Colloidal Silica - Ron Blank & Associates, Inc.

First-Generation DensifiersChemical densifiers can help concrete to acquire a better polish andmake that polish more durable because they increase abrasionresistance.First-generation concrete densifiers were made from silicates, suchas sodium silicate and potassium silicate; this range of silicate-basedcompounds later broadened to include lithium silicate. Thesecompounds are highly caustic, with a pH of 11 to 13, similar to thealkalinity of lime itself.