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Hi Folks,

I am trying to figure out what caulk is best for my trailer. I want a caulk for the side of the trailer and not the roof. Has anyone use this brand. Pro Flex RV caulk ? I would like to hear the pro's and con's. What other brand should I look at ?

All input is welcomed,

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There are many types of caulking and sealants. I too prefer Dicor 551LSW non-sag caulk/sealant for vertical surfaces, and Dicor 501LSW self-leveling sealant for horizontal surfaces. It is designed especially for use on RV exteriors.


I never use a silicone sealant on my RV, there is a reason it's the cheapest on the shelf.


Edited by Ray,IN


2000 Winnebago Ultimate Freedom USQ40JD, ISC 8.3 Cummins 350, Spartan MM Chassis. USA IN 1SG retired;Good Sam Life member,FMCA ." And so, my fellow Americans: ask not what your country can do for you--ask what you can do for your country.  John F. Kennedy 20 Jan 1961


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I've tried many, and Lexel is the best.  Look at the links above for the Nomad Detailer for how to apply it somewhat easily.  I used to redo the ProFlex a couple times a year.  Lexel holds up much better, but is a royal pain in the butt to apply the first time.  You can get it in clear, white, or black at Lowes or Ace Hardware.  Clear is usually available, the other two are hit and miss.

2001 VNL 660

2018 DRV Fullhouse JX450

2018 Jeep Wrangler Rubicon

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  • 2 weeks later...

Geocel Proflex is a great caulk and is used on new Keystones at the factory. I also use Lexel on occasion because it is readily available but Lexel doesn't hold up as well.

2018 Keystone Cougar

2016 Chevrolet Silverado 3500 DRW D/A

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