The repair of a leaking cast iron wastewater pipe at an iconic central London hotel

Cast Iron Wastewater Pipe Repair in a London Hotel

After several unsuccessful repair attempts, an iconic hotel in central London turned to Sylmasta to find a solution for a leaking cast iron wastewater pipe located above one of its most prestigious rooms.


What made this such a troublesome repair was the location of the leaking wastewater pipe. It was situated between the floors of the building, making access difficult.

The hotel had previously attempted to fix the leaking pipe using pipe repair tape. This had proven ineffective as the space constraints meant that the tape could not be wrapped around the pipe with the required stretch, causing the repair to fail.

The crack was circular, around 2 inches by 1 inch. For a successful repair, it would first need to be sealed with a more suitable solution than pipe repair tape.


Sylmasta therefore recommended the use of Superfast Steel epoxy putty. The size of the crack meant that a significant amount of epoxy putty would be needed to seal the hole.

To help with the application, the epoxy putty was kneaded by hand and formed into a disc larger than the size of the hole to completely cover it. It was then attached to a strip of heavy polythene sheeting which supported the putty as it was stretched over the hole.

Once the disc was in place, the edges were pushed tightly down to form a good seal between the surface of the cast iron pipe and the epoxy putty on the polythene sheeting, plugging the crack.

The whole repair was then overwrapped with a SylWrap Pipe Bandage. SylWrap is water activated and set to provide a rock-hard, impact resistant layer over the epoxy putty. The two products combined offered the hotel a permanent solution to the problem pipe.


The repair was a success, allowing the hotel to reopen one of their most popular rooms to the public. From a technical point of view, the use of a strip of polythene sheeting eased the application of the Superfast Steel.

It is an application method which could be used for future repairs in which large quantities of epoxy putty are required.


Going forward, Sylmasta have recommended to a number of hotels that they take stock of a SylWrap Pipe Repair Contractor Case so that they are fully equipped for dealing with leaking pipes.

Each case contains enough pipe repair products to carry out up to six permanent repairs at a cheaper cost-per-repair than when buying individual kits.

By keeping a Contractor Case on-site, a hotel has everything they need to fix a pipe as soon as a leak occurs. There is no need to close rooms or facilities while equipment or a plumber is found, saving the hotel money and ensuring that guests are not inconvenienced.

Repair Photos

Products Used

SylWrap Standard Pipe Repair can permanently seal leaking pipes in under 30 minutes with no training required
SylWrap Standard Pipe Repair Kit
The SylWrap Standard Pipe Repair Kit allows for a permanent fix to a leaking pipe to be made quickly and easily without any formal training.
SylWrap Pipe Repair Bandages are water-activated and set rock hard in minutes, helping to strengthen and repair damaged and leaking pipework
SylWrap Pipe Repair Bandages
SylWrap Pipe Repair Bandages are water-activated fibreglass bandages which set rock hard in minutes to reinforce, refurbish and help to repair damaged and leaking pipes.
Superfast Steel Epoxy Putty Stick is used to plug holes, seal cracks and repair leaking pipes
Superfast Steel Epoxy Putty Stick
Superfast Steel is a steel-filled epoxy putty stick which is used to seal cracks, holes and leaking joints on pipes of all types and sizes.

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