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06-20-2022, 07:44 AM
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#1
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Senior Member
Join Date: Aug 2020
Posts: 185
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Roof Coating For a Fiberglass Roof
I'll post this here also, as it's probably more appropriate. What have you used on your fiberglass roof as a coating, and how well has it worked out?
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06-21-2022, 05:52 AM
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#2
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Senior Member
Monaco Owners Club Vintage RV Owners Club Holiday Rambler Owners Club
Join Date: Jul 2012
Location: Lexington, SC
Posts: 2,818
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Here's an old thread on this topic. Many have use the Rustoleum product with good results, but there are others available. Search IRV2 on each product mentioned in this post, and you'll get more info.
https://www.irv2.com/forums/f258/rec...ng-524389.html
__________________
Vera & Ken
1998 Holiday Rambler Imperial, RR8S Chassis
Cummins 6C8.3 mechanical engine, 325HP, 3060 Allison
Towing 2014 Ford Explorer
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03-07-2023, 02:46 PM
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#3
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Junior Member
Official iRV2 Sponsor
Join Date: Mar 2023
Posts: 7
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What ever roof coating you choose it should be noted that prep work and primer application is crucial to successfully coating fiberglass. The surface should be well sanded to remove all shine and roughen the surface for a better bond. Clean the surface well and before application of any primer, wipe the surface with a white rag dampened with acetone. This will remove fine dust from the surface as well as any residue left from the cleaning process. It will also evaporate almost immediately and leave no residue.
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03-07-2023, 06:02 PM
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#4
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Senior Member
Join Date: Jan 2011
Location: Wandering below the Gnat Line
Posts: 2,006
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Why do want to coat the roof?
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-jbh-
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03-07-2023, 06:21 PM
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#5
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Senior Member
Join Date: May 2018
Posts: 3,204
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I went back and forth with this and did a lot of research and concluded that fiberglass makes the best surface when properly maintained so I just buffed it out and waxed it with Marine wax. The penetrations are sealed with a self leveling product like Dicor. My edges are are painted for about 4" and was peeling so I stripped and repainted the edges with base coat/clear coat automotive grade paint shot with a $35 HVLP gun from Amazon, came out great.
One argument to keep it fiberglass is once you coat it with something now you have to maintain that coating and re-do as needed.
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Brian, 2011 Winnebago Via Class A on Sprinter Chassis
2000 Jeep TJ toad
Tucson, AZ
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03-09-2023, 08:13 AM
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#6
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Senior Member
Join Date: Aug 2021
Location: Maine
Posts: 331
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I would treat a fiberglass roof like a car or boat. I would paint it and wax it. Mine needs it but it won't happen this year. The chalky fiberglass is probably fine as is but I think some paint would make it last longer. Mine is already 35 years old and I can't tell if it was ever painted.
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1986 Itasca Sunflyer 22 ft P32 chassis with 454 engine
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03-09-2023, 09:41 AM
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#7
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Senior Member
Join Date: Jul 2018
Location: Southeast Texas
Posts: 1,721
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Poli-glow
__________________
1998 HR Endeavor Cummins ISB 275 / Banks Allison 3060
20014Jeep Wrangler JKUR with M&G air brake with breakaway
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03-12-2023, 05:50 PM
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#8
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Senior Member
Join Date: Mar 2019
Location: Braidwood Il.
Posts: 8,300
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Most popular ,if getting chalky and micro pits is Rustoleum Topside paint. There are probably 50 threads using it. You can find Some boat and RV ers have used modest amount of generic clear hardener in it. I think Dicor sells similar for FG also. You can find more durable 2part marine topside paint if you pay more ,those may need primer.
__________________
95 Monaco Crown Royale
M11 400hp, 4060 trans.
Aquahot, Generac Guardian7.5k
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03-12-2023, 06:13 PM
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#9
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Senior Member
Winnebago Owners Club Workhorse Chassis Owner RV Trip Wizard
Join Date: Oct 2019
Location: Killen, Alabama
Posts: 364
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When we got our "new to us" 2004 Itasca several years ago, the fiberglass roof had a number of dings that I assumed to be some sort of hail damage. The roof appeared to be in really good shape otherwise with no soft spots, delamination or signs of water intrusion. I decided to clean the surface and apply two coats of Dicor Fiberglass RV Roof Coating and have been extremely happy with the results. All I've done since then is to wash it two or three times per year and i fully expect it to last for the life of the coach.
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2004 Itasca Sunrise 34D, 8.1L, Workhorse W20 Chassis
2023 GMC Canyon AT4, NSA Ready Brute Elite II, BlueOx Base Plate
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