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Topic: New style TPO roof not compatible with Dicor lap sealant?

Posted By: rightyouareken on 02/26/13 06:55am

Hi all,

A few weeks ago I came across this article:
http://dicorproducts.com/eblast/DP12-8/

I was poking around in our new Jayco this weekend and was looking in the ac vent hole in the roof. I was looking at the roof membrane. It is white and textured on top and white and smooth on bottom. It doesn't have a fleece lining. So it looks like I have this new formulation of TPO roof that requires a different sealant than the traditional Dicor self leveling lap sealant.

Has anyone else found their trailer to have this new formulation TPO roof as well? Wondering how common it is.


2012 Ford F150 FX4 5.0 3.73 SuperCrew Short Bed
2013 Jayco JayFlight 24FBS, Equal-i-zer 1k hitch



Posted By: WoodGlue on 02/26/13 07:04am

I haven't looked at my 2013 Lance 1685 TPO roof yet, except for the PDI. I'll take a look this week and see how many people answer you and what their answers are

WoodGlue


Posted By: thomasmnile on 02/26/13 07:18am

rightyouareken wrote:

Hi all,

A few weeks ago I came across this article:
http://dicorproducts.com/eblast/DP12-8/

I was poking around in our new Jayco this weekend and was looking in the ac vent hole in the roof. I was looking at the roof membrane. It is white and textured on top and white and smooth on bottom. It doesn't have a fleece lining. So it looks like I have this new formulation of TPO roof that requires a different sealant than the traditional Dicor self leveling lap sealant.

Has anyone else found their trailer to have this new formulation TPO roof as well? Wondering how common it is.


If it is the roof membrane like we have on our new WhiteHawk, it is an EPDM membrane sold under the name of Brite Ply and it is a Dicor product. Website HERE.


Posted By: rightyouareken on 02/26/13 08:33am

It sounds like they now use something called "Alpha-Ply" on their trailers. I confirmed on both the JayFlight and Whitehawk line on their website.

http://www.jayco.com/products/travel-trailers/jay-flight/construction
http://www.jayco.com/products/travel-trailers/white-hawk/construction

http://www.alphasystemsinc.com/Product/Detail/19?producttypeid=1

Interesting. Still researching.


Posted By: JJBIRISH on 02/26/13 09:24am

Just another of the many reformulations in TPO’s jaded history… each reformulation is the next cats meow in roofing…

TPO has been reformulated at least 5 times and each mfg has their own version of the new formulation, I don’t know how anyone knows what to use with it… one things for sure when you work on TPO or even install new TPO you don’t know what formulation you are working with, and none of them have a history to base which is good, better, or worse… I assume the reformulations are because of problems or failures of previous versions…

Alpha-Ply I believe is the second attempt at non-backed TPO… I wouldn’t want it on my roof until they can figure out a formulation that is good for the long haul…


Love my mass produced, entry level, built by Lazy American Workers, Hornet



Posted By: spadoctor on 02/26/13 09:37am

TPO was the first membrane roofing on the market...long before EPDM. Neither of these products were designed for the RV industry but rather for flat roof buildings. Once Firestones patent ran out other manufactures, such as GAF and Alpha started to produce their own TPO. As such their formulations are slightly different. In the RV industry the felt backing was the problem. The problem arose when Alpha had the backing too wide and if it rapped over the edge it caused water to wick up if there was any leak in the sealant. That is why the felt has been removed. One thing about TPO that is better is it does not "sluff" off, can easily be cleaned and if a ppatch is needed it can be bonded like PVC pipe eliminating caulking the edges of a patch. I know this because my 07 Durango needed a roof because of the fely and an actual oversealing by the factory. Alpha paid KZ 60% of the repair bill and the factory the rest. KZ also recommends as do Firestone and GAF that you use the sealant developed by them for their product. I for one, having had metal...EPDM...and TPO roofs would rather have TPO over the others. I get my sealant from my dealer...Alpha products for flat and verticle surfaces...each is different.


Posted By: Bama bluejay on 02/26/13 09:39am

We had an 07 Jayco Jayfight, roof was TPO with the backing, had a leak and dealer said that roofing had been a problem. Was told they would not be using that one in new models. He explained that the backing was soaking up water like a wicking effect.


Posted By: thomasmnile on 02/26/13 10:24am

rightyouareken wrote:

It sounds like they now use something called "Alpha-Ply" on their trailers. I confirmed on both the JayFlight and Whitehawk line on their website.

http://www.jayco.com/products/travel-trailers/jay-flight/construction
http://www.jayco.com/products/travel-trailers/white-hawk/construction

http://www.alphasystemsinc.com/Product/Detail/19?producttypeid=1

Interesting. Still researching.


My bad, don't know where I came up with Brite Ply. Checked my trailer's documentation and it is Alpha Ply. [emoticon]


Posted By: rightyouareken on 02/26/13 10:30am

thomasmnile wrote:


My bad, don't know where I came up with Brite Ply. Checked my trailer's documentation and it is Alpha Ply. [emoticon]


It's ok, when you said Brite Ply it sounded plausible. I recall reading about Brite Ply somewhere, but can't recall where now.

Thanks for the info all! Now to track down a compatible sealant for the Alpha Ply. The Dicor "Ultra Sealant" that supposedly will work seems hard to find online.


Posted By: thomasmnile on 02/26/13 10:36am

Alpha states their "1010" lap sealant products should be used for sealing the roof penetrations. Did a Web search for it, Tweety's and an RV place in Virginia Beach, VA. sell it for local pickup only, will not ship it because of its "hazmat" nature.

I was recently at the dealer that sold us the WhiteHawk and mentioned that the sealant applied to the roof ladder mount points was cracking (on the frame tubes about 4" up from the roof. Factory applied it that far up). The service person told me I could seal the cracks with ProFlex.


Posted By: WayneAt63044 on 02/26/13 11:44am

You shouldn't have to guess about what roofing membrane you have. Look on the warranty documents provided when you bought the new trailer.


2012 Forest River V-Cross Vibe 826VFK
pulled by 2009 Ram 1500 Quad Cab Hemi


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