EPDM Roof Repair

Liquid roof...

http://www.epdmcoatings.com/liquid-roof.php

We restored the roof on our 96 Southwind last summer.
Clean it well before applying anything. I used Eternabond on the seams and roof edges.
Then I coated the roof with Heng's Rubber Roof Coating. I used a small roller and a brush to apply two light coats. It goes on easy and does a nice job. So far it's holding up well to rain, sun, wind, snow and ice.
I bought 3 gallons and used about 2 1/2 gallons to cover 30' of roof on our 37' Southwind.
I will use Heng's again.

I have not used that brand however I don't see why it would not work. X2 on the using eternabond on the seals.

KoolSeal is silicon based if I'm not mistaking. That's a no-no on EPDM. As time (and sun) goes on, silicon will not stick.

John&Joey wrote:
KoolSeal is silicon based if I'm not mistaking. That's a no-no on EPDM. As time (and sun) goes on, silicon will not stick.

KoolSeal makes both acrylic and silicone based products. I used the acrylic based one and it looked good for about 4 years. I friend of mine gave it to me and no longer needed it because his new MH had a FG roof. I only had enough to apply one coat. I would use it again. I think the other brands of acrylic are similar Henry's, Heng's, Bus Cote, etc. The Kool Seal silicone based coating says it it for EPDM roofs also. The silicone based ones seem to have a longer life than the acrylic or latex based ones if you look at their spec sheets. Remember they are not pure silicone.

Liquid roof as I stated is the only true Edpm rubber product. I linked to it below I believe the second post. 20 year warranty if applied to their specs. Maybe it's 10 years.

Gjac wrote:

John&Joey wrote:
KoolSeal is silicon based if I'm not mistaking. That's a no-no on EPDM. As time (and sun) goes on, silicon will not stick.

KoolSeal makes both acrylic and silicone based products. I used the acrylic based one and it looked good for about 4 years. I friend of mine gave it to me and no longer needed it because his new MH had a FG roof. I only had enough to apply one coat. I would use it again. I think the other brands of acrylic are similar Henry's, Heng's, Bus Cote, etc. The Kool Seal silicone based coating says it it for EPDM roofs also. The silicone based ones seem to have a longer life than the acrylic or latex based ones if you look at their spec sheets. Remember they are not pure silicone.

I believe what you're saying. A friend of mine used Kool Seal about 2-3 years ago and it still looks good when I see it from my roof (as I wash it.) In all honesty it looks a lot better then my Henry's job from 2 years ago. His is nice, white, and clean. Mine is kinda dirty, graying, and thinning. Looks like I'll need another coat in a year.

BUT!!!! if you ever had a rig that used silicon on it's rubber roof as a repair job you know how that stuff just rubs off after 1-2 years of UV's. So I'm still holding back my endorsement on Kool Seal.

Thanks for the info. I have a roofer friend who does houses, but he mentioned he had done several motor home roofs with cool seal. Said his crew would clean, calk and put new seal on my roof. I am leaning towards liquid roof for RVs. He will apply whatever I want so I might go that way. I have read several articles where someone has used cool seal on RVs and it seemed okay. Will report what I decide and how that works when I get the job done.

Thanks again, Arnold

howdy35 wrote:
Thanks for the info. I have a roofer friend who does houses, but he mentioned he had done several motor home roofs with cool seal. Said his crew would clean, calk and put new seal on my roof. I am leaning towards liquid roof for RVs. He will apply whatever I want so I might go that way. I have read several articles where someone has used cool seal on RVs and it seemed okay. Will report what I decide and how that works when I get the job done.

Thanks again, Arnold

It is a matter of price, liquid rubber being more expensive. The white EPDM rubber sloughs off with time and weather, eventually the top .030 or so wears off leaving black EPDM showing. It will just make the MH hotter in the summer. Case in point my friend also has a 1996 MH also which was never coated his roof is entirely black but still does not leak. The coating will add life to your roof and reflect the sun keeping your MH cooler in the summer.

I did all front and back seams, all roof penetrations, and down the edges. 1/4 front and back. My roof was in good shape. I did it so I wouldn't have to caulk the roof anymore and take care of dry cracking edges.

I think its the best stuff out there.

I will say after a year the Liquid roof attracts more dirt then the factory EDPM roof. But it washes off no problems


See my application here.. This is what 1 gallon got me..

http://forums.goodsamclub.com/index.cfm/fuseaction/thread/tid/28923796.cfm