RB-811 additive, organo fluorine modified polysiloxane., is more cost-effective than fluorocarbon surfactants. Minimum dosage of this additive can reduce surface tension up to 20 mN·m-1 while efficiently optimize leveling performance, chemical stability, and weather resistant property. In addition, when used in aqueous systems, RB-811 has effects of reducing surface tension, wetting, and permeating substrates.