Cabosil Fumed Silica - 1 Gallon Epoxy Resin Filler Thickener 1. BENEFITS: Helps to provide sag resistance, anti-settling, anti-corrosive performance, shelf stability and mechanical reinforcement in epoxy coatings. 2. FUMED SILICA has interesting thickening and thixotropic properties, and an enormous external surface area. Particle sizes are for primary particles, which form branched, chain-like aggregates a few tenths of a micron long. 3. GENERAL INFO: Fumed silica may be synthesized by high temperature hydrolysis of SiCl4 in O2(N2)/H2 flame. It is amorphous in nature and possesses very high specific area. The micro droplets of amorphous silica fuse into a branch and form a chain like agglomerate. Shipped from USA.