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Old Yesterday, 02:50 PM   #1
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Silicone/Sealer recommendation for sealing wiring harness leak in roof

Need to remove old silicone Silicone/Sealer that is not keeping water out. Any recommendations on type of Silicone/Sealer for sealing wiring harness leak in fiberglass roof?
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Old Yesterday, 07:59 PM   #2
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Try Sikaflex - on Amazon - black color - pretty sticky, gooey stuff ! Use but don't overuse as it is messy !
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Old Yesterday, 09:40 PM   #3
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Many in the RV community use Dicor self-leveling lap sealant on around roof fans, AC units, solar wires etc… anywhere there is a potential leak or to repair an existing leak. It comes in white or black (and leveling or non self-leveling). Some say to use black only, even on a white van, as the white product gets dirty and yellows with age. I used it on my transit roof as a preventative measure to cover the the bolt hole roof caps that are on these vans.
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Old Today, 08:45 AM   #4
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3M 5200 is hard to beat but it is a permanent solution.
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Old Today, 10:07 AM   #5
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another resource - https://www.sportsmobileforum.com/fo...ons-18369.html

this is what we've used on our van because we prefer zero-to-low VOC's:
https://chemlink.com/product/m-1-uni...esive-sealant/

and where to buy - https://store.concreteexchange.com/p...dc8a3757&_ss=r

we've used chemlink M-1 to mount l-track to the penthouse roof, to seal the weld mounts (t-nuts) before coating the penthouse with monstaliner, to attach awning brackets to the body, to attach weld mounts to the penthouse for mounting lights + camera, to seal body cracks, etc.

other options in the zero-to-low VOC realm:
https://www.greenbuildingsupply.com/...ants-Adhesives
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