Water proof sealant

That is exactly what I plan to do. I have a roll of Butyl tape on the way from Amazon and I already have two tubes of ProFlex.

I thought that butyl tape was a common item. I could not find it at either Home Depot or Menards. Menards had some but it was not nearly the size I needed. Is it only available at RV dealers? I thought it was a fairly commonly used product that would be available at most home stores.

donn0128 wrote:
If this is a clamp of flush window? The butyl seal on clamp windows csn fail. Before wasting time slathering sealant all over the window, take it out, clean everything throroughly, go buy a roll of butyl putty tape. Apply all around the window, reinstal. Clean excess squeeze out, now, apply a small bead of Dicor around the top and sides of the window. Now you have a professional, permanent fix.

exactly. don't do a band aid by putting something around the outside. First find out why it leaked, correct it and install properly which will in almost all cases mean some kind of butyl tape, then and only then use a caulk around the outside.

Thanks Barney for the photo edit and reclass on the forum reclassification.

Moved to Tech Issues forum from DIY.

Update, the leak returned. We were out this weekend and it rained all day saturday into sunday and by the afternoon on Saturday, I once again noticed the slight drip, drip, drip out from under the window over the sink, down the wall onto the counter top. I just kept a rag under it until we left and when I got home, I got up on a tall bucket and looked along the top of the window, there is clearly a breach in the seal. I will be pulling the window and re-doing the seal and replacing the window this week sometime. I really hope this is the final solution. Water leaks stress me out.

I guess I could just patch that spot with some sealant, but I would rather pull the whole window and redo the entire seal and make sure it is done right.

What do you guys think:

Moderator edit to re-size picture to forum limit of 640px maximum width.

esox07 wrote:
I have seen a lot of posts that advised specifically against using silicone to seal trailers. And that is why they make specific stuff just for RV's. It could just be a marketing ploy to charge $10 for a tube of sealant instead of $3, but most of the online stuff suggests otherwise.

One of the biggest issues with silicone is that nothing, including silicone, will stick to it. When you need to reseal what will eventually need to be resealed you're in for a rough job.

I have seen a lot of posts that advised specifically against using silicone to seal trailers. And that is why they make specific stuff just for RV's. It could just be a marketing ploy to charge $10 for a tube of sealant instead of $3, but most of the online stuff suggests otherwise.

Make sure everything is DRY before aplying sealant,,
Imo the PL polyurethane adhesive is one of the best,,
I also used silicone on wooden roof when instaling solar panel bolts and its still good after many years,,

I think the problem was just my drain channels being clogged. I cleaned them out and poured water in them and they worked great. We have also had some good rain and no problems. I am going to hold off on the resealing the windows for now, but I have two tubes of Proflex on the way anyway. If I get bored this summer, I may go ahead and redo them anyway.
Thanks for that video and advice.

esox07 wrote:
I have some Proflex RV on order from Campingworld.com. However, after watching a few youtube videos, it looks like I also need Butyl tape. Or does the Proflex substitute for the Butyl tape?

I have the corrugated siding on my RV so the surface is not nice and flat which makes me think that I would probably need the Butyl tape to fill in the low ridges on the siding.

This is a video that looks like my situation and how I will attack my window. Let me know if I am on the right track.

https://www.youtube.com/watch?v=belS_95xLcA

That's my video, so I'd do the same thing;) I haven't had any issues sealing windows that way & use Proflex over the butyl for an extra layer of protection. I use a double layer of buyyl on the sides to make sure the profile in the siding fills and it compresses all the way around the window frame.