LUDOX® SM contains amorphous colloidal silica with a particle size of 7 nm. It is a highly temperature stable binder used in coatings and refractories.
partner icon image
Fulfilled by ChemPoint
Product Overview
LUDOX® SM is an aqueous dispersion containing 30% synthetic amorphous silica with a particle size of 7 nanometers. It features one of the smallest particle sizes of the LUDOX® product line and as such is an excellent binder with high surface area.
Product Specifications
Density (g/cm³, lb/gal): 1.21, 10.1
Boiling Point (760 mm Hg) °C/°F: 100/212
Melting Point °C/°F: 0/32
Vapor Pressure (25°C) mm Hg: 24
Vapor Pressure (38°C) mm Hg: 48
Stabilizing Counter Ion: Sodium
Particle Charge: Negative
Biocide ppm: 240
Primary Chemistry: Colloidal Silica
Features & Benefits
Small particle size
Narrow particle size distribution
High thermal stability
Excellent binders
Adhesion promoters
Anti-slip properties
Anti-blocking agents
Soil retardants
Reinforcing agents for improved resistance
Improved polishing performance
Problems Solved
Sagging of adhesives and sealants caused by a lack of cohesion.
Poor durability of coatings in high temperature applications.
Defects in refractory materials caused by poor performance of organic binders.

LUDOX® SM binds well to metals, oxides, and siliceous materials used in refractory and ceramic applications and increases the durability of formed shapes at very high temperature.

LUDOX® SM can be incorporated into latex paint and adhesive formulations to improve the durability and scrub resistance the latex film. In addition, LUDOX® SM improves the wetting and adhesion to difficult to bond surfaces.

The small particle size of the amorphous silica in LUDOX® SM make it useful as a densifier for concrete. The amorphous silica particles are able to easily penetrate the porous surface of concrete to interact with calcium hydroxide present in the cured cement to form calcium silica hydrate (CHS). This increases the density and improves hardness of the concrete.