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Gas Tank Foam

Old 01-31-2002, 11:21 AM
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Post Gas Tank Foam

Is urethane packaging foam the same stuff used to mount gas tanks?

Thanks Rob
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Old 01-31-2002, 02:10 PM
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No,

It will absorb water as well as fuel. What you are looking for is Coast Guard foam. Not sure where to get it. Be carefull working with the CG foam. When it expands it does so with great force. I have seen floors puckered up from too much of it.
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Old 01-31-2002, 02:25 PM
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rws- look at the link I posted under "reinstalling a gas tank" or something like that. It suggests other methods.
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Old 01-31-2002, 02:32 PM
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Thanks
I was just trying to do it for nuthin!!

Rob
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Old 01-31-2002, 08:03 PM
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rws Faoming in the gas tank is a little trickey. You do need to use a polyurethane foam that is gasoline and oil resistant.
You should give your boat manufacturer a call and see what they use, and maybe they will sell sell you some of it or at least tell you what the latest stuff is.
The last time I used the stuff it was a two part process. On the material I used the mix was one to one, you had to be careful not to mix up too much of the stuff it doubles or triples itself in volume.
You also need to space the tank off of the bottom of the hull by putting spacer blocks under the tank to act as a cushion for the tank to ride on. I actually anchored the tank down so it would not move when the foam was kicking.
Like all new tecknology things are changing every day and I'M sure the polyurethane tank foam has changed that is why I feel you should call your boat manufacturer to see what they are using currently for gas tanks.
Good Luck

[ 01-31-2002: Message edited by: Big boys Toys ]
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Old 02-01-2002, 08:50 AM
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Boater's World used to sell the two part foam mix. As cpqtim said, be careful with it. It can crush your tank when it expands. Do a little at a time.
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