Sodium Metabisulphite creates an inert gas called Sulphur
Dioxide (SO2) when mixed with water into solution. Both the solution made and
the gas are actually doing the “sterilising”. The solution by
contacting the surfaces itself, and the gas by pushing out oxygen from inside
the container being sterilised. This is very important when we come to bottle a
brew as it means the brew is “cushioned” by the gas and this helps to
protect it from oxidising and infections. For carbonated brews it also reduces
the amount of sediment formed in the bottles.
Use to sterilise all your brewing equipment that has been
Use 1 teaspoon of powder per litre of cold water to make a
Pour some solution into fermenters, bottles etc, swirl
around and leave for 15 minutes before draining out.
Run solution over other items like stirring spoons,
thermometers before use.
Drain solution out of equipment but do not rinse or dry
Use immediately once sterilised.
NB: Long term exposure to metals will eventually corrode so
do not use on Stainless Steel kegs, Stills or Rotokegs.
Limit exposure to rubber parts such as o-rings and bungs.