DIY Guide to Resealing Your RV Windows

Understanding the Importance of Properly Sealing Your RV Windows

As an RV enthusiast myself, I know how critical it is to maintain the integrity of your vehicle’s windows. Whether you’re embarking on a cross-country adventure or simply enjoying a weekend getaway, properly sealing your RV windows is essential for ensuring your comfort, safety, and the longevity of your rig.

You see, those windows aren’t just for show – they play a vital role in protecting you from the elements, regulating the temperature inside your RV, and even keeping pesky critters at bay. But over time, the sealant around those windows can degrade, leading to all sorts of problems. Leaks, drafts, and even structural damage can occur if you don’t address those issues promptly.

That’s why I’m here to guide you through the process of resealing your RV windows. It might seem like a daunting task, but trust me, with the right tools and a little elbow grease, you can have those windows sealed up tighter than a drum. And the best part? You’ll save a ton of money by doing it yourself instead of calling in the pros.

So, grab a cup of coffee, settle in, and let’s dive into the step-by-step process of resealing your RV windows. By the time we’re done, you’ll be a pro at this DIY project, and you’ll have the peace of mind knowing that your rig is ready to hit the open road.

Gathering the Necessary Supplies

Before we even think about breaking out the sealant, we need to make sure we have all the right tools and materials on hand. This isn’t the kind of project where you want to have to stop and run to the hardware store halfway through, am I right?

The first thing you’ll need is, of course, the sealant itself. Now, there are a lot of different types of sealants out there, and the one you choose will depend on the specific needs of your RV’s windows. Generally speaking, you’ll want to go with a high-quality, silicone-based sealant that’s designed for use in RVs and other outdoor applications. This stuff is tough, flexible, and can withstand the elements like a champ.

Next up, you’ll need a good quality caulking gun. Trust me, you don’t want to be trying to squeeze that sealant out by hand – your arms will be like jelly by the time you’re done. Look for a gun that’s comfortable to hold and has a smooth, even trigger action.

Now, let’s talk about the other essential tools you’ll need:
– Putty knife or scraper: For removing the old sealant
– Denatured alcohol or mineral spirits: For cleaning the window frames
– Rags or paper towels: For wiping up any messes
– Painter’s tape: To create clean, straight lines for your new sealant
– Scissors or utility knife: For cutting the sealant cartridge tip

Oh, and don’t forget a step stool or ladder if you’re working on taller windows. Safety first, my friends!

With all of those supplies gathered, you’ll be ready to tackle the real work – removing the old sealant and prepping the windows for their fresh new look.

Removing the Old Sealant

Alright, now that we’ve got all our ducks in a row, let’s get started on the fun part – removing the old sealant. This is where the real elbow grease comes into play, but trust me, it’s a crucial step if you want your new sealant to really stick.

First things first, you’ll want to use your putty knife or scraper to carefully peel away any loose or crumbling sealant around the window frame. Go slowly and be gentle – you don’t want to damage the frame or the window itself. Once you’ve got the bulk of the old stuff removed, you can move on to the next step.

Next, it’s time to break out the denatured alcohol or mineral spirits and give the window frame a good cleaning. This will help remove any residual sealant, grease, or other gunk that might be lingering. Just be sure to wipe the frame down thoroughly and let it dry completely before moving on.

Now, here’s where the painter’s tape comes in handy. Run a strip of tape along the edge of the window frame, creating a nice, clean line for your new sealant to adhere to. This will give you a professional-looking finish and help prevent any messy spills or drips.

Finally, it’s time to cut the tip of your sealant cartridge and load it into the caulking gun. Be careful not to cut the tip too wide – you want a nice, narrow bead of sealant for the best results.

Whew, that’s a lot of prep work, but trust me, it’s all worth it. Now that we’ve got the old sealant removed and the window frame prepped, we can move on to the really satisfying part – applying the new sealant.

Applying the New Sealant

Alright, folks, it’s time to get our hands dirty (or, at least, a little bit sealant-y). This is the part where the magic happens, and you turn those drafty, leaky windows into a fortress of RV perfection.

First, let’s talk about the technique. When it comes to applying the new sealant, you’ll want to work in smooth, even strokes. Start at one corner of the window frame and slowly work your way around, keeping the bead of sealant nice and consistent. Don’t be afraid to take your time and really work the sealant into any cracks or crevices.

As you’re applying the sealant, be sure to keep a close eye on the painter’s tape. You’ll want to remove it as soon as you’re done to ensure a crisp, clean line. And if you happen to get a little sealant on the window itself, don’t panic – just grab a rag and wipe it away before it dries.

Now, I know what you’re thinking – “But what if I mess it up? What if the sealant doesn’t stick or I end up with an uneven bead?” Hey, no need to worry, my friend. That’s why we did all that prep work earlier. As long as you’ve properly cleaned the frame and applied the sealant with a steady hand, you should be good to go.

And let’s not forget the most important part – let the sealant cure. Depending on the type you’ve chosen, it could take anywhere from 24 to 72 hours for the sealant to fully set. During that time, be sure to keep the windows closed and avoid touching the sealant as much as possible.

Once the curing process is complete, you can step back and admire your handiwork. Those windows should be looking better than ever, and you can rest easy knowing that you’ve taken a big step in maintaining the integrity of your beloved RV.

Troubleshooting Common Issues

Now, I know what you’re thinking – “This all sounds great, but what if something goes wrong?” Well, my friend, fear not. I’ve got your back when it comes to troubleshooting any issues that might come up during the resealing process.

Let’s start with the most common problem – leaks. If you’re still noticing water seeping in around the windows after you’ve applied the new sealant, there could be a few reasons why. Maybe you didn’t remove all of the old sealant, or perhaps you didn’t apply the new stuff thick enough. In either case, the solution is simple – just break out the caulking gun and reapply the sealant, this time making sure to fill in any gaps or cracks.

Another issue you might run into is cracking or peeling sealant. This can happen if the sealant wasn’t properly prepped or if it was applied in less-than-ideal weather conditions. If you start to notice the sealant losing its flexibility, don’t hesitate to remove it and start fresh. A little extra elbow grease now can save you a whole lot of headaches down the road.

And let’s not forget about those dreaded air leaks. If you’re still feeling a chill coming through the windows, even after resealing them, there might be an issue with the window frame itself. In that case, you may need to consider replacing the entire window unit. I know, I know, it’s not the news you wanted to hear, but trust me, it’s better to address the problem head-on than to try and band-aid it.

No matter what kind of issue you’re facing, the key is to stay calm, troubleshoot the problem, and don’t be afraid to ask for help if you need it. The team at is always here to lend a hand, so don’t hesitate to reach out if you get stuck.

Maintaining Your Newly Sealed Windows

Alright, folks, we’re almost at the finish line. You’ve done the hard work of removing the old sealant and applying the new stuff, and now it’s time to talk about maintaining those freshly sealed windows.

The good news is, with a little bit of TLC, those windows should stay in tip-top shape for years to come. But you can’t just set it and forget it, you know? Here are a few tips to keep your RV windows in pristine condition:

First and foremost, be sure to give those windows a good cleaning every few months. Use a mild, non-abrasive cleaner and a soft cloth to wipe away any dirt, grime, or debris that might have accumulated. This will help keep the sealant in good condition and prevent any premature deterioration.

Next, take a close look at the sealant itself. Keep an eye out for any cracks, peeling, or other signs of wear and tear. If you notice any issues, don’t hesitate to reapply a fresh coat of sealant. It’s a lot easier to do a quick touch-up than to let the problem get out of hand.

And let’s not forget about protecting your investment from the elements. When your RV is in storage or not in use, be sure to cover the windows with a breathable, UV-resistant cover. This will help prevent the sealant from breaking down due to sun exposure and extreme temperatures.

Finally, if you ever do need to remove the windows for any reason, be sure to carefully remove the sealant and re-apply it when you put the windows back in place. Rushing through this process can lead to all sorts of issues down the line.

By following these simple maintenance tips, you can rest assured that your RV windows will stay sealed up tight and looking their best for years to come. And who knows, maybe you’ll even inspire your fellow RV enthusiasts to take on this DIY project themselves!


Well, there you have it, folks – your comprehensive, step-by-step guide to resealing your RV windows. From gathering the necessary supplies to troubleshooting common issues, we’ve covered it all.

I know it might seem like a daunting task at first, but trust me, with a little bit of elbow grease and the right know-how, you can transform those drafty, leaky windows into a fortress of RV perfection. And the best part? You’ll save a ton of money by doing it yourself instead of calling in the pros.

So, what are you waiting for? Grab your caulking gun, put on your DIY hat, and let’s get to work. Your RV deserves the best, and with your newfound window-sealing skills, you can rest easy knowing that your rig is ready to hit the open road, come rain or shine.

If you ever run into any snags along the way, don’t forget that the team at is always here to lend a hand. We’re passionate about keeping RVs in top-notch condition, and we’d be more than happy to offer our expertise and guidance.

Until then, happy travels, my friends. And remember, the journey is just as important as the destination, especially when you’ve got a trusty, leak-free RV by your side.