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Airbox to firewall gasket material?

Old 01-14-2019, 12:04 PM
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Car: 1986 Trans-Am
Engine: 305 4BBL
Transmission: THM 700 R4
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Airbox to firewall gasket material?

Does anyone know where to obtain the seal that is basically taped to the air boxes that seal the heater core and A/C boxes to the firewall? I've been googling for quite some time and everything I have found is very porous foam tape whereas the factory seal is more like a rubberized dense foam.

Thanks in advance for any suggestions.
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Old 01-14-2019, 01:38 PM
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Car: '91 GTA, '92 T/A Convertible
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Re: Airbox to firewall gasket material?

I couldn't find anything a few years ago when I had to replace the evaporator core housing. I ended up using some 3M strip caulk. Works pretty good.
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Old 01-14-2019, 03:32 PM
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Re: Airbox to firewall gasket material?

I used the Strip caulk as well.
Worked great
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Old 01-18-2019, 07:32 PM
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Re: Airbox to firewall gasket material?

You can find foam and butyl tape at the hvac supply house.......imagine that, sealing up the hvac box with hvac parts lol!
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Old 01-19-2019, 06:03 AM
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Join Date: Jul 2009
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Car: 1986 Trans-Am
Engine: 305 4BBL
Transmission: THM 700 R4
Axle/Gears: 2.73 Stock
Re: Airbox to firewall gasket material?

Sadly, I never thought of googling for hvac foam rubber gasketing tape. I think that may actually be the way that I try first.

Thanks for the suggestions everyone.
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