Silica Sol | SILSEP

Overview

Colloidal silica, engineered for stability

SILSEP silica sol is an aqueous dispersion of nano-scale colloidal SiO₂ particles with tight particle-size distribution and long shelf stability. Available in different particle sizes, concentrations and surface modifications. Detailed grades and specifications on request.

Product Advantages

Why formulators choose it

High binding strength for investment casting shells and refractory systems
Improves hardness, anti-slip and anti-soil performance of coatings
Stable across a wide pH window; low-sodium grades available
Uniform nano particle size for consistent film formation

How It Works

The principle

Silica sol particles carry a charged surface layer that keeps them dispersed indefinitely in water. When water is removed — by drying or gelation — the particles pack and form siloxane bonds with each other and with the substrate, creating a hard, heat-resistant inorganic network. That transition from stable liquid to ceramic-like binder is what makes silica sol the backbone of precision casting shells and inorganic coatings.

Applications

Application fields

Precision investment casting shellsInorganic & hybrid coatingsCatalyst carriersTextile anti-slip finishing

Recommended Grades

Find your grade

SILSEP Silica Sol Series

Particle sizes, concentrations (typically 20–40% SiO₂) and ion types matched to your process — contact us with your application for grade selection and specifications.

Request TDS Request Sample

Questions about grade selection?

Tell us your system and target performance — a SILSEP specialist will recommend the right grade, share the TDS and arrange samples within one business day.