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Old 06-26-2022, 03:17 PM   #1
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Caulk cracking/drying

Hello, We have a class a 2014 Newmar Ventana motorhome. Our caulk on the outside between the slide and the trim around the slide is cracking and drying. What type of caulk do we use to replace it? And any recommendations on removing it? TIA
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Old 06-26-2022, 06:33 PM   #2
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Geocel Proflex RV is one good choice. Available in clear or colors.
Gary Brinck
Former owner of 2004 American Tradition and several other RVs
Home is West Palm Beach, FL
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Old 06-27-2022, 09:55 AM   #3
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I would check your manual. In our Tiffin manual, in that area they recommend silicone. Click image for larger version

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Old 06-27-2022, 02:30 PM   #4
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2003, we converted a 1996 Ford CF8000 commercial truck to our concept of an ExpeditionVehicle.
We use 3010 (three feet wide by a foot tall) dual-pane sliders designed for a stand-still house.
We mounted these at our eye-level standing inside, about eight feet above pavement.
For the sealer/adhesive, we used Vulcum 116.
Nearly two decades full-time live-aboard.
Twenty-four months twenty-four thousand miles around South America.
Alaska, Panama, all over North and Central America.
The Vulcum 116 remains soft and pliable.
re -- silicone chalk
Semi-retired welder-fabricator here.
The squeeze-tube stuff you use around the tub in a stand-still house would be my NEVER choice.
Based on a half-century of camping in lesser rigs, experimenting with all kinds of combinations of components and chemicals, silicone chalk has zero-zero-zero stretch.
On a vehicle with each component constantly shifting, silicone chalk breaks, then requires a second application, then a fifteenth.
After a wet night with leaks everyplace, the silicone chalk must be removed so something appropriate can be applied.
Although silicone chalk fails at its primary mission of bridging gaps, it manages to adhere admirably.
To remove:
* you start with a putty-knife,
* quickly graduate to a chisel,
* by the third week -- family long-gone and the neighbors concerned for your mental health -- you are considering the nuclear option.
Trust me on this.
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Old 06-27-2022, 08:51 PM   #5
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Contact Newmar and use/follow what they recommend.
Those are critical sealing points because your house framing sits near there. Your subfloor is wood and using the wrong sealant is asking for trouble.
Tom & Bev, Riley 6yo Lab
2014 Entegra Aspire 44b, 2017 Jeep JKU
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Old 06-27-2022, 09:21 PM   #6
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Geocel Proflex RV as previously recommended. Never silicone. Silicone will not even stick to cured silicone. You need a nasty primer or fully remove it prior to using it again. No small task. You just cannot cut it away you must remove it all. There are things you can use to do so with a good stiff brush. I have done this in my S&B shower. Not fun. I did not use silicone calking to replace it. If your manufacture stipulates a calking, then use it, but you cannot go wrong with Geocel Proflex. It stays bonded, has some give, and UV doesn't seem to bother it.
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2013 Honda CRV
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