Foam

[SBD]

What density of foam is used for foam installation of a fuel tank.

I am aware of all of the pros/cons of foam, just trying to figure out what type is used for this job.

Thanks!

[dbiscayne]

i've poured both 2 & 4 lb/cf foam and the foam I pulled out of my boat around the tank sure felt like 2 lb/cf.

[wtenglish]

I believe 4lb is what was recommended to me by the supplier.

[GodsReel]

does your tank have flanges on it? why foam? if you do foam, put a thin layer of pvc board between the foam and tank so no moisture can transfer.
just my 2 cents.

[pelican]

if,you properly chemically etch primed the aluminum,and coated it in interprotect,the proper thickness-10mils,then,aluminum is completley isolated from any and all moisture contact - no need for a barrier between the tank and the foam...

[Old'sCool]

Why add foam in the first place?