Leaking tank

[Bartman]

Originally Posted by johnny rock

use razors blades and lots of them, then use a acetate or vinegar to really clean any residue off. It has to be perfect. do not try to silicone over old silicone as it will let go later.

I've just started the tear down. The leak has gotten worse. I hadn't thought whether I was going to remove the old silicone. You're suggested it's a must? Better get some razor blades.