Considering eggs and water glass

Have you ever used water glassing, or heard of it?  It's an old method of preserving eggs, dating back before the days of home electricity.

This page describes how it works.  The gist is storing eggs in a container filled with a mixture of water and "water glass", a/k/a "liquid glass" or sodium silicate.  If you do it correctly,

Fresh, unwashed eggs kept in a solution of water glass will remain good and useable for 4 to 6 months when properly collected and stored.

Wikipedia lists a bunch of uses for sodium silicate, including home brewing and firefighting, so perhaps the material isn't hard to obtain.

(thanks to Jeffrey Viggiano)