This stuff is just sodium silicate, ie: Water Glass/Liquid Glass, (look it up). And it does work. Only these guy’s figured out how to market it with a fancy name, and charging three times what it would cost to purchase a bottle of the stuff from a chemical company or pharmacy.
As a matter of fact, there’s a vehicle in the shop with a blown head gasket right now. And it’s not worth the price to replace the head gasket. So, the sodium silicate’s going into the cooling system to stop the leak.
Tester