Saturday, September 30, 2023


Off, off, dratted sealant!

By Chris Dougherty
Chris Dougherty is a certified RV technician. Here is a letter he received from a reader while he was serving as’s technical editor.

Dear Chris,
Recently I decided to add some caulking to areas (that I felt needed it) on the exterior of our fiberglass clad trailer to make sure no water could get in. I’ve been told this is a good thing to do. After I did quite a bit along one side, I thought I would check the package to make sure that it goes on white and dries clear. Unfortunately, it does not. I had inadvertently bought white RV caulking. The problem is that our trailer is beige. I needed clear. My question is what is the best way to remove the white caulking so I can replace it with clear? —Astrid

Dear Astrid,
Worry not, a common mistake. Fortunately the same company has a fix for you, as Geocel makes ProflexRV in a clear and beige formulation, among other colors, and can be found on Amazon here.

As for removing the old sealant, I would recommend using a plastic “non-marring” scraper so as not to damage the sidewall of the coach. I use these and they work great!

According to the sealant manufacturer, once cured, solvents will not work on it, so you will need to scrape it off.

##RVT776 ##RVDT1281

Russ and Tiña De Maris
Russ and Tiña De Maris
Russ and Tiña went from childhood tent camping to RVing in the 1980s when the ground got too hard. They've been tutored in the ways of RVing (and RV repair) by a series of rigs, from truck campers, to a fifth-wheel, and several travel trailers. In addition to writing scores of articles on RVing topics, they've also taught college classes for folks new to RVing. They authored the book, RV Boondocking Basics.


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Gene Cheatham
3 years ago

I may be not 100% certain on this but believe all the old sealant will have to be removed — even tiny amounts as silicone sealant will not adhere to silicone sealant. Check the manufacturers label or give their customer service number a call to see.

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