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Old 01-14-2015, 07:30 PM   #1
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TPO roof help

I've recently purchased a class A with what I've found (from the manufacturer) has a TPO roof on my 1999 coach.

Roof is very dirty (coach was only driven to emissions every year for the past six or better years) and shows signs of "spider web cracks". Being as I will store under cover and use as my weekend cabin on wheels, I don't think I need to replace it yet (it doesn't leak). But would like the insurance of applying a protective coating on it.

I'm wondering has anyone coated a TPO roof with a given product. Please don't comment on EPDM roofs as there is a marked difference, or so I've come to find. I was sold on the Pro Guard "Liquid Roof" product, until I found out it would cause an unwanted chemical reaction with TPO I have not been able to find a coating that is recommended for TPO roofs, so any help would be appreciated.

Always in loving memory of our son Garrett
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Old 01-14-2015, 07:51 PM   #2
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I also have a TPO roof and while I cannot help with an answer to your question, I can tell you that TPO is widely used on commercial roofs. You may pose the same question to a roofing company or even a roof material wholesaler. My kind of work puts me on a lot of TOP covered roofs and I can tell you, they will take a lot of abuse and last a very long time. Hope you get an answer soon.

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Old 01-15-2015, 04:01 PM   #3
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Originally Posted by chuckftboy View Post
Hope you get an answer soon.
I have a TPO roof on my 13 year old 5er and it still looks like new! My son and I did put Eternabond on the front and rear seams and around the skylights, etc., and re-caulked around the vents as preventive maintenance last spring. I had rubber (EPDM) on my last trailer and had trouble with it shrinking and being dirty looking. Before I sold it I re-caulked the front and rear seams and had to make about a 4" wide bead of caulk. Wish I had known about Eternabond back then...

Oh - no spider web cracks on mine and it has been stored outside in Colorado all its life.

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Old 01-16-2015, 07:21 PM   #4
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Spider cracks in TPO? Wow - that's a new one on me. TOO is flexible, do shouldn't develop cracks. Besides, I don't know of any RVs that used TPO roofing in 1999. Are you sure you don't have a fiberglass sheet roof? Those can crack (although its fairly rare there too)? What make and model RV are we talking about?

But to answer your question, Best Materials sells a flexible epoxy roof coating frm AES that is suitable for TPO sheet roofing.
AES-100 Flexible Epoxy Roof Coating, SPECIFY Color (1G)

NovaTuff RC-100 is another product that claims compatibility with TPO
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Old 01-16-2015, 07:44 PM   #5
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If it is truly a Tpo roof there is a product called Duck Coat available at Menards $199.00 for a 4.75 gal pail made for commercial Tpo roofs it is a solvent based as a Tpo roof requires either a solvent base product or a solvent based primer for proper adhesion . I called the manufacturer before buying and talked to the tech supervisor about the product and using it on an rv . It is a flexible coating that stands up to ponding water with no effect average life of the product 20 years . I did mine 2 years ago and am very happy with the product it is Snow White and reflective . It is suitable for TPO as well as Edpm . It is recommended that you apply 3 coats the 1st should be very thin where you can still see through it to prevent wrinkling the roof if you should get a wrinkle it will smooth out in time . Apply with a long nap roller it takes about 6 hrs to dry .
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Old 01-24-2015, 04:51 PM   #6
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Coach is a 99 Four Winds Majestic and mfg. confirmed it's TPO. Too bad I didn't see (didn't forward to my cell?) the last two responses sooner - I'd have looked into them. As it is I decided to bite the bullet and replace with rubber. They made me a good deal ($4,000.00 on a 34' coach), just looked at it today though and think they may not have adhered it well enough. We'll see.

Thanks for the replies!

Always in loving memory of our son Garrett
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