How can I fix my toilet, make Royal Doulton, model Vitreous china 150,?

I agree with Dave But have gone a step further! My RD Cistern is 150 1981 mustard Yellow how retro!
1 only crack going 70% down the back and around the side, Dismantled the inner workings of the Cistern replaced the stop valve rubber and cleaned it out Dried it off. Then using a Dremel I grooved the crack both inside and outside and I ground of a little of the glazing either side of the groove so the epoxy had some "tooth' to attach to! . Using an epoxy I did the outside first Let that harden 24hrs. Then did the inside again waiting 24 hrs To be doubly sure I then put a layer of Sikaflex -Pro sealant over the epoxy and the internal cistern wall going about 2cm either side of the epoxy to ensure no water seepage. About to reinstall Fingers crossed should be OK

Rodney
November 2016

20 years ago I had three cracks from top down the front all caused by someone accidentally falling over. I cleaned the water out and carefully cleaned the interior of the tank, using detergent. I then dried it out using a hair drier. I bought a fresh syringe of clear silastic and covered the cracks on the inside feathering the coating from a thickness of about 6mm over the crack to zero out 15mm either side. Two of the cracks were extending down most of the height of the tank, some 250mm underwater and leaking considerably leaking. We are still using the same tank and cistern. No leaks so far!

Byron
May 2016

You will have to drain the cistern and dry it out, then make a "v" groove along the crack to widen it. Get some epoxy resin 2 part filler (Araldite Rapid), mix some up and press it firmly into the "v" groove leaving it a little proud and overlapping the surrounding area.

Dave
June 2009