Forum Discussion

TripleClamp's avatar
TripleClamp
Explorer
May 26, 2017

Trim on front cab underneath - how to seal?

Going to attempt to recaulk stuff and want to re-seal the bottom trim on the front cab.

Picture

What is this stuff (the red down arrow)? I was thinking about using white PRO FLEX RV FLEXIBLE SEALANT for this but then walking through Walmart I saw a bunch of outdoor weatherproof caulks that were over half the price.

How is this trim held in? There's only one screw on each side. My though was to just scrape off the caulk, then recaulk. The rubber seams flexible.

Thanks.
  • Cali-MinnieWinnie wrote:
    My husband just tackled this project! After much research, he used seal-tite corner seal (only available on line and high shipping and handling, but great stuff)


    Thanks, I did run across that at some point in my searching but didn't think of using it for the flat trim but looks like a good idea.
  • My husband just tackled this project! After much research, he used seal-tite corner seal (only available on line and high shipping and handling, but great stuff) http://www.sealdesignllc.com/catalog/seal-tite-corner-seal/ and sikaflex 1a to finish it off.
    The most time consuming part was cleaning up the trim. We reused the vinyl insert because it was in good condition and we couldn't find anything as heavy duty as the original.
  • Great thanks. I'll pop the ends and see if I can pull the vinyl strip out and see how it looks.

    You mentioned Dicor. What model/version? I'm assuming the non leveling Lap Sealant? It's going to be applied upside down. I would I assume I just need some lind of flexible caulk like the the ProFlex I mentioned.
  • The two screws you see are only for end caps. As Don said, there's a vinyl insert in the middle of the channel that gets pulled out and there are more screws, one every few inches, underneath.

    On my motorhome, I only sealed the leading edge of this piece and intentionally left the trailing edge unsealed. My theory (which may not be valid) was that this stood a chance of providing a sort of drain for any moisture that might get into the cabover structure, and the air flows and so forth are such that there's no practical way for water to work its way backwards into the seam. Rain would have to be falling up or the RV driving in reverse at great speeds during a downpour, neither of which I saw as likely events.

    Underneath this trim piece the edge of the front sheet of filon or whatever overlaps the sheet on the bottom of the bunk board.
  • If that is a joint seam and it appears to be. Then go buy a roll of butyl putty tape, carefully remove the,vinyl piece. Under it you will find a lot of screws. Take the screws out, and carefully lift the aluminum off. Clean everything apply a new bead of the putty tape, screw the trim back on, clean up the excess, apply a bead of Dicor, put the vinyl cover back on. Done!