If your toilet tank is leaking from external tank-to-bowl bolts, you should replace the rubber washers and brass bolts using a standard tank-to-bowl gasket kit. Important Warning: If the ceramic porcelain tank itself has a structural crack, you cannot successfully seal it with adhesives or liquid tape. A cracked porcelain tank is structurally compromised and must be replaced entirely to prevent a catastrophic blowout and home flood. Verification: Inspect the tank for hairline cracks and test for leaks after replacing rubber gaskets.
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