Posted by Speedy Builder5 on 18/10/2018 15:49:17:
Interesting that silicon sealant which has acetic acid ?? as the activator has not been mentioned. …
Some silicon sealants evolve small quantities of Acetic Acid as they set. It doesn't mean they're necessarily proof against other acids.
While it's true silicon sealants are resistant to chemicals I don't know how well one would cope with Battery Acid. However, the main objection to using sealant to fix a battery case is it's weak – sticky rather than adhesive and rubbery with low physical strength.
Araldite is a safer bet – it's adhesive, acid resistant, an excellent insulator and strong.
Dave