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CF Hood - radiation barrier - heat blanket.

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Justin DuBois

Justin DuBois

Proven Member
1,748
1,488
Aug 15, 2019
Oakland, California
I looked, I did not find.

The factory under hood heat blanket is not to be found new - so I'm looking for alternatives - rolls of material - cut to shape etc.

Has anyone put a protective barrier under their hood?
What did you use?
Pictures?

Thank you
Justin
 
DEI makes a like 1/4" thick aluminum fiberglass cloth sandwich that has very strong adhesive on one side. Material can be cut to shape. I think that could work well for this.

In my case if I recall correctly I think I used DEI reflect-a-gold and this worked (when my car was a street car with an OEM shaped CF hood).
 
I second the DEI recommendation, although I don't have any CONFIRMED personal experience with it. I bought a used VIS carbon fiber hood a few years ago where the previous owner did an excellent job of lining the underside of the hood.

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While I cannot confirm the exact liner that the previous owner used, I can say that it looks suspiciously like this DEI "Form-A-Shield" product that DEI sent me a sample of awhile back (pricey though):

www.designengineering.com

Form-A-Shield™ - 42" x 48"

Capable of withstanding direct heat of up to 1400°F+, non-adhesive Form-A-Shield can be affixed directly to exhaust headers, manifolds, turbo housings, and downpipes dramatically reducing radiant exhaust temperatures.
www.designengineering.com www.designengineering.com

Here is the actual sample DEI sent me before:

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I'm sure the temperature rating is overkill, but I'm just saying it turned out really nice, particularly in appearance (I can't confirm how well it works from a heat barrier standpoint because my car has been on jack stands and I certainly haven't had any opportunities to track the car since I put the hood on:) But, the clearcoat still looks perfect, so maybe it is doing a great job after all? If DEI is too pricey, maybe consider finding an off brand of a similar product.

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talon77 said:
I second the DEI recommendation, although I don't have any CONFIRMED personal experience with it. I bought a used VIS carbon fiber hood a few years ago where the previous owner did an excellent job of lining the underside of the hood.

You must be logged in to view this image or video.


While I cannot confirm the exact liner that the previous owner used, I can say that it looks suspiciously like this DEI "Form-A-Shield" product that DEI sent me a sample of awhile back (pricey though):

www.designengineering.com

Form-A-Shield™ - 42" x 48"

Capable of withstanding direct heat of up to 1400°F+, non-adhesive Form-A-Shield can be affixed directly to exhaust headers, manifolds, turbo housings, and downpipes dramatically reducing radiant exhaust temperatures.
www.designengineering.com www.designengineering.com

Here is the actual sample DEI sent me before:

You must be logged in to view this image or video.


I'm sure the temperature rating is overkill, but I'm just saying it turned out really nice, particularly in appearance (I can't confirm how well it works from a heat barrier standpoint because my car has been on jack stands and I certainly haven't had any opportunities to track the car since I put the hood on:) But, the clearcoat still looks perfect, so maybe it is doing a great job after all? If DEI is too pricey, maybe consider finding an off brand of a similar product.

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Click to expand...
That's the business right there, i know what my next preventative maintenance upgrade will be, thanks for sharing.
 
TCB91GSX said:
This product is the ThermoTec 24x48 roll from Amazon. I’ll speak on behalf of @Vegas Smith because I copied him. Holding up well so far with 3M spray trim adhesive. Wish I would of went a little further in on the drivers side portion of the hood
Click to expand...
That material looks pretty nice. Is there a good way to measure the effects of the material in operation? I'm really curious to know how beneficial these improvements are. How do you go about testing it?
 
JeffGS-T97 said:
That material looks pretty nice. Is there a good way to measure the effects of the material in operation? I'm really curious to know how beneficial these improvements are. How do you go about testing it?
Click to expand...
The material feel is thick and well constructed. I couldn't speak in terms of performance, I should bust out the heat laser and see if there is a difference in temp on the hood right at the hump.
 
I am doing this to protect the band new paint finish. I ran my old CF hood without paint/clear coat, or heat blanket, and it deteriorated. No one thing killed it. I’m going to do a better job this time.
 
Here is a look at my old VIS racing CF hood that did not have any heat protection (aside from what was on the engine). Lots of cracks have formed:
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The black version of the blanket material is looking real nice. I am using the old hood on the table to help trim and form the raw materials.
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m1nd64m3 said:
I wrapped my o2 housing and downpipe in this stuff to keep down the heat near the alternator and fans.

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Click to expand...
The product I have includes adhesive on the insulation material, as the heat is expected to be on the metal side. If I put mine on the down-pipe like you did, the glue would probably melt, smoke or possibly catch fire.

Your product is different?
 
Justin DuBois said:
I looked, I did not find.

The factory under hood heat blanket is not to be found new - so I'm looking for alternatives - rolls of material - cut to shape etc.

Has anyone put a protective barrier under their hood?
What did you use?
Pictures?

Thank you
Justin
Click to expand...

Heatshield products makes a lava shield with adhesive I plan to consider trying. It is a bit on the expensive side depending on size and it looks like dark gold carbon. Says its good for 1200° radiant and 2000° intermediate.
 
Justin DuBois said:
Decision time - This material has some weight to it.

I have enough material to cover everything, or, as little as the OEM blanket.

Thoughts?
Click to expand...
I’d probably do the whole thing, or to save the weight maybe cut some off the rear part of the hood where heat damage is less likely.
 
The cracks were in a concentrated area. You guessed it, in the same area that the stock heat shield covers.

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I’m starting a cardboard template before I pick up the car, and loose my work space inside.
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Finally got this completed:

Big pillows and a clean sheet on a table in the driveway:
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IPA prep the surface and lay out the blanket cut using tin snips and the template
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Contour, peel and stick, and rub it down to shape
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Installed:
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One spot the adhesive wasn’t going to stay stuck, so I added some retaining clips for a little more peace of mind:
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And I took some time to cut in holes for the Washer sprayer hose retainers.
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Baring some new issue, this should be done for a long time.
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