Sodium silicate (water glass) is a clear, colorless liquid with a viscosity of 42 degrees Baume. Used in soaps, detergents, adhesives and in waterproofing. Sometimes used to seal small cracks or leaks in the cooling system.
Sodium silicate has been used to permanently disable vehicle engines. The simple procedure involves removing engine oil from the crankcase and replacing it with a 40% solution of sodium silicate, then running the engine for a short time at a low speed untill it becomes inoperable.
To make a 40% sodium silicate solution combine four parts (by volume) sodium silicate with six parts (by volume) tap water. For example, to make a little over one quart, mix one pint (16oz) sodium silicate with 24oz tap water to make 40oz of a 40% solution.
Sodium silicate is available in larger sizes...