A few years ago when I started brewing I use to use Ritchie Steriliser which contained Sodium Metasilicate. Ive been trying to do some research into Sod, Metasilicate and Ive found you can buy it for around £17.00 for a 25kg sack. I was thinking of buying a sack and sharing it with my local "Burton Beer Circle".
Has anybody ever come across this chemical, the info on Google seems very vague

???
Thanks guys
Steve H