We have been experimenting with resin coating on the inner surface of cast iron guttering over the winter months, and we are finding that it definitely has its place alongside conventional guttering repairs.
In two situations it can save an enormous amount of time and money. Firstly, if the majority of the guttering is sound and in good repair, using resin to coat and isolate a small rusty leaking section can be an economic way of prolonging the life of the rusty section of the gutter until the whole lot needs replacing. This might give as much as five, or ten, years extra service before the major replacement is needed.
The other situation where resin coating more than pay for itself is if the casting of the gutters or junctions is unique. Where a design is cast into the guttering system, a repair to incorporate the original cast iron work can be costly if it is possible at all. A resin coating on the inside of the original cast iron work can ensure that it continues to fulfil its original function, as well as preserving its integrity by excluding the elements that caused the rusting from the original ironwork. As a means of preserving older cast ironwork, we at PipeServ recommend it.