IOTA‑26194 filler surface treatment agent is developed for the surface modification of inorganic powders. It is applicable to surface treatment of fillers such as fumed silica, aluminum hydroxide and magnesium hydroxide. Compatible with two mainstream modification processes: dry‑process and wet‑process. It requires little operational effort and no complicated equipment retrofitting. Treated fillers gain adjusted surface polarity and improved compatibility with organic matrices, reducing powder agglomeration. It works in silicone rubber and flame‑retardant composite formulations for better powder dispersion and handling performance. It delivers auxiliary solutions for downstream formulation adjustment, suitable for powder modification plants and material compounding enterprises.