How to re-caulk RV trailer roof?

[peterspeter]

I'm recaulking my RV trailer. Going well except these heavy lines of something slathered on the roof. When I try to lift, it seems the rubber roof lifts with it. How can this be repaired?
Here is a pic of the roof:

(Moderator edit to show picture)

Is there a good product I can go over this with?
We got the trailer for cheap and the look of the repair isn't as important as making sure it won't leak in the future.
For the smaller caulk lines I'm using thermoplastic caulking that people use for caulking outdoor window trim which is going well.
Thanks in advance!

[deltabravo]

Use Dicor Self Leveling Sealant

[deadticket8]

Also I think mineral spirits is pure. Paint thinner can contain additives like benzene. Good info on "the spruce".

[deadticket8]

I haven't used Henges, but Ill look for it next time. I use a white roofing compound out of a home improvement store, seems to do the trick.

[BarneyS]

Probably because that was not what the OP asked. Quite unusual though I will admit.:W
Barney

[Mr__C]

Is there a reason that no one has mentioned using Eternabond over the lap sealant?

[Pbutler97]

Vintage465 wrote:
I use the one that has the guy smiling at you on the label......can't think of the name.

That's Dicor, the smiling guy is Rudy. My wife seen a tube on my workbench and asked why a company would put a creepy looking smiling guy that looks like uncle pervy on a tube of caulking?

[Vintage465]

If I don't like the way something looks or if I need to remove it to replace whatever it is sealing, I use a heat gun(carefully) and an 1-1/2" putty knife that has the edges rounded and doesn't have a sharp edge. It would prolly take 30-40 minutes to remove all that. Then take mineral spirits, or as we used to call it "paint thinner" and a rag to scrub it up. If you want it super clean you can give it a once over with alchohol and a rag before using self leveling roof sealer. I use the one that has the guy smiling at you on the label......can't think of the name.

[trail-explorer]

Here's a useful video on Applying Dicor

[PAThwacker]

It’s best practice to remove all previous caulk and reapply fresh lap sealant. Also cover front roof trim holder. Leaks from screws also leaks from towing in rain on front seam. If really anal remove roof trim remove butyl tape. Buy new trim, new butyl tape, and new lap sealant.

[fallsrider]

I use the Dicor self-leveling lap sealant, as well. It sticks good and lasts. I clean the area first with denatured alcohol.

[Duane4238]

I've used the Heng's product but was not impressed. It seemed very thin to me. After 2 years it started to peel-lift. On my most recent trailer, I had a questionable area on my larger slide. After thorough cleaning, I rolled on a product I'd tried at home. It's FlexSeal Liquid. The manufacturer says it's good for EPDM roofing so I gave it a shot. It is very thick stuff, which is what I wanted and I rolled it on nice and thick. It dries into a flexible rubber. I used it 2 years ago and it still looks like new, and the slide roof doesn't leak. I'm going to go around the whole perimeter of the roof with a roller and this stuff to put a new coat of sealant on the edges. It comes in black or white. I used the white. Also comes in a paste you can put on with a putty knife if you have any open areas that need filling.
Duane

[2oldman]

coming back?

[schlep1967]

What you are looking at is lap sealant. Here is a link to Amazon where you can buy it Linky or any RV place will have it.Do not use the caulk you have now.

I have removed old lap sealant. On a sunny day you can use a plastic putty knife and patience to get it off. Or even a hair dryer to warm it up.
Make sure the area is clean before applying the new lap sealant. Instructions can be found on the tube.

[JIMNLIN]

When applying a self leveling roof sealant over OEM sealant don't make a dam to stop the roof from draining. Big blobs across a area can cause pooling (lake effect) up there ...that ain't good.

If the OEM sealant isn't loose I leave it as is.
My old '97 32' 5er still has OEM sealant (80-90 percent) in most spots on the rubber roof material.

There are some good self leveling sealant brands out here for resealing those loose spots.