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SOLUTIONS: Cast Iron Repair case 3.

Another area of application where polymer can be useful is on pipes, conduit and ducting made of cast iron. Holes, cracks and splits in piping may be tackled from the outside of the pipe without complete disassembly of the system. Using polymer also avoids welding cast iron in position, something that can be difficult. Thoroughly degrease the area to be repaired. Remove all paint, rust and scale. Make sure the surface is abraded.

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internal surface of the backing plate. Press the plate firmly over the area. The plate should now be held in place until the product has set, this could be done using wire, plastic strapping or cable ties.

Once the patch has set the ties can be removed. Measure out, mix and apply more products over the patch to totally encapsulate it. If a highpressure repair, the product must be applied to the patch and the complete circumference of the pipe.

The repair may require the use of a metal backing plate to strengthen the repair. Select a piece of steel plate of equal thickness to the damaged pipe and shape it to the outside dimensions of the damaged area. The plate should extend 5 cm beyond each side of the damaged area.

Thoroughly abrade the inside and outside of the plate to achieve a coarse profile.

Measure up, mix and apply Metalgrade Rebuild or Express to the prepared pipe surface and to the

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Wrap reinforcement tape around the pipe and patch totally encapsulating it. Make sure the product is impregnating the tape so that the final surface consists of product that can be smoothed out and blending in with the pipe surface.