Qwik-Freezer kit is easy to use. A specially designed jacket is wrapped around the pipe at
the point where the freeze is required. A nozzle on the jacket is then coupled to a
cylinder of liquid (CO2) by means of a high pressure hose. When the liquid (CO2)
is injected into the space between the jacket and the pipe, it immediately expands to form
solid carbon dioxide (dry ice) at a temperature of -109° F (-78°C). This low temperature
quickly freezes the contents, forming a secure "ice plug" which seals the pipe.
The ice plug forms only in the
section of pipe covered by the jacket, so the resulting rise in pressure is very small and
there is no damage to the pipe. The technique can be used safely on iron, lead, steel,
copper and plastic pipe.