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Old 02-22-2014, 05:22 PM   #1
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Dicor on TPO roof

I was looking at Dicor sealant at CW today and the tube says "May not be suitable for use on some TPO roofing". It also contains Petrolium Distillates. My Bounder's user manual says that it has a TPO roof and to not use products with Petrolium Distillates on it as it will swell. I inquired about this with the CW sales person and she brought over someone from the service department that told me that they use Dicor on Bounders all of the time with no problems. I have had some bad experiences with the work performed on my rig at CW so I have a reasonable doubt regarding their expertise in these matters.

Has anyone had any problems using Dicor on TPO roofs? I thought there was only one supplier of TPO roofing so why would the notice on the product say "some TPO roofing"?
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Old 02-22-2014, 06:50 PM   #2
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Which Dicor number were you using?

I've used Dicor 501LSW plenty of times, with NO issues at all on TPO, EPDM, fiberglass, and PVC roofs.

Dicor and Alpha both make TPO roofs, and I'm not sure who else.

However, I'm preferring Sikaflex 715 more and more to Dicor 501LSW.
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Old 02-22-2014, 07:00 PM   #3
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The original TPO manufacturers patent expired, I believe in 2010. So now there are several different TPO formulas on the market. read this explanation from Dicor when they released their new 2 part sealant
< Dicor Products introduces Ultra Sealant? to help avoid roofing problems that can occur with some new TPO roofing | The Dicor Corporation | Official Website >



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Originally Posted by RoamingGnome View Post
,,,,,
Has anyone had any problems using Dicor on TPO roofs? I thought there was only one supplier of TPO roofing so why would the notice on the product say "some TPO roofing"?
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Old 02-22-2014, 07:20 PM   #4
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I was looking at Dicor 551LSD. The Silkaflex 751 data sheet recommends usage on EPDM but I havent seen reference to TPO. I saw some sealants at CW that say that they are good for EPDM but specifically say not to use on TPO. I may be being overly cautious about this but I woud hate to rip up seams that are holding up 100% currently for preventive maintenance and wind up with leaks everywhere because I used an incompatable sealant.
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Old 02-22-2014, 08:15 PM   #5
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The old TPOs were fleece backed. Any water leaked was wicked up and rotted wood because the water was held by the fleece.
Dicor's TPO is non fleece backed. Dicor also says 501LSW will work on TPO, they just "suggest" their "ultra" product. Marketing is all it is.

I have contacted SikaCorp directly and Sikaflex 715 is ok on fiberglass, TPO, EPDM, and basically all that Dicor 501LSW is ok for.
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Old 02-22-2014, 08:48 PM   #6
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I use 303 Protecant on my Tri-Polymer Olefin roof. Use it
every 4-6 weeks. TPO is a modern high strength plastic
that is also used in indoor-outdoor carpet and other fabrics.
With decent care, should last a long time. Sun is the enemy.
I would not use anything on it that is not specifically stated
as being OK to use on TPO.
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Old 05-12-2017, 01:32 PM   #7
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What about Dicor Acrylic Coating on TPO? Dicor says it's ok, but with research I am not sure?
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