Do you know any tank sealant can work without fully clean and dry the tank?

[oldgit]

Also need to remove any baffles to do the job properly, quite possible this is where the tank has failed .
It either the tank out or at very least the top off.
Wonder if the seller knew of the problem ?
Came past the boat a week or so ago and did wonder what had happened.

 

[BruceK]

Based on what I have seen with aluminium tanks and crevice / pitting erosion if he has one leak he will shortly have many more. Where as the tank can be repaired it would likely just happen again and it would be better to just replace in the long run. Tek tanks I understand will custom build : Plastic Tanks for Water, Waste and Fuel - Tek-Tanks

 

[Boater On Thames]

Thanks all.
Yes, the replacement could be the final solution. It just that a replacement or full inspection can only be done if I am willing to cut a large hole on the starboard side to remove the tank. That will be a big cost. So I am trying everything else even most likely will fail to seal the tank inside without moving it. Just give it a go. The leak is about 300ml pre day. And because the tank complete hiding under the bathroom, so I don't know where the leak exactly location. Just hopefully on the bottom so I can pour some sealer to seal it.

Lucky I still have a 200 gallons tank on port side. So currently okay keep using it.

 

[Sticky Fingers]

Wht niot cut the bathroom floor open. Remove the tank by cutting it up in situ and remove the parts through the hole you made. Then you have a big open empty space to work with.

As others suggest, TekTanks make custom tanks. If you need all the capacity, you might be able to fit two smaller replacements into the vacant space, through the hole in the floor.

 

[Freebee]

If you are intent on sealant frost auto restoration have several! but you need a dry tank...