Polyether modified silicone oil Silway 248 Description Silway 248 spray adjuvant is a Polyether modified silicone oil. In aqueous solutions, it gives super spreading and does dramatically reduce surface tension. Typically, Silway 248 Polyether modified silicone oil reduces the surface tension of aqueous agricultural mixtures significantly. At concentrations as low as 0.1 percent, Silway 248 Polyether modified silicone oil reduces surface tension below 22 mN/m, which produces very rapid wetting and spreading on hard-to-wet surfaces such as waxy leaves. Silway 248 spray adjuvant is nonionic in nature, making it useful with a broad range of agrochemical formulations.