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BreakAes
Explorer
Sep 10, 2019

Best Solvent To Remove RV Window & Roof Caulk?

Hi all,

I've been doing research on what the best solvent is to remove RV window and roof caulk. I don't know what was used by the previous owners, but I'm currently using Pro-Flex to seal up the windows and panels on the sides, and I'm open to caulk product suggestions for the roof. I have a 1996 Lance Squire 8000.

I'm at the point where I need to get a solvent to get the rest of the caulking off. Originally I thought I might get So Brite DSR-5 (also known as Re-Mov), but the reviews are mixed, and some of the prices are high: https://www.amazon.com/So-Brite-DSR-5-Ready-Solvent/dp/B00ANN7IAO#customerReviews

The local RV store rep suggested Crest Acry-Solv, which also isn't cheap, but may be more reasonable than the So Brite product. Crest Acry-Solv seems pretty rare, but here is some positive commentary on it:

https://signs101.com/threads/adhesive-removal.66954/
https://detailingbliss.com/threads/your-favorite-tar-remover.7154/
https://www.toyota-4runner.org/maintenance-detailing/218072-getting-adhesive-off-body.html
https://www.autogeekonline.net/forum/auto-detailing-101-a/36129-how-remove-road-paint-off-car-paint.html

There's also this Transtar Acry-Solvent, which is less expensive and got some good Amazon reviews, although somebody said he prefers benzene, which I think I'll take a pass on. I don't know if any of them are using it to remove RV caulking though: https://www.amazon.com/TRANSTAR-9784-Acry-Solvent-Quart/dp/B000RI57A8#customerReviews

Has anybody used any of these 3 solvents to remove RV caulk? Or do you have a suggestion for something else to use to remove RV caulking?

I'm leaning towards going with the Crest Acry-Solv, but let me know if you have any information for me, thanks.
  • I'm just finishing up redoing my entire fifth wheel… Graphics and roof recaulk and coating. I have several solvents in my garage and I ended up mixing mineral spirits and xylene about 50-50 and that worked the best of all the solvents I had around. It still won't completely dissolve any of the adhesive or caulks but at least it softens and makes it easier to scrape off. I scraped off all the black and cracked caulking on the roof and left the rest of the caulk that was still clean and stuck good. I replaced all of the round head screws with countersunk flat head screws and did a nice smooth re-caulking. After the caulk was set up I put eterna bond tape over it and then the roof coating over everything. I think the self-leveling dicor caulk is garbage because it shrinks so much so I used the non-self-leveling dicor on the roof. I removed all the trim pieces and fixtures on the sides and cleaned off the old Geocel and putty and reinstalled everything with a good grade of latex caulk and wiped off the excess caulk after everything was tighten down.
    FWIW, i've been getting away from any petroleum based caulks, little by little. I replaced a skylight in 2016 after a hailstorm and I used Latex caulk and it was still white and in excellent shape. Craig
  • Acetone or lacquer thinners do a good job of dissolving most things.