How can I mend a cracked cistern?

I mended a cracked cistern three years ago, and it's still fine. I used Evo-Stick 'Weatherproof roof and gutter sealant'. I'm sure there are other makes as well. It's a black bituminous gunge that never completely sets. I dried out the inside of the cistern, then tanked most of the inside with the stuff, to allow for cracks creeping. It's not pretty, but who cares when it's inside, and it works?

Jon
January 2013

Drain it wait until totally dry and fill crack from iside with silicone sealer.

Scott
March 2005

if you are not using it then isolate water supply or tie up float valve, you should be covered by your insurance check it out

chris
November 2004

In a short answer no. It is best to replace it .If you mend it and it strts to leak while you are out it will flood your house which isnt funny.

Steve
November 2004