. One thing that people love about this particular brand is that it’s very easy to apply, so even beginners can successfully put this on. Finally, you can paint over this sealant once it is set, and that can be great if you’re trying to get a unified look on your RV.

Sascho Clear Level Adhesive Caulk

As the subtitle on this product implies, it’s designed to stretch and resist physical damage. This is one of the most durable sealants that you’ll find on the market, and it has the added benefit of being incredibly inexpensive. That makes it a good routine and emergency sealant to have in your RV in the event of water leaking inside.

Not only can you use this on the exterior of the RV, but it can also be used on the interior as well. While it will adhere to most of the materials on typical RVs, it’s best when used on dry materials. You can expect to get a good hold out of this sealant. [Interesting read: best rv propane regulator]

Alpha Systems Self-Leveling RV Roof Sealant

The Alpha Systems Self-Leveling sealant is wonderful for RVs because it is specially formulated to work on the EDPM rubber roofs that are present on many of these vehicles. Since it is self-leveling, it’s best to use this on a flat surface so that it has a chance to cure and set completely.

The product works great for leaks or cracks with any of the vents on your RV or the pipes. It’s not great for vertical use, but it’s still very powerful and will resist vibration, sudden shocks, weather, and general stress. It’s a little more on the expensive side, but very useful. [Interesting read: best electric tankless water heater rv]

Dap Clear Silicone Sealant

The Dap Clear Silicone Sealant isn’t explicitly made just for your RV, but it can perform in the required manner. This product will give you perfect seals around vents, windows, doors, and more. It is both waterproof and weatherproof, too, so you don’t have to worry about it taking damage throughout the season.

The manufacturer has a lot of faith in the product, and they give you a long-term durability guarantee! Use this for ceramic, glass, wood, canvas, metals, plastics, and more, and you’ll have a powerful sealant. This is a good one to pick up if you can’t get to an RV supply store and have a sudden need. [Interesting read: best rv water hose]


Getting the best RV sealant can be the difference between having a usable seal and one that will last for years to come. There are many brands out there to consider. However, the best ones have been covered here, even if you aren’t near a regular RV supply store!