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jake2250's avatar
jake2250
Explorer
Nov 01, 2020

Strange Dicor issue

Well, we went out for a few days in a camp ground that has allot of Black Walnut trees.
Very early one morning it sounded like a brick hit the roof of the trailer. Went out and didn't see anything abnormal, but noticed a few walnuts on the ground.
These were no slouches, a little bigger than a golf ball and hard as He''!
Just went a did some seal inspection (winter prep) and found a few small dents in my rubber roof in front of the fridge vent.
I cleaned them off and found two of them had actually cut the roof membrane one was less than a 1/4 of n inch and the other had two small slits about a 1/8th of an inch.

So,, having a tube of Dicor Lap sealant, I put a dab of sealant on the cuts and rubbed them in a small circle to cover the cuts.

A few minutes later I noticed that the Dicor caused that area to swell and pucker. Actually wrinkling the membrane! WTF?
Did the Dicor shrink as it dried?
I do not see any additional tears or cuts but,,,,I am concerned now!
What did it do to the surrounding rubber roof area?
I went out and bought some Eternabond patch material and will check it again later in the week.

Is this normal Dicor behavior?? I have used it on all of my seams not covered by Eternabond and it had No effect on the roof.
I will post pictures when I go back to check roof.
  • Dicor is not a product that you rub in, it's a lap sealant.
    Perhaps you pushed it under the membrane.

    2009 we were camping under a dead tree which I reported and sure enough a limb came down and punctured roof.
    Installed RV roof patch that lasted 10 years until we sold.

    Yes unusual, always liked the ease of use with Dicor.
  • Sound like you possibly have a different type of Dicor that isn't compatible with the roof.
  • Looking forward to the pictures. Unusual. I would have used Eternabond.

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