| RTV? [message #182322] |
Wed, 29 August 2012 20:34  |
Darryl
Messages: 144
Registered: December 2011
Location: Northern California
Karma: 0
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I'm about to install a rear-view camera system ($200 from Costco On-Line) which means I've got to poke a couple of holes in the roof which I hate to do. I want to seal them with some kind of RTV but I find that "RTV" is a very broad term (silicone, acrylic, etc.) and I can't find any consensus of what to use. Some say never use silicone, others say it's OK. 3M 5200?
What works best?
Darryl Meyers
1978 Eleganza II
El Dorado Hills, CA
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| Re: RTV? [message #182323 is a reply to message #182322] |
Wed, 29 August 2012 20:42  |
John Sharpe
Messages: 489
Registered: February 2006
Location: Texas
Karma: 1
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| Quote: |
I'm about to install a rear-view camera system ($200 from Costco On-Line) which means I've got to poke a couple of holes in the roof which I hate to do. .........
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I avoided that by mounting the camera inside. Mounted mine in the top center of the rear window, aimed through the glass and between the shade and glass. Very inconspicuous and no holes in the roof.
John Sharpe
Humble,TX
'78 Eleganza TBI
'89 Spectrum 2000 MPI V-10
'40 Ford Panel Delivery TPI
johnasharpe@gmail.com
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| Re: RTV? [message #182324 is a reply to message #182323] |
Wed, 29 August 2012 20:45 |
Darryl
Messages: 144
Registered: December 2011
Location: Northern California
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John
Thanks. I don't know why I hadn't considered that. I'll take a look before I start drilling holes and see if that will work. Seems like it should.
Darryl
Darryl Meyers
1978 Eleganza II
El Dorado Hills, CA
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| Re: [GMCnet] RTV? [message #182327 is a reply to message #182326] |
Wed, 29 August 2012 21:12 |
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ljdavick
Messages: 3548
Registered: March 2007
Location: Fremont, CA
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Like Dan says - without pictures it didn't happen!
Larry Davick
On Aug 29, 2012, at 7:08 PM, Mark <mark@habcycles.com> wrote:
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> I put mine on under the license plate light - gives me a really good angle when I'm backing up (so I can back over a Prius squarely without stressing the bogies). ;) I hid the hole behind the license plate (there was plenty of room to route the wire around behind there), though I did have to drill a larger hole to get the connector through. Still, the hole is hidden and was easily sealed. It's on a vertical surface, and is also out of the way and naturally protected enough (by the license plate covering it, and by the overhanging light fixture) that it probably wouldn't leak even if it wasn't sealed. Additionally, even if a few stray drops DID get in, it would just run down the inside of the rear cap and won't get anything important wet.
> --
> Mark Hickey
> Mesa, AZ
> 1978 Royale Center Kitchen
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Larry Davick
A Mystery Machine
1976(ish) Palm Beach
Fremont, Ca
Howell EFI + EBL + Electronic Dizzy
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| Re: RTV? [message #182331 is a reply to message #182322] |
Wed, 29 August 2012 22:25 |
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Matt Colie
Messages: 8547
Registered: March 2007
Location: S.E. Michigan
Karma: 7
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| Darryl wrote on Wed, 29 August 2012 21:34 |
I'm about to install a rear-view camera system ($200 from Costco On-Line) which means I've got to poke a couple of holes in the roof which I hate to do. I want to seal them with some kind of RTV but I find that "RTV" is a very broad term (silicone, acrylic, etc.) and I can't find any consensus of what to use. Some say never use silicone, others say it's OK. 3M 5200?
What works best?
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Darryl,
As to the second question: What works Best?
That discussion could go on for months....
I do (used to - pre bho) expensive boat work. I always carried four kinds of sealer (bedding compound) in my tool box.
First, 3M-5200 should never be used where removal is even considered. Even though there are bond breakers that will work in it, it is not simple and very problematic to remove.
Second, consider paintability. If you might even want to hide what you are sealing, pure silcones are out - they are not paintable. Many of the urethanes and most of the acrylics are paintable, but the acrylics typically lack flexibility.
Then, there is UV resistance. That has to be assessed on a -by material - basis but must be a serious consideration if the material is exposed to sunlight.
I realize you hoped for a simple answer. Well, I think you got one....
Put it inside the back window.
Matt
Matt & Mary Colie - Chaumière -'73 Glacier 23 - Members GMCMI, GMCGL, GMCES
Electronically Controlled Quiet Engine Cooling Fan with OE Rear Drum Brakes with Applied Control Arms
SE Michigan - Near DTW - Twixt A2 and Detroit
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I hid the hole behind the license plate (there was plenty of room to route the wire around behind there), though I did have to drill a larger hole to get the connector through. Still, the hole is hidden and was easily sealed. It's on a vertical surface, and is also out of the way and naturally protected enough (by the license plate covering it, and by the overhanging light fixture) that it probably wouldn't leak even if it wasn't sealed. Additionally, even if a few stray drops DID get in, it would just run down the inside of the rear cap and won't get anything important wet.