06-01-2018, 12:10 PM
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#1
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Roof Rack Sealant? Need Advice
I need input on whether sealant is necessary when re-attaching factory rails.
I pulled my rails off to have them powder coated. As I was about to put them back on I noticed the rubber/foam pads on the rails were worn/incomplete (see pics below). I'm wondering if I should:
- leave it alone and assume whats there will do the job.
- seal with some silicone (e.g. DAP marine grade mentioned elsewhere on the forum)
- seal with an adhesive (e.g. E6000 mentioned elsewhere on the forum)
- seal with a thin rubber seal (another thread mentioned that Gobi provides these with their rack).
- some combination of the above
I'm hoping to put the rails back on this weekend but will be pulling them off in a few weeks when my Rago crossbars arrive. I mention this as I'm not sure if the short term/long term solution are the same.
Thanks in advance for the suggestions.
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06-01-2018, 12:21 PM
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#2
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What’s your weather forecast like?
I ask cause I installed and uninstalled several racks in a short period of time and used silicone because it was over winter. If I did it again I’d use rubber until I had a permanent setup, then use silicone, especially if there was no rain in the future. The silicone pulled some paint off and I had to spend time cleaning the roof of it and touching the areas up, big pain in the rear.
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06-01-2018, 12:32 PM
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#3
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Quote:
Originally Posted by JSparky
What’s your weather forecast like?
I ask cause I installed and uninstalled several racks in a short period of time and used silicone because it was over winter. If I did it again I’d use rubber until I had a permanent setup, then use silicone, especially if there was no rain in the future. The silicone pulled some paint off and I had to spend time cleaning the roof of it and touching the areas up, big pain in the rear.
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Interesting to hear about the silicone.
Weather here will likely be 85-95, with some rain, I’m sure, but not likely days of rain. Your experience makes me lean rubber seal until I get the cross bars.
Sent from my iPhone using Tapatalk
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06-01-2018, 12:37 PM
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#4
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I used this when I re-installed my roof rails after powder coat.
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*2017 4R TRD Pro, 01H5 Cement w/ Shrockworks dimpled tread plate sliders, Moroso oil catch-can, black powder-coated roof rails. (summer runner).
*2005 4R Sport Edition w/ Bilstein 5100's, Gen-5 brake upgrade, K&N cold air intake, cabin air intake mod, Falken Wildpeak AT3. (winter runner).
*1965 Pontiac GTO convertible, 4-speed w/tri-power, PHS documented. (born in Freemont CA).
*1962 Chevrolet C-10 (short-step) pickup, 4-speed, survivor. (born in Oakland CA).
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06-01-2018, 02:57 PM
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#5
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Quote:
Originally Posted by wsgoat
I used this when I re-installed my roof rails after powder coat.
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That's good stuff.
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06-01-2018, 03:07 PM
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#6
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I used black RTV 100% silicone when I reinstalled mine, no water issues at all. The rubber on the bottom would probably be fine but you can see where the factory had some form of sealant on there as well which is why I cleaned that and put some back.
I’ve never personally heard or seen silicone pulling off paint unless it was already chipped? Not saying I don’t believe the individual who said it happened to them just seems weird.
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06-01-2018, 04:54 PM
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#7
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Definitely
Quote:
Originally Posted by DreamsOfDirt
I need input on whether sealant is necessary when re-attaching factory rails.
I pulled my rails off to have them powder coated. As I was about to put them back on I noticed the rubber/foam pads on the rails were worn/incomplete (see pics below). I'm wondering if I should:
- leave it alone and assume whats there will do the job.
- seal with some silicone (e.g. DAP marine grade mentioned elsewhere on the forum)
- seal with an adhesive (e.g. E6000 mentioned elsewhere on the forum)
- seal with a thin rubber seal (another thread mentioned that Gobi provides these with their rack).
- some combination of the above
I'm hoping to put the rails back on this weekend but will be pulling them off in a few weeks when my Rago crossbars arrive. I mention this as I'm not sure if the short term/long term solution are the same.
Thanks in advance for the suggestions. |
Use RTV, silicone based or not doesn't really matter. I tried to leave it alone the first time and had to go back. It leaks through the threads so Gobi's seal is not sufficient since it doesn't seal the screw threads.
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06-01-2018, 08:09 PM
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#8
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Another vote for RTV. That's what I used when installing my ARB rack and no leaks in two years
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06-01-2018, 10:00 PM
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#9
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Quote:
Originally Posted by CollinJ
I used black RTV 100% silicone when I reinstalled mine, no water issues at all. The rubber on the bottom would probably be fine but you can see where the factory had some form of sealant on there as well which is why I cleaned that and put some back.
I’ve never personally heard or seen silicone pulling off paint unless it was already chipped? Not saying I don’t believe the individual who said it happened to them just seems weird.
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It was weird I agree, but it definitely happened. Occured when pulling up the metal spacer plates that are used on aftermarket racks. Unfortunately no photos. When I uninstall the factory rack again I can take some.
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06-01-2018, 11:13 PM
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#10
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Quote:
Originally Posted by JSparky
It was weird I agree, but it definitely happened. Occured when pulling up the metal spacer plates that are used on aftermarket racks. Unfortunately no photos. When I uninstall the factory rack again I can take some.
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Depending on the silicone it can release acetic acid when it cures. Then you also may have dissimilar metals in contact. That's a good recipe for problems.
Permatex RTV
TYPICAL CURING PERFORMANCE
Permatex
Clear RTV Silicone Adhesive Sealant cures on
exposure to moisture in the air. The product cures tack free in
1 hour and fully cures in 24 hours. Cure times will vary with
temperature, humidity and gap. Note: The curing process can
cause corrosion to some surfaces, for critical applications use
the Ultra Series silicones.
Last edited by tb-av; 06-01-2018 at 11:36 PM.
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06-02-2018, 12:10 AM
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#11
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I'd use the sikasil vs RTV or other silicone
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06-02-2018, 01:26 AM
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#12
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I used Marine Goop about 7 years ago and it has not leaked yet.
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06-02-2018, 08:51 AM
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#13
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Any pictures of the installed powder coated racks?
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06-02-2018, 10:34 AM
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#14
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Lot of glare in the pic....cost 50-bucks to have both rails powder coated. I went with a semi gloss to match the factory trim.
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*2017 4R TRD Pro, 01H5 Cement w/ Shrockworks dimpled tread plate sliders, Moroso oil catch-can, black powder-coated roof rails. (summer runner).
*2005 4R Sport Edition w/ Bilstein 5100's, Gen-5 brake upgrade, K&N cold air intake, cabin air intake mod, Falken Wildpeak AT3. (winter runner).
*1965 Pontiac GTO convertible, 4-speed w/tri-power, PHS documented. (born in Freemont CA).
*1962 Chevrolet C-10 (short-step) pickup, 4-speed, survivor. (born in Oakland CA).
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06-02-2018, 10:42 AM
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#15
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When I removed mine for painting, I used ARP liquid thread sealer on the bolts, nothing more, no leaks and we've had some intense storms here since. I think this is one of those things people tend to over think.
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