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Old 03-15-2011, 11:35 AM   #1
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Kool Roof on rubber?

So upon a good inspection of my rubber roof, it's shot. It is paper thin in areas and doesn't take more than stepping on it to cause a tear.

I'm thinking that I should clean it well and put cool roof on it. I have checked Kool Roof's web site and they claim good adhesion to rubber. Any one have any experience putting it on a rubber roof?
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Old 03-15-2011, 11:48 AM   #2
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Quote:
Originally Posted by BobKomar View Post
So upon a good inspection of my rubber roof, it's shot. It is paper thin in areas and doesn't take more than stepping on it to cause a tear.

I'm thinking that I should clean it well and put cool roof on it. I have checked Kool Roof's web site and they claim good adhesion to rubber. Any one have any experience putting it on a rubber roof?

Good question, hope someone can answer it for both of us!
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Old 03-15-2011, 01:19 PM   #3
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Although expensive, take a look at this stuff; Liquid Roof, Liquid rubber for Roof, EPDM Rubber for Roof

It is truly designed to go over a failing EPDM roof and seal it for years; I'm not sure Kool Seal or Snow Roof will claim the same.

We spent a good bit on some "just as good as" big box store brand liquid roofing products for a previous MH- never again.
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Old 03-15-2011, 03:56 PM   #4
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Check out Polycoatings.com for their Safe T Plex coating. I'm going to use this on my 1979 motor home. They suggested 4 gallons to do my roof. No primer needed.
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Old 03-15-2011, 03:57 PM   #5
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Don't forget to use the Kool rubber primer first
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Old 03-15-2011, 04:52 PM   #6
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Triker, have you done this with a rubber roof before? Currently I have no leaks on my rubber roof, but I see them in the near future when I put the coach back into service with out some sort of coating.

The Kool roof sound like the hot ticket, it should help keep inside temps down, and should hold leaks at bay at the same time.
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Old 03-16-2011, 06:26 AM   #7
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Not yet. My rubber roof is over 12 years old and still looks good. I only wash it one time a year in the spring. Dicro says it could last 20 years when taken care of.

I mentioned the primer because it sounded like you was going to put Kool on without it. And Kool has it as a must for the new coat to last long.

Myself I would probably go with the Dicor Roof Renew kit
As they are the ones that made my roof. May be worth the few extra $$ to do it right.
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Old 03-16-2011, 08:24 PM   #8
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I just coated my EPDM roof. I used the liquid rubber from epdmcoatings.com which also appears to be(?) progaurdcoatings.com. I have some Sta-Kool elastomeric roof coating, but on checking the docs on it, it was not recommended for EPDM. I had a local RV shop inspect and they said it needed a wash and coating, and recommended Dicor. After working on the roof my thoughts are that it definitely needed cleaning. It had sat for sometime was dirty and mildew spotted. The rubber itself seemed to be still pliable though minimal. I used the Dicor wash on it and it did help, though I ran out after getting about 4/5s done. I then pressure washed it. The maker doesn't reaaly say that pressure washing is required, just a cleaning. The Liquid rubber is a two part coating, I didn't have any issues with it setting up too quick. I was working in about mid 50s temperature. The coating was like trying to spread Honey. I trimmed in the edges to where the roof was flat, and around the ACs and vents. I then pored the coating on and spread with a roller. The Liquid rubber requires IIRC 24 hours at 55 degrees to cure. I'm still waiting for it to cure. I wasn't able to do it inside so there is some debris in the coating. It did bubble under the rubber on the sides. The bubbles maybe caused from solvent in the coating. There was a reference in the documentation I read.

I didn't go with Dicor, because you had to wash with their wash before using their coating. That IMO leaves there coating suspect, it actually quite good.

Larry
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