early 80's water tank is weeping, anyone have experience with potable water sealant? Unable to remove/ replace existing tank due to location.
What model, length etc? A number of posts on 41/410 tanks, amazing what you find when you look.
There's always a way to get a tank in or out but some dismantling is required.
An alternative would be to install a blatter inside of the old tank .
Here's a link to such an example
https://www.atlltd.com/industries/marine/below-deck-fuel-water-bladders/water-bladders