STERIS's Vesta-Syde® SQ Quaternary Ammonium Disinfectant family of products made specifically for use on hard non-porous surfaces. The Vesta-Syde SQ products are all made with the same quaternary ammonium formulation, but are processed and packed differently for specific applications. The sterile version, Vesta-Syde SQ st, is double bagged and gamma irradiated for easy entry into aseptic areas. At a use-dilution rate of 0.8% v/v (1:128), the Vesta-Syde SQ products kill a broad spectrum of common bacteria and fungi without harming the surface.