ACDelco Silicone Brake Lubricant is a compound containing specially selected premium silicone oils and thickened with high levels of polytetrafluoroethylene (PTFE). This brake lubricant combines the temperature, corrosion, and water resistance typical of silicone compounds, with the outstanding lubrication properties of PTFE. These lubrication properties lower brake friction and slip-stick. ACDelco Silicone Brake Lubricant is compatible with most rubber and plastic compounds.