Kee Wanabee's

DuPont Elvaloy KEE

Today the market finds itself facing a new Elvaloy / KEE proposition from a number of manufacturers claiming to know what they’re doing with the polymer.  Sure, theoretically, a PVC membrane with some amount of Elvaloy is better than one without. But there is so much more to vinyl technology than just adding Elvaloy. And, keep this in mind as one of the big name brand roofing manufacturers comes on board with their KEE-lite membrane; what is their history with vinyl membrane technologies?  These folks are still trying to figure out how to stabilize thermoplastic polyolefin to obtain more than 10-years of service out of them.

When originally introduced, these 40-45-mil “non-plasticized” TPO membranes claimed they didn’t require thickness for performance.  And after numerous formulation changes, what was the principle answer to the roof top failures and extending longevity?  Make it significantly thicker than the original and much touted 40 mil sheet that didn’t depend on plasticizers.  80-mil is quickly becoming their norm.

Purchasing a technology does not make the company that buys it an expert in the technology.  For example, there is a new sheet being introduced that uses a “new” Elvaloy polymer centered on butyl acrylate instead of vinyl acetate.  This is a new polymer for roofing membranes without a time proven track record.  The manufacturer is promoting a new technology and new material again but selling a similar story line.  This technology is being touted as being just like or even better that FiberTite.  And of course you get a great warranty.  This is the same old song and dance used during the introduction of TPO’s in general.  Sure, the TPO manufacturers are taking care of their warranty commitments but to what aggravation for the customers?  The best warranty on the market is the one you don’t need.

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About Mr FiberTite

After 10-years in Local 88 out of Canton Ohio, the opportunity to drink the FiberTite Kool Aid came in 1984.  Since then I've been a student as well as a teacher in all manner of roofing with a focus on the engineering, design and installation of thermoplastic single ply roofing systems.  The industry is growing in complexity so there's plenty of opportunity to learn and sharpen your skills no matter who you are.  Hence, one of the most important things I've learned is that "to sharpen the blade, you have to rub steel with steel".

Disclaimer

FiberTite® is a Registered Trademark of Seaman Corporation.  The views and opinions expressed on this site are not necessarily those of Seaman Corporation.

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