New metal cowl hood underside frame to top sheet sealer? - Hot Rod Forum : Hotrodders Bulletin Board
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Old 09-07-2011, 07:26 AM
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New metal cowl hood underside frame to top sheet sealer?

Ive installed a sheet metal cowl hood my 86 SS with the edp primer. The underside of the hood (the part that is bent to create the frame and strength of the hood) is bonded to the top of the hood in random spots with a rubberish sealer. Caulking?

Is it a bad idea to caulk the entire underside where the top of the hood would sit on the underside frame? For strength and to prevent the top from flexing? Also to seal all those gaps? If so, what do I use that can be painted?

The top of the hood appears straight, level, as far as my eye can tell. I thought sealing the gaps would look better but will it cause the hood to warp when it gets hot?

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Old 09-07-2011, 01:44 PM
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Quote:
Originally Posted by bubbahotep
Ive installed a sheet metal cowl hood my 86 SS with the edp primer. The underside of the hood (the part that is bent to create the frame and strength of the hood) is bonded to the top of the hood in random spots with a rubberish sealer. Caulking?

Is it a bad idea to caulk the entire underside where the top of the hood would sit on the underside frame? For strength and to prevent the top from flexing? Also to seal all those gaps? If so, what do I use that can be painted?

The top of the hood appears straight, level, as far as my eye can tell. I thought sealing the gaps would look better but will it cause the hood to warp when it gets hot?
it is panel bonding adhesive. not caulk. add more if you like. usually two part.
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Old 09-07-2011, 02:18 PM
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I don't know your hood but I don't believe I have ever seen panel bonding adhesive used like that, it is usually an "anti flutter" foam or a flexable sealer of some sort. Bonding adhesive would end up bending the top of the hood all up as the hood flexed.

Brian
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Old 09-07-2011, 02:59 PM
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Quote:
Originally Posted by MARTINSR
I don't know your hood but I don't believe I have ever seen panel bonding adhesive used like that, it is usually an "anti flutter" foam or a flexable sealer of some sort. Bonding adhesive would end up bending the top of the hood all up as the hood flexed.

Brian
maybe i stand corrected....
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Old 09-07-2011, 08:37 PM
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Quote:
Originally Posted by MARTINSR
I don't know your hood but I don't believe I have ever seen panel bonding adhesive used like that, it is usually an "anti flutter" foam or a flexable sealer of some sort. Bonding adhesive would end up bending the top of the hood all up as the hood flexed.

Brian
The spots that are already "glued" do appear to be more like a foam. Its firmly soft to the touch but dry. What you described is more like what is already on there in spots. Its a Goodmark brand hood.
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Old 09-07-2011, 10:31 PM
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Yeah, it's an anti Flutter foam. It's two part and dispensed out of a gun like tool.

Brian
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Old 09-08-2011, 08:44 PM
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I have a Bronco hood that has adhesive bonding the
frame to the hood skin. The adhesive is in about a 4 inch
strip, with about 8 inches between the strips.

I would not seal the entire frame gaps. Can't give a good
reason not to, just that the factory did it the other way...

EDIT:
Quote:
Bonding adhesive would end up bending the top of the hood all up as the hood flexed.
This quote from Brian is probably the reason the factory didn't
seal the entire frame gaps. The openings might keep stresses from
building up.

Last edited by Runnin'OnEmpty; 09-08-2011 at 08:51 PM.
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