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Post Info TOPIC: any good advice on a good caulking that bonds and moves well


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any good advice on a good caulking that bonds and moves well


My caulking keeps cracking does not expand and retract well enough on my pop out do to the movement any good ideas 



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What caulk brand are you using now?

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Winnebago TT 2101DS & Tahoe LTZ, 300 watts WindyNation solar-parallel w/MPPT, 2 Trojan T-125s. TALL flag pole. Prefer USFS, COE, BLM, USF&WS, NPS, TVA, state/county campgrounds. 14 year Army vet-11B40 then 11A - old MOS 1542 & 1560.



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We use a “clear” caulk on all portions of the coach that are painted (i.e., the sides). The specific caulk we are using is Geocel’s Pro Flex Crystal Clear RV Flexible Sealant. I initially learned about that caulk by reading various caulk related threads on different RV forums. RVs that are predominately white, or another solid color, likely have more options (e.g., Dicor). For the roof, we use Dicor*.

Some people have luck with silicone based caulks, but we decided against using silicone due to some friend's experiences and reading similar comments on various blogs and forums (e.g., the silicone caulk deteriorated relatively quickly).

With any caulk (particularly important with silicone), is to remove the old damaged caulk, clean the area well (e.g., use denatured alcohol) before applying the new caulk. Applying new caulk over older cracking caulk, even if the older caulk is well cleaned, will likely lead to the new caulk cracking.

Lynn

* Note: Although your question was not about roof caulking, I thought it might be relevant to mention (for others reading along) that we have had good luck using Dicor on our fiberglass roof. However, we had a RV shop suggest that Acryl-R SM5504 would be even better for a fiberglass roof (which we may switch too, although that product is harder to locate).



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2014 New Horizons Majestic 40'
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Just got done using the dicor caulking the non self leaving just yesterday and it working really well ,I have an advantage due to my fifth wheel is inside my garage so I dont have to worry about rain but it will take longer to dry ,seems like this stuff is going to be good and will ply well ,but the old stuff I used was a dap silicone and it did not stick as well and got stained very quickly ,If this works well Im going to do all my trim and windows ,hoping this is good imfo 

 



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RV-Dreams Community Member

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Dicor is what my repair shop used when my roof got completely redone (rubber roof) a couple years ago ,so far so good 



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K-z used a caulking that was colored to match the rv. It dried semi hard and did not attract dirt. Never had to touch it in 13 years..great product.

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RV-Dreams Community Member

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good to know thxs



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