Integral water tank seal

Dec 5, 2007
18
- - Deale MD
In my new project boat (Beneteau 445 '94), the integral water tank under the V birth was leaking. I took off the lid (not as simple as it sounds..), cleaned it sanded it and covered the whole tank with cloth and epoxy (it has severe delamination). Now I need to put the lid on again and wondering if I should use silicon as it had before or there is something better that is not toxic. Any ideas?
Thanks