Let us dwell on certified materials. A product which prevents both water and salt ingress into the concrete matrix and cracks present thus meeting Clause 4.3.1© of AS3600Code with regard to chloride and water permeability.
On this basis Radcon represents the lowest cost concrete waterproofing approach available in the global marketplace.
Certainly one could find similar sounding silicate materials at lower costs, however the specifier would be recommending a sealer material to do a waterproofing job. Such materials are not supplied as certified waterproofing technologies, as they do not meet AS3600 requirements.