LUDOX^® LS is a 30% solids aqueous dispersion of 12 nm surface-modified silica. It is formulated to a lower pH than the HS grades of LUDOX^® and contains fewer sodium stabilizing ions, making it particularly useful in applications where sodium can be detrimental. LUDOX^® LS also has good compatibility in solutions that contain organic solvents.

LUDOX^® LS is typically used as a binder in ceramic fiber refractory manufacturing to increase thermal shock resistance and durability to ceramic parts. It can also be used as a binder in water-based coating formulations that contain organic cosolvents. Here, LUDOX^® LS provides added durability to dried films and improves heat and chemical resistance.

In adhesive applications, LUDOX^® LS increases adhesion to glass and metal surfaces and increases shear strength, improving the durability of the cured adhesive.

LUDOX^® LS is also an excellent source of silica for concrete densifier formulations. This property provides a performance advantage over other types of silica in this application. The small particle size of the amorphous silica in LUDOX^® LS allows it to react with hydroxides by easily penetrating the porous surface of concrete, increasing its density and hardness.