Water Glass is Sodium Silicate. I bought some for the same purpose
at the corner drugstore here in Ketchikan (to stabilize a tufa stone
mold, one of many projects I haven’t gotten around to trying). I
would think if they have it here, it should be available in most any
drugstore/pharmacy. If not, I’m sure they could order it. My quart
bottle cost about $14.00. Ofcourse, everything is expensive here
(the classic explanation is shipping charges)
The container says it is used for sealing concrete floors, water
proofing, and gasket cement. Why do they sell it at a drugstore? I
I have read in several places that it is used to stabilize stones
such as turquoise as well.
btw: Since I haven’t used it yet, I haven’t downloaded a MSDS but it
does say to avoid contact with eyes and skin on the bottle. It would
be wise to check out the safety info before using.