Gas tank replacement

[danst46]

Good day
I am replacing my fuel tank on my boat, which is completely encapsulated in a foam type of product.
I have removed the foam to release the tank and now I need to install the new one. Can you tell me what type of foam I should use and where to get it?
Please help
Dan

 

[gcboat]

Re: Gas tank replacement

It is usually an expandable type. BE VERY CAREFUL using it. The factory set up uses this same product under pretty strict guidelines and control. Use too much and the chances are pretty good you'll either warp, contort or break something. When I say expand - I mean it !!! It does produce a lot of pressure on the surrounding area.

 

[tashasdaddy]

Re: Gas tank replacement

it totally depends on the type tank you are installing. must recommend 1/2 in clearance. to allow for expanding. follow the mfgrs recs.

 

[danst46]

Re: Gas tank replacement

Yes but where di I get it? and what is it called?

 

[gcboat]

Re: Gas tank replacement

There are two ways to purchase. One would be from a local marina, purveyor - whatever, and buy the two part that you mix. The other would be from a big box store such as Home Cheapo, Lowes, Ace, etc. From the stores it would be labeled as 'Great Stuff' or something along that line. Great Stuff is used mainly for home use as an expanding sealant foam for window replacements, door replacements. I have absolutely NO idea if it will work for your situation. Might do a Google search on that. The two part foam is made for that particular application. Might even try a WM store.
Again, be advised that this stuff really does expand so plan accordingly.

 

[reelfishin]

Re: Gas tank replacement

On the last one that I replaced, it was sealed in with foam from the factory but the foam had held water and pitted the aluminum tank through, when I installed the new tank I cleaned out the entire well, made up under supports out of wood and glassed them in, then used aluminum straps to secure the tank in place. When I cleaned out all the foam, and finished glassing in the lower supports, I painted the enitire well with epoxy paint and left it open, I can now clean out around the tank and check for any future corrosion with ease. The only places that the old tank was pitted was where the wet foam sat against the tank. The only wet foam was around the tank, it had leaked in around the access plates in the floor.

 

[sea wolf]

Re: Gas tank replacement

I don't think expansion will be a problem since u have the deck off. Just let it cure & cut off the excess. Don't bother with Great Stuff. It will cost u a fortune, as you'll need a few cans of the stuff, & anyway it soaks up water like a sponge. Do a search here for foam & follow the link for the proper stuff to use & where to order it from.

 

[andy6374]

Re: Gas tank replacement

www.fgci.com
www.uscomposities.com

Factories used 2lb density foam during installation.
Make sure it is at least 70 degrees when your pour and wait about 20 minutes inbetween pour to allow for full expansion.

Make sure you coat the tank if you want to last for a LONG time. Remember the tank is metal and you can't just slap primer and paint on it and expect it to stick. You'll need to properly prepare the metal, use a self-etching primer (like a zinc chromate), then use your favorite primer, paint.

 

[watermellonI]

Re: Gas tank replacement

and another thing, the stuff in the can, spray foam is not cg approved