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Old 10-24-2014, 04:45 PM   #1
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Posts: 258
Dicor cracks on lap seal?

Well while sealing my running lights I noticed that I have quite a few rather large cracks/gaps in the Dicor on the cap seals in the front and back of coach..(.Coach is 4yrs old). And have a few questions I hope someone can help me out..

Can I just clean the old Dicor with denatured alcohol (or mineral spirits) and caulk over it??( I know mineral spirits are rough on rubber)

Do I just fix the areas that are cracking..Or should I just re coat all the seams again??

And the most important much weight can the roof support..I'm 6' 5" and 285... Can I safely walk on the roof without damaging it??

Thanks in advance...

2010 Georgetown 300FWSSouth Florida
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Old 10-26-2014, 04:01 PM   #2
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Location: Albany, GA.
Posts: 599
One of my best sources for RV repair info is a local guy who has worked on RV's for 18 years at his shop in his back yard. I will take his advice any day over the local "Nationwide RV" dealer/repair center. Ron tells me that Dicor is a good product and depending on who puts it on and how it's put on the Dicor will seem to develop cracks in it particularly between layers. He says all of these are not actual cracks, some are where dust/dirt get down in between the overlapping layers of Dicor and the darker dirtier look appears to be cracks. Cleaning the affected area really well is the number one thing to do. He recommends any soap you would use to wash your auto/truck and to use a toothbrush to get down into what may or may not be an actual crack. Using a larger brush wash the entire area that has previously had Dicor applied to it, rinse well and allow to dry thoroughly. Ron states that if the Dicor does not appear to be too old (that's a good call there) then more Dicor can be applied directly over the area that appears to have the crack creating a piece of mind at least. After I bought my '05 model FR TT he showed me all of this on the top of mine along with how to treat the different appearing areas. Two of my roof vents needed to be stripped and re-coated with new Dicor and sealant. How much does he charge me for this info? Usually a couple of hours of helping him on a large project that has been brought in to him. A learning experience for me and a good trade off. OH--I am 5' 9" and a bit over 200# and have walked all over the roof of my unit although I try to stay neat the edge as much as I can.

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Old 10-26-2014, 04:08 PM   #3
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Are they large cracks and the old dicor is pealing off in spots or just small ones that are the norm? If they are large I would clean old off old and start new If they are the normal clean with mineral spirits and caulk over old.
Think about things before you do them make life easier not harder.
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Old 10-26-2014, 08:36 PM   #4
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Location: Fraser, Michigan
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I was told that if the old dicor is lifting up then remove it as best as you can, clean with de-natured alcohol and put on new dicor. If it is cracked then clean and put new dicor over it. I used a tooth brush and de-natured alcohol.

Jim & Kathy
Bailey, waiting at the Rainbow Bridge
Gracie, a rescued Beagle
2007 Chevy Tahoe
2008 FR Surveyor 233T
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