Which is the best way to repair a leaky water tank?
To repair water tanks, first expose the reinforcement in all damaged areas using steel wire brushes or by mechanical means. There should be at least 6mm gap behind reinforcement to facilitate cleaning, coating etc. Apply a rust removing solution of Rusticide by cotton waste swab or by brush. After 24 hours apply a passivating coat of Polyalk Fixoprime / cement slurry. (No water added to slurry). Apply two more coats of similar slurry after an interval of 6 to 24 hours between two successive coats.