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Old 05-10-2013, 03:02 PM   #11
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Re: Sealing around SMB screws that penetrate the van underbo

I'm guessing the red stuff you referred to is RTV, commonly used as a gasket/sealer with radiator fittings, oil pans, etc. (room temperature vulcanizing silicone II IIRC). Would work but you don't want silicone.

If it's just new metal then why not just paint it? Prep, primer, paint of your choice. I've had good success with most of the Rustoleum or comparable stuff.

Things like POR-15 and Chassis Saver are designed to work on old metal, apparently mechanically. You'd probably need to rough up the stuff really well which is hard to do with little inaccessible bits. Some of the rubberized type stuff might work better in this application.

I've actually had more trouble with mice getting in through holes left by SMB than rust, so check for that while you're under there. Routes up into the pillars were the preferred entry.

Rob

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Old 05-13-2013, 10:43 AM   #12
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Re: Sealing around SMB screws that penetrate the van underbo

Quote:
Originally Posted by skijunkie
....I definitely do not want to use silicone. I saw a post before where the guy used this red putty looking substance to fill around hoses when he added a propex heater but can't find the thread anymore....
I think that was my Propex. I used high temperature RTV to seal the tubes since the exhaust gets hot.

I don't worry about corrosion on those small holes since Ford uses zinc primer, which should heal over small areas of cut metal. However I do live in a very dry climate so rust isn't a problem anyhow.
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