If it is a welded aluminum tank why the need to slosh?

I understand the wett wing riveted ones like the RV need it but if it is
welded it should not need it. Or am I way off base here?

is there something in the fuel that affects the aluminim and thus the need
for a sealer?

I did try to braze up my tank .050 5250 with Alumaweld and it was a fiasco.
Because you only use a map or propane torch with the Alumaweld you can not
concentrate the heat enough and on la large surface like a fuel tank the
heat dissipates to quickly. End result is you wind up heating to much and
melting the aluminum which makes a mess and is un manageable.  The Alumaweld
does work well for smaller thicker pieces that you can heat up well with the
propane torch without damaging. This is how I made the intake for my 3
Mikunis.

I wound up having my tank tig welded by a pro so it was done right. It was a
150$ well spent.

Michael in Maine




----- Original Message -----
From: "Charlie England" <ceengland@bellsouth.net>

> Caution: if you didn't thoroughly clean the entire inner surface to prep
> for the 'slosh', it will likely peel off in sheets at some future date.
> Many RV'ers have had to cut open their tanks to remove peeling sealant.
>
> If it's a welded tank, have you thought about trying something like
> 'Alumiweld'?
> http://www.alumiweld.com/h2uaw.html
>
> It's actually a type of brazing or soldering for aluminum, since you
> don't melt the underlying structure.