thermal barrier on inside of firewall

[BoyRacer]

I would like some ideas. The original material installed on the inside of the firewall, above the airbox/heater chamber, was some kind of a tar paper type of product. I would like to put a good thermal barrier in this area. There are so many holes, grommets, captive nuts, etc, that makes this project a bit vexing. Has anyone come up with a good way to insulate this area in clean and tidy way?? Any vendors selling a simple fix? Any other ideas?

Or, am I worrying too much about heat even coming through this particular area? I already have the foot-well heat problem under control.

 

[healeyblue]

I used the Eastwood (dynamat extreme equivalent) sound deaden-er. Of course it went on before anything else was there. If all the cables and wiring is already in place, it would be difficult as this stuff sticks very quickly. I do not get any hint of engine bay heat in the car. I covered the lower portion with some matching blue vinyl as the interior so the silver would not be visible, the rest gets covered by carpeting.
JIM

 

[stretchit2]

I used Heat and Tunnel Shield from Design Engineering with great success!


https://www.designengineering.com

 

[CanberraBJ8]

I did mine a day or two ago with Dynamat. It wasn't such a pain. I used the existing tarred cardboard liners that were there (had to make a couple of cuts to separate it from the fire wall due to existing cabling). Then I used them as templates. They hadnt stuck well to the firewall and were too hard to pull off intact. If you keep the sections of the dynamat down to a 12" max size, then its not to difficult to get it up to the firewall without tangling up. I have half of the dash out though - just the wood section with the instruments still in place.

 

[andrea]

I have used a insulation material very similar to Dynamat (easy to find in Italy), glued it on the firewall, and then I have glued UP the original tar paper,
easy to cut the necessary holes and better insulation capacity, original appearance if someone put his head under the dash
Cheers

 

[HealeyRick]

When doing this, it's helpful to shine a work light inside the engine compartment. Once you're under the dash, the light will shine hrough the open areas that you might have missed. Some rope caulk ("dum dum") will help fill in those areas with odd configurations. Pay attention to where the wires come through the grommets as well. Any open space can let in a lot of hot air.

 

[Randy Forbes]

I have no experience with the product, but https://www.lizardskin.com/ can be spayed on. Certainly worth looking into.