I was on my travel trailer roof and noticed the seals around the roof vents, antenna etc. were getting cracks and showing voids. From my research is seems that conventional wisdom suggests it is okay to apply new self-leveling Dicor lap sealant directly over the existing lap sealant; at least for the first few applications. This roof (EPDM) is three years old and this will be the first time the roof vents will be resealed.
It would really make me smile if I don’t have to remove the old sealant.What are your thoughts or experiences?
Thanks,
Steve
Terry and Jo said
08:39 PM Nov 18, 2019
Steve,
We haven't had to reseal around vents or A/C units, but I have used the Dicor to seal any cracks that I might see on the seams of the front and rear caps of the fifth wheel. I've also used it around some of the small "vents" that aren't really vents, but access to wiring in the ceiling. We've had our Mobile Suites since May of 2010 and have had no roof leaks, even from where I've resealed. We also have the "rubber" roof, which I think is the EPDM.
I'd say that this could be a "first step" for you to do.
All that said, I'm sure more knowledgeable folks will be along to either agree or disagree with what I've said.
Terry
MAYBE2021 said
11:20 AM Nov 19, 2019
Thanks for your input Terry.
It's funny though how divers the experiences are on this (and many other subjects). Some say these should be re-sealed every year and others have experiences like yours; no problems in nine years. I'm sure the environment the RV lives in is a contributing variable.
Steve
LarryW21 said
01:10 PM Nov 19, 2019
No leaks for me but I use Heng's once a year...just finished an preventative application.
MAYBE2021 said
01:53 PM Nov 19, 2019
Thanks Larry. Tell me about Heng's.
Steve
LarryW21 said
06:30 PM Nov 19, 2019
Thicker than paint but I use a brush to apply at least yearly. I coat every seam, bubble, footprint etc. on the roof. No leaks since my initial use in 1979 on various RVs. Suggest buying a quart. It goes a long way.
Looks like an interesting product Larry. Since my lap sealant already has cracks and voids (Texas sun) I assume I should apply new self-leveling sealant (Dicor) before applying the Hengs roof coating as preventative maintenance.
I was on my travel trailer roof and noticed the seals around the roof vents, antenna etc. were getting cracks and showing voids. From my research is seems that conventional wisdom suggests it is okay to apply new self-leveling Dicor lap sealant directly over the existing lap sealant; at least for the first few applications. This roof (EPDM) is three years old and this will be the first time the roof vents will be resealed.
It would really make me smile if I don’t have to remove the old sealant. What are your thoughts or experiences?
Thanks,
Steve
Steve,
We haven't had to reseal around vents or A/C units, but I have used the Dicor to seal any cracks that I might see on the seams of the front and rear caps of the fifth wheel. I've also used it around some of the small "vents" that aren't really vents, but access to wiring in the ceiling. We've had our Mobile Suites since May of 2010 and have had no roof leaks, even from where I've resealed. We also have the "rubber" roof, which I think is the EPDM.
I'd say that this could be a "first step" for you to do.
All that said, I'm sure more knowledgeable folks will be along to either agree or disagree with what I've said.
Terry
It's funny though how divers the experiences are on this (and many other subjects). Some say these should be re-sealed every year and others have experiences like yours; no problems in nine years. I'm sure the environment the RV lives in is a contributing variable.
Steve
Steve
www.classacustoms.com/1-Gallon-Hengs-Rubber-Roof-Coating--White_p_147.html
Steve