Routinely maintaining your RV is the best way to keep your coach looking and operating properly. While RV are made to last and act as a second home, they will usually require extensive amounts of work throughout the years. It would be nice if they were built similarly to the exteriors of waterproofed busses, but that would make RVs much more expensive. RV sealants, however, are a great way to waterproof and seal the exterior of your coach. Below, we’ll discuss some of our favorite RV sealants.
Coach Specialists Favorite RV Sealants
- Geocel 28100V ProFlex RV
- Dicor 501LSW-1 Lap Sealant
- Tremco Vulkem 116
These are our top 5 choices for RV sealants. We want to make sure you’re getting the best RV products out there to keep your coach in as best shape as possible.
Frequently Asked Questions
At Coach Specialists, we so often get asked:
Why can’t I use regular caulk I have under my kitchen sink somewhere? The problem with using just regular household caulks is that they are usually silicone based. This type of caulk is the most common and is typically used for your kitchens and bathrooms because it gets very hard. This makes it terrible to use on RVs. RV sealants need to be able to withstand the harsh climates and environments out on the road. Silicone caulks are also much harder to be removed and you can’t re-caulk over them. This makes it harder and more tedious to repair RV sealants.
Can I use the sealant through the entire RV? Most RV sealants are designed to be used on multiple surfaces, but not all. The sealants you need will go on roofs, windows, walls, A/C cutouts, and more that require waterproofing.
How expensive are RV sealants? Not all RV sealants are created equal. This means they don’t all cost the same. Usually, however, they’re not too expensive and most are found online with great deals. One thing that can raise the cost of RV sealants is going the DIY route. Not everyone knows how to properly seal RV seams or other areas to keep things safe. Constantly needing to redo seals or buy more RV sealants can get costly.
Our Top Picks for RV Sealants
Geocel 28100V ProFlex RV
Probably the most well-known RV sealant is the Geocel 28100V Proflex – more commonly known as just, Proflex. A sealant that comes in a variety of different finishes, ProFlex consists of a flexible polyurethane sealant. You can find it with a clear, white, black, almond, or bright white finish. It works great on horizontal structure such as roofs and on verticals like windows. It works well withstanding different environments and temperature changes RVs often experience. This product can typically be found for around $10 to $15.
- Crack Resistant
- Resealable in the future (does not require removal)
- Mildew Resistant
- Dirt Resistant
- Will not work on synthetic rubber
Dicor 501LSW-1 Lap Sealant
The Dicor 501LSW – 1 Lap Sealant is one of the most popular sealants for RV exteriors, especially roofs. Amazon has rated it a top seller among similar products. We love this product as it has a very thick consistency and will not harden immediately but will remain flexible, hence the “lap” in its name. You can typically find this product for sale for $10 to $15.
- Works on multiple surfaces including aluminum, vinyl, wood, mortar and concrete.
- Great match for EPDM sheets commonly found on RVs
- Will not stain or discolor existing RV surfaces
- Holds up against UV rays
- Perfect for sealing RV roofs
- Does not work on vertical sealings such as windows, doors, etc.
- Uses distillates
Tremco Vulkem 116
Tremco made our list as it is a very affordable product should you be buying multiple containers. Tremco isn’t exactly made for RVs specifically but it works great for the exterior of your coach. We love it for window sealants as it gives ones of the tightest seals out there. It’s also a very versatile product. Amazon currently lists this product on sale for $8 or less.
- Super affordable
- Can be stained or painted to match other RV surfaces
- Mildew resistant
- Permanently flexible
- Cannot be used on synthetic rubber
- Only comes in one finish – texture, gray finish
ToughGrade made our list because it is self-leveling. It’s great for not only roofs, but can be used on vent pipes, the air conditioner, and even screws. ToughGrade is a very flexible sealant and can be used on top of a variety of different materials including: wood, concrete, aluminum, and vinyl. ToughGrade is a little more expensive than most with a 4-pack being sold online for $35.
- Versatile on different materials
- Prevents discoloration and deterioration
- Will not stain
- Remains flexible
- Last 5 years or more without cracking
- Definitely pricey
This Sashco RV sealant rounds out our list because it will definitely give you the most bang for your buck. This sealant works wonderful for completely sealing your RVs roof. It was specifically made for RV use. One of the greatest things about Sashco is that it can be applied to wet surfaces. This is great if you are trying to seal a leak while being able to see where the leak is. It can also stick to a number of different materials like concrete, wood, plastic, asphalt, and even metal. It is very flexible with no risk of freezing either. Sashco can be found on amazon for around $10.
- Super simple to apply
- Clear finish
- Will not yellow or discolor
- Mildew Resistant
- Water Resistant
- Long drying time (users report up to five days for coats)
Using RV Sealants
As mentioned, going the DIY route is a bad choice, but it can cause its own problems. If you are going to self-seal your RV, we recommend buying containers in bulk in case there is a mishap. You should also use caution when starting the process. Since many of these caulks don’t work well with certain materials, map out where exactly the product needs to go. Make sure everything is cleaned and dried before application as well. Only cute off small holes in the tips as some of the products can be difficult to control.
If you aren’t comfortable going the DIY route, we can help! At Coach Specialists, we have a team of dedicated RV repair technicians and the best RV sealants around. Any of our locations are fitted with the tools and people necessary to get your RV all sealed up and back out on the road. If you would like to learn more about RV sealants, or need your RV sealed, reach out! We’d love to take a look.