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Old 11-29-2015, 02:28 PM   #1
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Fiberglass roof cleaning?

My roof on my 2000 Aerbus has oxidation. I need some advice on cleaning and then sealing or polishing. Not sure what the next step is after cleaning.

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As you can see from the picture below anytime there is moisture I get white streaks on my glass.

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Thanks for any help.
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Old 11-29-2015, 05:04 PM   #2
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My '97 roof was terrible and created white streaks all over. I used a scrub brush attached to a pole and scrubbed it with oxy clean about 4 times. I then power washed it using the medium tip. It came out sparkling white and clean. After so,e research on this forum, I decided to use the Zep clear commercial floor wax on the roof. Rolled about 4 coats on it using a short nap paint roller on a pole. That was in April and so far it's been great. No white streaks and it's nice and shiny. I'm going to take a look at it this spring once it stops snowing and warms up.
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Old 11-29-2015, 05:58 PM   #3
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Dicor makes a roof cleaner that I like to use. I scrub the entire roof with the cleaner. Work on a small area (2 or 3 feet square), rinse, move to the next area. I then pressure wash as a final step. I don't try to seal, just keep the roof clean. It helps to have someone on the ground to rinse the side of the motorhome when some of the cleaner flows off the roof. It is easier to clean up the sides quickly than to remove dried cleaner.
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Old 11-29-2015, 06:48 PM   #4
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Has anyone that has used floor wax noticed yellowing over time? I have been using mop and glo for 3 years and noticed this fall that I had yellow splotches on my roof. Can't find out how much UV protection the floor wax provides.

Also does the Dicor yellow over time with UV exposure?
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Old 11-29-2015, 07:41 PM   #5
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We clean the fiberglass roof on our Tiffin Allegro Open Road with soap and water and then apply Rejex to the whole coach. We apply it in the spring and fall and I apply a fresh coat to the front of the coach before each trip. The makers of Rejex recommends cleaning the coach with Xtreme Clean which they sell to remove all of the old wax.

RejeX: Nothing Sticks but the Shine!

Most of your floor waxes are made for indoor use and won't last long.

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Old 11-29-2015, 09:22 PM   #6
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A little more than two years on our Zep application with no yellowing problem - comparing the treated areas with the untreated slide ends. And the MH sides still look good, but the roof sheen seems less so. Planning to recoat the roof soon. Still no white streak problem though.

First application prep is a lot of work, yet no regrets. I used the "High Traffic" Zep which reportedly has a higher solids content.
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Old 11-30-2015, 04:33 AM   #7
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Thank you everyone for the great info. I do appreciate it.
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Old 11-30-2015, 04:55 AM   #8
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Fierglasroof cleaning

Clean, then paint the roof. I've done that on two coaches now. That's the end of white streaks. People will say that paint is too slippery, but if that is a concern, you can put some non-slip stuff in the paint.
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Old 11-30-2015, 05:20 AM   #9
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Quote:
Originally Posted by whmprt View Post
Clean, then paint the roof. I've done that on two coaches now. That's the end of white streaks. People will say that paint is too slippery, but if that is a concern, you can put some non-slip stuff in the paint.
That's interesting. What kind of paint do you use?
Thanks
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Old 12-01-2015, 04:49 PM   #10
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EDPM Coatings makes a product similar to Rino Liner that is used in truck beds. It is applied using a roller. I am going in that direction as it also acts as a sealant and insulator. I believe it cost about $80 per gallon. Came a cross a guy on the internet who applied it to his class A, he seems real happy with the results.
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Old 12-02-2015, 09:04 AM   #11
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The fiberglass roof of my coach had extensive mildew and mold problems. Last spring I spent two days cleaning it with ZEP mold and mildew remover, and Barkeepers friend on the stubborn spots. When I got it about as clean as I thought that I could, I put 5 coats of ZEP High Traffic Floor Polish on using a sponge mop. I have noticed recently that there is a very slight yellowing of the surface, but on the roof it is OK, and rain washes it a lot cleaner than it did before, and the brown streaks are almost completely gone.
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Old 08-11-2017, 08:06 PM   #12
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Originally Posted by whmprt View Post
Clean, then paint the roof. I've done that on two coaches now. That's the end of white streaks. People will say that paint is too slippery, but if that is a concern, you can put some non-slip stuff in the paint.


What kind of paint did you use and how did you install it ?? Roller or spray ??
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Old Today, 07:09 PM   #13
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I've got one year on zep, no yellow yet, nice glossy finish.
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Old Today, 07:10 PM   #14
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I've got one year on zep, no yellow yet, nice glossy finish.

Also, I didn't zep the general walking area. Don't need a slippery surface helping me off the top
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