View single post by Esprit2
 Posted: 12-01-2005 05:11 am
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Esprit2

 

Joined: 05-01-2005
Location: Minneapolis, Minnesota USA
Posts: 575
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 Regular foam like carpet padding isn't a good choice for under the tank since it's porous...  a sponge.    It will absorb and hold moisture against the metal tank.  If you can blow through it,  don't use it.

Use a closed cell foam like ethylene (EthaFoam is one brand) or a closed cell urethane.   I like the ethylene foam since it's inert and won't react long term with anything that's likely to contact it in a car.

Good luck,

Tim