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Old 08-26-2017, 03:28 PM   #1
Chevy1966
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Join Date: Nov 2011
Location: San Luis Obispo, CA
Posts: 198
Firewall Sealant Mystery Stuff

Does anyone know what kind of spray on sealant GM used to seal the firewall around the heater box and other grommets? It's clearly something that was sprayed on but it is definitely fairly thick. Of course there are various sealant that will do the job, but I am trying to keep my engine compartment looking original. Thanks for any info!
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