Little Mold pinpoint spots on caulking before belly band - Fiberglass RV


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Old 08-29-2015, 08:25 PM   #1
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Little Mold pinpoint spots on caulking before belly band

Hi FGRV Friends,

Each season, I've had to use Concrobium to get these tiny little mold pin sized dots off the white caulking behind my scamps belly band.

She does sit outside on my driveway until storage in October, but aside from the Concrobium stain remover, is there anything you've used to effectively seal that caulk so they don't keep coming back?

I do have a cover, but live alone and it's hard to put on without some help. I'm going to do the Concrobium tomorrow and give her a little bath. If the cover will work for now I'll put it on with someone's help, but I camp frequently when I do so it would be kind of a pita to keep putting on and taking off. Is there some type of sealant that would sort of "close the pores" of the caulking?

Much obliged,
Wendy


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Old 08-30-2015, 12:52 AM   #2
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Hi Wendy,

Am very curious to know if there's a solution to this problem, so I hope someone chimes in soon!

Best,
LP
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Old 08-30-2015, 02:11 AM   #3
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Wendy, is this a silicone caulk you're talking of? If so I do believe there is a mold resistant one you can replace it with.
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Old 08-30-2015, 06:50 AM   #4
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I'm not sure Dave. It is what scamp uses right from the factory. It is white. Happy to take a pic if that would help.

Since Scamp uses clear silicone around their windows I would assume this is a white version of the same. At any rate, the little mold or mildew spots are annoying. This will be the second time this year I've used Concrobium. It works great, but ugh!


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Old 08-30-2015, 07:30 AM   #5
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Wendy, I would change caulks. Some have a mildewcide and don't mold over time.


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Old 08-30-2015, 07:35 AM   #6
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Shrimp Scampi is moldy! Click image for larger version

Name:	ImageUploadedByFiberglass RV1440938045.594799.jpg
Views:	11
Size:	38.6 KB
ID:	88225. How do I get this stuff out of there? Makes me nervous with the belly band and FG gelcoat right there.


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Old 08-30-2015, 09:34 AM   #7
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Same issue with our 2014 Scamp that sat outside between trips.

I used a mild solution of beach 1:6 part to water, let sit 15 minutes or so then hosed it all off. Initially it was fairly heavy so used a DT (discarded toothbrush) to lightly scrub some these areas.

More than a bit concerned with the oxidation cased by the chlorine and it may damage the silicon.

I need to look for and try the Concrobium

In any case this adds a whole new meaning to the "Molded" part of the fiberglass trailer forum LOL
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Old 08-30-2015, 11:10 AM   #8
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GE Silicone II now has a 7 year mold-free version of their silicone caulking. I bought a tube at Walmart.
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Old 08-30-2015, 11:13 AM   #9
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Ha ha! Very funny pun, Batdude. If you have a Home Depot near you, Concrobium Mold Stain Eraser is there. You mix it in a pail with hot water. Directions say pump sprayer but I just used a hand pump bottle I recycled from another use. Has to sit 3 hours out of direct sun. Then rinse and wash again.

I just finished the treatment for now and after washing and drying I'm going to put the cover back on to see if it helps for now. As I said earlier, I rarely have help so putting cover on between camping trips would be a pita. I'm hoping somebody with experience teaches me how to get that caulk out without damage. Replacing with a caulk that has a biocide/mildewcide might be the ticket.

I did everywhere this time as it's all around my windows and fantastic fan caulk outside. I googled for some type of paint on sealant that would close the pores of the caulk, but I obviously made it up in my head as no such product exists. 😬


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Old 08-30-2015, 11:34 AM   #10
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Quote:
Originally Posted by CampyTime View Post
Hi FGRV Friends,

I do have a cover, but live alone and it's hard to put on without some help. I'm going to do the Concrobium tomorrow and give her a little bath. If the cover will work for now I'll put it on with someone's help, but I camp frequently when I do so it would be kind of a pita to keep putting on and taking off. Is there some type of sealant that would sort of "close the pores" of the caulking?

Much obliged,
Wendy


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I'm no help on the mold, but I did read somewhere that an easier way to get the cover on by oneself is to use a step stool and a push broom. You hook the cover on the hitch and then get the broom up under the back end of the cover and walk around to the back, dragging it across the top. A step stool can aid in getting it over the middle part. My husband uses a broom without the step stool when I don't go with him to take the Scamp back to storage
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Old 08-30-2015, 11:58 AM   #11
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Thank you, Emij. I'll try that today by myself after she's washed and dried. I am not going to get at the silicone removal this season as work is upon me now, but again, if someone has ever done this I'd be willing to try it.


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Old 08-30-2015, 12:00 PM   #12
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Thank you, Captleemo. I read about that GE 7 year silicone this am. Sounds like fabulous stuff. Now if we could only get Scamp to use it so new trailer buyers won't have to fuss with this issue! 😬


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Old 08-30-2015, 02:49 PM   #13
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Originally Posted by emij View Post
I'm no help on the mold, but I did read somewhere that an easier way to get the cover on by oneself is to use a step stool and a push broom. You hook the cover on the hitch and then get the broom up under the back end of the cover and walk around to the back, dragging it across the top. A step stool can aid in getting it over the middle part. My husband uses a broom without the step stool when I don't go with him to take the Scamp back to storage
I've managed to do something similar without a step stool or a broom, but I'm using a slick nylon rainfly set up as a temp awning for shade. Tie or hook or bungie one corner to one side or wheel well or nearby tree or fence, then tie or hook or bungie another corner with a line to hold onto as you walk around... the middle should slide up and over. Then the individual corners can be pulled out and down (in my case pulled out to tent poles and staked down).

Your cover would be a bit more complicated to get over your vent, so a broom and step ladder would probably be necessary there, but I bet you could do the rest from the ground by yourself. If your cover doesn't have grommets to hook or tie onto, these little guys would help. (I use them to stretch out and stake down a strip of outdoor carpeting so no one trips over the edges.)

Good luck with your mold problem! I hope you're able to sort it out.

Best,
LP
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Old 08-30-2015, 04:54 PM   #14
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I have had good luck using Tilex to remove those mold spots. I try to treat it when I'm washing the RV and use an old toothbrush to scrub it a little bit before rinsing it off.
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