Forum Discussion

Williebago's avatar
Williebago
Explorer
Jan 21, 2020

firewall, black expanding foam

After driving with our new gas class A in 20 degree weather have some minor leaks in the front firewall creating some minor comfort issues that just can't be resolved by the dash heater controls. I want to work on some of these infiltration leaks, but I don't want to use a flammable foam, so what do the manufacturers use for the black expanding foam in this application?
Class A
  • ScottG's avatar
    ScottG
    Nomad
    Jan 21, 2020
    Black will burn. You can use fire-block foam which will even take a direct flame. OTOH, even the black or white "Stuff" is good for around 240 degrees and I doubt it will see those kinds of heat.

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