Characteristics of fumed silica 1. HJSIL® 150/200/255/300/380 is a kind of hydrophilic fumed silica with a specific surface area of 150/200/255/300/380 m2 /g. It's high purity white colloidal powder.  2. HJSIL® R100/612/615/618/620 is a kind of hydrophobic fumed silica, treated with HMDS (hexamethyldisila- zane) and based on hydrophilic fumed silica.  Applications of fumed silica 1. HTV and RTV silicone rubber 2. Adhesives and sealants 3. Paints 4. Coatings and pigments 5. Inks 6. Negative toners 7. Powder coatings 8. Plastic Packaging of fumed silica 1. 10kg kraft paper bags 2. 1000kg plastic woven bag 3. Customized packaging bag