42 year old tank....

[Jbristol]

Could you please share the cost of the repair, I have the same problem with our port 300 gallon tank,

Thank you

 

[High Wire]

So is that membrane or paint on stuff?

 

[Dave_E]

See posts above with pictures

 

[Dave_E]

So is that membrane or paint on stuff?

Sealant, same stuff (real close) they use in aircraft wings to keep them from leaking.

 

[88FuHwa]

I actually never fixed it. I found out that the leak is higher up somewhere and I can fill the tank half way without a drip. Not the best solution but at least our boat does not list as much anymore.
I kept the two part epoxy that is used for aircraft fuel tanks just in case.

 

[Brooksie]

Repaired welded steel tank in my lobsterboat using Por15 and Por Paste.
Weeping at a rusted bottom weld. Repaired from the outside. That was 15 years ago and still fine

 

[FF]

IF someone is replacing fuel tanks DIY , they will save the huge labor cost.

Monel with a sump would be #1 construction material ,

If just a box for fuel plastic would be #2 choice.