Cab-O-Sil Fumed Silica

Cab-O-Sil is a premium-grade fumed silica thickening agent, manufactured in the USA and trusted for high-performance composite and surfboard applications.

When mixed with polyester or epoxy resins, it creates a smooth, stable, non-sagging paste ideal for structural bonding and precision repairs. Compared to microsphere fillers like Q-Cel, Cab-O-Sil offers superior strength and flexibility, making it the preferred choice for high-load applications.

Because it cures translucent, it must be pigmented if a white or colored finish is required.