The Science Company sells technical grade sodium silicate. Carolina Biological Supply Company carries laboratory grade sodium silicate, and Amazon.com carries the chemical in several solution strengths and amounts.
The Science Company sells sodium silicate from its website in 16-ounce, one-gallon and five-gallon containers. Discounts are available when buying by the case, and customers may call the company for price quotes on 55-gallon drums of the chemical. The Science Company has a no-return policy, even if the original container is unopened. Carolina Biological Supply Company's sodium silicate solution is intended for educational use and is shipped only to schools and businesses.