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Francesca_Knowl's avatar
Mar 19, 2014

Easy roof vent reseal?

Posting this question for a friend- he's got a leaky vent and doesn't want to remove it to fix. He's wondering which if any of the following will do the trick: Dicor Lap Sealant (self leveling), Dicor Lap Sealant (non-leveling) or Geocel PeoFlexRV ?

He's also open to other suggestions... so long as y'all don't make him take the durn thing off and start from scratch! ;)

Thanks!
  • Use the eternabond tape first, then go around the eternabond with the self leveling dicor. My sunroof in the shower was leaking two years ago. Dry as the sahara ever since.....
  • Have your friend look at the factory caulking and see if it is cracked. If it is then the easy fix is to go over the existing caulk with Klean-Strip Industrial Maintenance Coating Thinner which is sold by Home Depot. Once the caulk is clean he can apply the Dicor self-leveling sealant.

    If the vent itself is cracked the cheapest approach is to cover the crack with Eternabond tape and again the area needs to be cleaned first with whatever Eternabond recommends.
  • epdmcoatings12 wrote:
    I removed the vents cleaning up all the gunk previous owners as well as the factory had put on them and then using butyl tape to reset the vents which is the overwhelming first choose of most here who have redone their vents or any other exterior part on the trailer. For more information RV roofs need repair

    Butyl tape can be very effective in roofing applications but you need to be very careful with the tape you chose. Not all Butyl tape is created equal and some are incompatible with common RV roofing materials.

    When it comes to things like roof vents I say just cover the edges completely with something like Eternabond tape. It's easy and very effective.
  • Francesca Knowles wrote:
    Posting this question for a friend- he's got a leaky vent and doesn't want to remove it to fix. He's wondering which if any of the following will do the trick: Dicor Lap Sealant (self leveling), Dicor Lap Sealant (non-leveling) or Geocel PeoFlexRV ?

    He's also open to other suggestions... so long as y'all don't make him take the durn thing off and start from scratch! ;)

    Thanks!

    Dicor Lap Sealant is the correct product to use to fix the leak but it's unfortunately only effective when you know where the leak is and cover it properly with new sealant.

    I wouldn't want to remove the vent unnecessarily either as pulling that sealant from the roof can do more damage than good. He will need to do a thorough inspection to find and confirm the leak, then clean and apply new sealant etc. Just putting another layer over everything is likely a waste of time and will complicate things when he has to go back up and fix it again.
  • I removed the vents cleaning up all the gunk previous owners as well as the factory had put on them and then using butyl tape to reset the vents which is the overwhelming first choose of most here who have redone their vents or any other exterior part on the trailer. For more information RV roofs need repair
  • Yea boy, trust me. Make sure you leave a large footprint of an area you cleaned. If not, the Dicor police will be on you in no time :)
  • Another vote for Dicor, I have used the self leveling with good results. He should remove any old sealant that is loose and clean the surface as clean as possible. That should work as long as there is no silicone caulk already on it, nothing will stick to that stuff.
  • Dicor lap seal would be my choice. But lots of people swear eternabond tape is the only way to go. If the vent is leaking and not the seal around it nothing short of removing and doing it right is going to help

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