Silica can be used alone for a very smooth, non-sagging, high strength mixture or combined with fillers or fibers to make them non-sagging
A 5-quart quantity of Silica Thickener when combined with 1-gallon of mixed epoxy/hardener, will produce about 1.75-gallons of a non-sagging firm paste
Also referred to as colloidal or fumed silica, and is an excellent thixotropic agent which is used to control the viscosity of mixed epoxy systems