Forum Discussion

BreakAes's avatar
BreakAes
Explorer
Sep 24, 2019

Best Self-Leveling Sealant For An Aluminum Roof?

I'm trying to figure out which self-leveling roof sealant would be best to use for my 1996 Lance Squire 8000 truck camper with an aluminum roof and sides.

The guy at the RV store recommended Nu Flex 311 Self-Leveling Silicone for the roof.

I've read that some people hate using silicone because it can be difficult to remove. I got Auto Tech Quick N Easy Adhesive Remover, and maybe that would make dealing with it easier if I needed to redo the roof's sealant, but I'm not sure.

I know that the Dicor brand sealant is popular for roofs, but I read that some people hate it because it shrinks too much.

The Nu Flex 311 only has 7 reviews at Amazon, but they're all good: https://www.amazon.com/Hengs-95502-White-NuFlex-Sealant/product-reviews/B003YJNO98/ref=cm_cr_dp_d_show_all_btm?ie=UTF8&reviewerType=all_reviews

Also, someone said, "Sticks well to other silicones (including CSL)." and a couple reviewers like it better than Dicor.

I haven't done a lot of research on self-leveling roof sealants yet, but this one seems like it might be a good choice.

Any thoughts on what sealant is best for an aluminum roof?
  • joelc's avatar
    joelc
    Explorer III
    Sep 25, 2019
    I have a Vinyl roof and use Dicor. I would call them to see if they recommend it on Aluminum. One note about Aluminum. I had a Class A once that had an AL roof and it developed bad leaks and pin holes. Seems the manufacture installed the AL over steel without a barrier. That caused electrolysis in the AL causing failures. Be sure your RV does not have that issue.
  • Cocky_Camper's avatar
    Cocky_Camper
    Explorer II
    Sep 24, 2019
    We have a Fiberglass roof on our Class A, and just sealed all of our seams in May with Proflex RV Instant Roof Repair. That stuff isn't going anywhere for a while. Just painted on it with a paint brush. I recently checked, and still looks great 6 months later.
  • noteven's avatar
    noteven
    Explorer III
    Sep 24, 2019
    Maybe give Lance a call and ask what they recommend.

    I’ve had 2 rv’s (not Lances) that used certain SikaFlex products from factory.
  • Charlie_D_'s avatar
    Charlie_D_
    Explorer
    Sep 24, 2019
    I use Dicor exclusively. Never had a problem with shrinkage. Tried several others including several of the ProFlex types but they skin over so quickly I find them almost impossible to apply.

    I have had 5th wheels since 2005 and have not noticed any shrinkage of the Dicor.

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