Evonik AEROSIL R812S is a hydrophobic fumed silica imported from Germany, post-treated with HMDS (Hexamethyldisilazane) from A300. Designed for rheology control in complex liquid systems, it has high transparency, strong anti-corrosion and easy processing, suitable for coatings, adhesives, silicone rubber and other fields.
Efficient rheology control - Precisely controls flow in complex liquid systems such as two-component epoxy, strongly anti-sagging and anti-settling, ensuring uniform construction
High-quality hydrophobic modification - Professionally treated with HMDS, stable hydrophobicity, suitable for multiple systems, improving product water resistance, moisture resistance and storage stability
High transparency and wide adaptability - Excellent transparency, especially suitable for automotive clear coats and high-end coatings, without affecting product appearance and optical performance
Pigment stabilization and enhancement - As an anti-settling agent, it improves pigment dispersion stability, enhances coating anti-corrosion effect and extends service life
Multifunctional adaptation - It has both powder flow aid and silicone rubber reinforcement effects, easy to add, good compatibility, and suitable for multi-industry processing needs
Coating systems - Automotive OEM paint, industrial paint, marine paint, flow control and anti-settling, enhance anti-corrosion, improve coating texture and durability
Adhesives and sealants - Control thixotropy, prevent sagging, enhance bonding strength and water resistance, adapt to multi-scenario sealing needs
Silicone rubber products - Improve mechanical and optical properties, optimize product strength and light transmittance, suitable for high-end silicone rubber formulations
Powder coatings - Used as a flow aid, improve powder fluidity, anti-caking, enhance spraying uniformity and powder transfer efficiency
Radiation curing systems - Suitable for UV and other radiation curing scenarios, flow control and anti-sagging, ensuring stable appearance and performance of cured products
| Brand | Evonik |
| Product Series | AEROSIL Hydrophobic Fumed Silica |
| Product Type | Hydrophobic Fumed Silica |
| Surface Treatment Agent | HMDS (Hexamethyldisilazane) |
| Raw Material Base | A300 Fumed Silica |
| BET Surface Area | 195-245 m²/g |
| Carbon Content | 3.0-4.0 wt% |
| Loss on Drying | <0.5 wt% |
| pH Value | 5.5-9.0 |
| SiO₂ Content | >99.8 wt% |
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